/* ========== 2018 Material Design 风格 + 响应式(前台) ========== */
:root {
    /* 品牌色 */
    --primary: #4285F4;
    --primary-dark: #3367D6;
    --primary-light: #7BAAF7;
    --accent: #FF6D00;

    /* 功能色 */
    --success: #0F9D58;
    --success-bg: #E8F5E9;

    /* 背景色 */
    --bg: #FAFAFA;
    --card-bg: #FFFFFF;
    --surface: #F5F5F5;

    /* 文字色 */
    --text: #212121;
    --text-secondary: #616161;
    --text-hint: #9E9E9E;

    /* 边框 */
    --border: #E0E0E0;
    --divider: #EEEEEE;

    /* 阴影 */
    --elevation-1: 0 1px 3px rgba(0,0,0,0.12);
    --elevation-2: 0 3px 6px rgba(0,0,0,0.12);

    /* 圆角 */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-round: 20px;

    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== 重置 ========== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

/* ========== 桌面端 (默认) ========== */
body {
    background: var(--bg);
    font-family: Roboto, -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    font-size: 16px;
    font-weight: 400;
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
    padding: 24px 16px;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--elevation-2);
}

h1 {
    font-size: 32px;
    font-weight: 400;
    text-align: center;
    padding-bottom: 12px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--primary);
    position: relative;
}

h1::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background: var(--accent);
}

h2 {
    font-size: 22px;
    font-weight: 400;
    padding-bottom: 8px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--divider);
    display: flex;
    align-items: center;
    gap: 8px;
}

h2 i { color: var(--primary); font-size: 0.85em; }

h3 { font-size: 18px; font-weight: 500; margin-bottom: 8px; }

/**hr { border: none; border-top: 1px solid var(--divider); margin: 20px 0; }*/
hr {
    border: none;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border) 20%, var(--border) 80%, transparent);
    margin: 24px 0;
}
hr {
    border: none;
    text-align: center;
    margin: 24px 0;
    overflow: visible;
}
hr::after {
    content: '◆';
    position: relative;
    top: -0.7em;
    font-size: 8px;
    color: var(--border);
    background: var(--card-bg);
    padding: 0 8px;
}

a { color: var(--primary); text-decoration: none; font-weight: 500; }
a:visited { color: var(--primary-dark); }
a:hover { color: var(--primary-dark); }

/* 导航 */
nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin-bottom: 24px;
    padding: 6px;
    background: var(--surface);
    border-radius: var(--radius);
}

nav a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
    transition: all var(--transition);
}

nav a:hover { background: rgba(66,133,244,0.08); color: var(--primary); text-decoration: none; }

nav form { display: inline-flex; align-items: center; gap: 4px; margin: 0; }

nav input[type="text"] { width: 160px; margin-bottom: 0; font-size: 14px; padding: 8px 6px; }
nav button { font-size: 13px; padding: 8px 14px; }

/* 表单 */
form { margin: 16px 0; }

label {
    display: block;
    margin-bottom: 2px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
textarea,
select {
    font-family: inherit;
    font-size: 15px;
    border: none;
    border-bottom: 2px solid var(--border);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    padding: 10px 6px;
    background: var(--surface);
    color: var(--text);
    width: auto;
    max-width: 100%;
    transition: all var(--transition);
    margin-bottom: 14px;
    outline: none;
}

input:hover, textarea:hover, select:hover { background: #EEEEEE; }
input:focus, textarea:focus, select:focus { background: var(--card-bg); border-bottom-color: var(--primary); }

textarea {
    width: 100%;
    resize: vertical;
    min-height: 100px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px;
}
textarea:focus { border-color: var(--primary); }

select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 18 18'%3E%3Cpath fill='%23616161' d='M5 7l4 4 4-4z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 6px center;
    padding-right: 28px;
    cursor: pointer;
}

/* 按钮 */
input[type="submit"],
button {
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--primary);
    color: #FFF;
    padding: 10px 20px;
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    box-shadow: var(--elevation-1);
    min-height: 36px;
}

input[type="submit"]:hover,
button:hover { background: var(--primary-dark); box-shadow: var(--elevation-2); transform: translateY(-1px); }
input[type="submit"]:active,
button:active { background: #2851A3; transform: translateY(0); }

button[style*="background-color:#4CAF50"],
button[style*="background-color: #4CAF50"] { background: var(--success); }
button[style*="background-color:#4CAF50"]:hover,
button[style*="background-color: #4CAF50"]:hover { background: #0B8043; }

/* 消息 */
.message {
    background: #FFF8E1;
    border-left: 4px solid var(--accent);
    padding: 12px 16px;
    margin: 16px 0;
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: #E65100;
    animation: slideUp 0.2s ease;
}

.error-msg {
    background: #FFEBEE;
    border-left: 4px solid #D50000;
    padding: 12px 16px;
    margin: 16px 0;
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: #B71C1C;
    animation: slideUp 0.2s ease;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 页脚 */
.footer {
    margin-top: 32px;
    padding-top: 16px;
    font-size: 12px;
    text-align: center;
    color: var(--text-hint);
    border-top: 1px solid var(--divider);
}

/* 标签 */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--surface);
    color: var(--primary-dark);
    border: 1px solid var(--border);
    padding: 4px 12px;
    margin: 3px;
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-round);
    text-decoration: none;
    transition: all var(--transition);
}

.tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); text-decoration: none; }

/* 标签云 */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin: 20px 0;
    padding: 20px;
    background: var(--surface);
    border-radius: var(--radius);
}

.tag-cloud a { margin: 0; transition: transform var(--transition); }
.tag-cloud a:hover { transform: scale(1.1); }

/* 留言板 */
.gb-item {
    margin-bottom: 8px;
    padding: 12px;
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    box-shadow: var(--elevation-1);
    font-size: 14px;
}
.gb-item:hover { box-shadow: var(--elevation-2); }

/* 文章图片 */
.container article img,
.container div img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px auto;
    border-radius: var(--radius-sm);
    box-shadow: var(--elevation-2);
}

/* 文章内容 */
.container article,
.container div { line-height: 1.8; font-size: 16px; }

.container article p,
.container div p { margin-bottom: 16px; }

.container article blockquote,
.container div blockquote {
    border-left: 4px solid var(--primary);
    padding: 8px 16px;
    margin: 16px 0;
    background: var(--surface);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
    font-style: italic;
}

.container article code,
.container div code {
    background: var(--surface);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
    color: var(--accent);
    border: 1px solid var(--border);
}

.container article pre,
.container div pre {
    background: #263238;
    color: #ECEFF1;
    padding: 16px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 16px 0;
    font-size: 13px;
}

.container article pre code,
.container div pre code { background: transparent; color: inherit; padding: 0; border: none; }

/* 评论区 */
#comment-form {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 20px;
    margin-top: 24px;
    box-shadow: var(--elevation-1);
}

#comment-form h3 { font-size: 18px; font-weight: 500; margin-bottom: 12px; }

/* 友链卡片 */
.link-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    margin: 20px 0;
}

.link-card {
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    padding: 16px;
    box-shadow: var(--elevation-1);
    border-top: 3px solid var(--primary);
    transition: all var(--transition);
    word-wrap: break-word;
}

.link-card:hover { box-shadow: var(--elevation-2); transform: translateY(-2px); }

.link-card h3 { margin: 0 0 6px 0; font-size: 16px; font-weight: 500; }
.link-card h3 a { color: var(--text); }
.link-card h3 a:hover { color: var(--primary); text-decoration: none; }

.link-card p { margin: 6px 0; color: var(--text-secondary); font-size: 14px; }

.link-card .link-url {
    font-size: 11px;
    color: var(--text-hint);
    word-break: break-all;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--divider);
}

.link-card .link-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: #E8F5E9;
    color: #2E7D32;
    border: 1px solid #C8E6C9;
    padding: 3px 10px;
    font-size: 11px;
    font-weight: 500;
    border-radius: var(--radius-round);
    margin-top: 6px;
}

/* 友链表单 */
.link-form-section {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 20px;
    margin-top: 24px;
    box-shadow: var(--elevation-1);
}

.link-form-section h3 { font-size: 18px; font-weight: 500; margin-bottom: 8px; }

.link-form-section .note {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    padding: 8px 12px;
    background: #E3F2FD;
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary);
}

.link-form-section label { margin-top: 12px; font-size: 12px; }

.link-form-section input[type="text"],
.link-form-section input[type="url"],
.link-form-section input[type="email"],
.link-form-section textarea { width: 100%; margin-top: 4px; }

/* 本站信息 */
.info-box {
    background: #E3F2FD;
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin: 16px 0;
    box-shadow: var(--elevation-1);
}

.info-box table { width: 100%; border-collapse: collapse; }
.info-box td { padding: 6px 10px; border-bottom: 1px solid #BBDEFB; font-size: 14px; }
.info-box td:first-child { color: var(--text-secondary); font-weight: 500; white-space: nowrap; width: 85px; }

/* 归档链接 */
p a[href*="page=archive"] {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--divider);
    font-size: 14px;
    margin: 3px;
    transition: all var(--transition);
}

p a[href*="page=archive"]:hover { background: #E3F2FD; border-color: var(--primary-light); text-decoration: none; }

/* 文章链接 */
h3 a[href*="article_id"] { color: var(--text); font-weight: 500; font-size: 16px; }
h3 a[href*="article_id"]:hover { color: var(--primary); }

/* 公告 */
div[style*="background:#FFF9C4"] {
    background: #FFF8E1 !important;
    border-left: 4px solid var(--accent) !important;
}

/* ========== 平板端 ========== */
@media (max-width: 1024px) {
    body { padding: 16px 12px; }
    .container { max-width: 95%; padding: 24px; }
    h1 { font-size: 28px; }
    h2 { font-size: 20px; }
    h3 { font-size: 17px; }
    .link-list { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
    .link-card { padding: 14px; }
}

/* ========== 手机端 ========== */
@media (max-width: 600px) {
    body {
        padding: 0;
        font-size: 14px;
    }

    .container {
        max-width: 100%;
        padding: 8px;
        border-radius: 0;
        box-shadow: none;
        min-height: 100vh;
    }

    h1 {
        font-size: 18px;
        padding-bottom: 6px;
        margin-bottom: 10px;
        border-bottom-width: 1px;
    }

    h1::after { width: 30px; height: 1px; }

    h2 {
        font-size: 15px;
        padding-bottom: 4px;
        margin-bottom: 8px;
    }

    h3 { font-size: 14px; margin-bottom: 4px; }

    p, li, span { font-size: 14px; }
    small { font-size: 12px; }

    hr { margin: 12px 0; }

    nav {
        background: transparent;
        padding: 2px 0;
        gap: 2px;
        margin-bottom: 12px;
    }

    nav a {
        padding: 4px 6px;
        font-size: 9px;
        background: var(--card-bg);
        border: 1px solid var(--border);
        letter-spacing: 0.02em;
    }

    nav form {
        width: 100%;
        order: 99;
        margin-top: 6px;
        display: flex;
        gap: 3px;
    }

    nav input[type="text"] {
        flex: 1;
        width: auto;
        min-width: 0;
        font-size: 13px;
        padding: 6px 4px;
        min-height: 32px;
    }

    nav button {
        font-size: 11px;
        padding: 6px 10px;
        min-height: 32px;
    }

    form { margin: 10px 0; }

    label { font-size: 10px; }

    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="url"],
    textarea {
        width: 100%;
        font-size: 13px;
        padding: 6px 4px;
        margin-bottom: 8px;
    }

    textarea { padding: 6px; min-height: 70px; }

    input[type="submit"],
    button {
        width: 100%;
        font-size: 12px;
        padding: 8px 14px;
        min-height: 34px;
    }

    .message,
    .error-msg {
        padding: 8px 10px;
        margin: 10px 0;
        font-size: 12px;
        border-left-width: 3px;
    }

    .footer {
        margin-top: 16px;
        padding-top: 8px;
        font-size: 10px;
    }

    .tag {
        padding: 2px 7px;
        margin: 1px;
        font-size: 10px;
    }

    .tag-cloud {
        padding: 8px;
        gap: 4px;
        margin: 10px 0;
    }

    .tag-cloud a { font-size: 12px !important; }

    .gb-item {
        padding: 8px;
        margin-bottom: 4px;
        font-size: 12px;
    }

    .container article img,
    .container div img { margin: 10px auto; }

    .container article,
    .container div { line-height: 1.5; font-size: 13px; }

    .container article p,
    .container div p { margin-bottom: 8px; }

    .container article blockquote,
    .container div blockquote {
        padding: 4px 8px;
        margin: 8px 0;
        font-size: 12px;
    }

    .container article pre,
    .container div pre {
        padding: 8px;
        margin: 8px 0;
        font-size: 10px;
    }

    #comment-form { padding: 8px; margin-top: 12px; }
    #comment-form h3 { font-size: 14px; margin-bottom: 6px; }

    .link-list { grid-template-columns: 1fr; gap: 6px; margin: 10px 0; }

    .link-card { padding: 8px; border-top-width: 2px; }
    .link-card h3 { font-size: 13px; margin-bottom: 2px; }
    .link-card p { font-size: 11px; margin: 2px 0; }
    .link-card .link-url { font-size: 9px; margin-top: 4px; padding-top: 4px; }
    .link-card .link-tag { font-size: 9px; padding: 1px 6px; }

    .link-form-section { padding: 8px; margin-top: 12px; }
    .link-form-section h3 { font-size: 14px; }
    .link-form-section .note { font-size: 10px; padding: 4px 8px; margin-bottom: 6px; }
    .link-form-section label { font-size: 10px; margin-top: 6px; }

    .info-box { padding: 8px; margin: 8px 0; border-left-width: 3px; }
    .info-box td { padding: 3px 6px; font-size: 11px; }
    .info-box td:first-child { width: 60px; }

    p a[href*="page=archive"] { font-size: 11px; padding: 3px 8px; }

    h3 a[href*="article_id"] { font-size: 13px; }

    ul[style*="list-style-type:none"] { padding-left: 8px !important; }
    ul[style*="list-style-type:none"] li { font-size: 12px; }
}

/* ========== 手机端 ========== */
@media (max-width: 600px) {
    body {
        padding: 0;
        font-size: 14px;
    }

    .container {
        max-width: 100%;
        padding: 8px;
        border-radius: 0;
        box-shadow: none;
        min-height: 100vh;
    }

    h1 {
        font-size: 18px;
        padding-bottom: 6px;
        margin-bottom: 10px;
        border-bottom-width: 1px;
    }

    h1::after { width: 30px; height: 1px; }

    h2 {
        font-size: 15px;
        padding-bottom: 4px;
        margin-bottom: 8px;
    }

    h3 { font-size: 14px; margin-bottom: 4px; }

    p, li, span { font-size: 14px; }
    small { font-size: 12px; }

    hr { margin: 12px 0; }

    nav {
        background: transparent;
        padding: 2px 0;
        gap: 2px;
        margin-bottom: 12px;
    }

    nav a {
        padding: 4px 6px;
        font-size: 9px;
        background: var(--card-bg);
        border: 1px solid var(--border);
        letter-spacing: 0.02em;
    }

    nav form {
        width: 100%;
        order: 99;
        margin-top: 6px;
        display: flex;
        gap: 3px;
    }

    nav input[type="text"] {
        flex: 1;
        width: auto;
        min-width: 0;
        font-size: 13px;
        padding: 6px 4px;
        min-height: 32px;
    }

    nav button {
        font-size: 11px;
        padding: 6px 10px;
        min-height: 32px;
    }

    form { margin: 10px 0; }

    label { font-size: 10px; }

    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="url"],
    textarea {
        width: 100%;
        font-size: 13px;
        padding: 6px 4px;
        margin-bottom: 8px;
    }

    textarea { padding: 6px; min-height: 70px; }

    input[type="submit"],
    button {
        width: 100%;
        font-size: 12px;
        padding: 8px 14px;
        min-height: 34px;
    }

    .message,
    .error-msg {
        padding: 8px 10px;
        margin: 10px 0;
        font-size: 12px;
        border-left-width: 3px;
    }

    .footer {
        margin-top: 16px;
        padding-top: 8px;
        font-size: 10px;
    }

    .tag {
        padding: 2px 7px;
        margin: 1px;
        font-size: 10px;
    }

    .tag-cloud {
        padding: 8px;
        gap: 4px;
        margin: 10px 0;
    }

    .tag-cloud a { font-size: 12px !important; }

    .gb-item {
        padding: 8px;
        margin-bottom: 4px;
        font-size: 12px;
    }

    .container article img,
    .container div img { margin: 10px auto; }

    .container article,
    .container div { line-height: 1.5; font-size: 13px; }

    .container article p,
    .container div p { margin-bottom: 8px; }

    .container article blockquote,
    .container div blockquote {
        padding: 4px 8px;
        margin: 8px 0;
        font-size: 12px;
    }

    .container article pre,
    .container div pre {
        padding: 8px;
        margin: 8px 0;
        font-size: 10px;
    }

    #comment-form { padding: 8px; margin-top: 12px; }
    #comment-form h3 { font-size: 14px; margin-bottom: 6px; }

    .link-list { grid-template-columns: 1fr; gap: 6px; margin: 10px 0; }

    .link-card { padding: 8px; border-top-width: 2px; }
    .link-card h3 { font-size: 13px; margin-bottom: 2px; }
    .link-card p { font-size: 11px; margin: 2px 0; }
    .link-card .link-url {
        font-size: 9px;
        margin-top: 4px;
        padding-top: 4px;
        word-break: break-all;
        overflow-wrap: break-word;
    }
    .link-card .link-tag { font-size: 9px; padding: 1px 6px; }

    .link-form-section { padding: 8px; margin-top: 12px; }
    .link-form-section h3 { font-size: 14px; }
    .link-form-section .note { font-size: 10px; padding: 4px 8px; margin-bottom: 6px; }
    .link-form-section label { font-size: 10px; margin-top: 6px; }

    .info-box { padding: 8px; margin: 8px 0; border-left-width: 3px; }
    .info-box td { padding: 3px 6px; font-size: 11px; word-break: break-all; }
    .info-box td:first-child { width: 55px; }
    .info-box td:last-child { word-break: break-all; }

    /* ========== RSS 聚合移动端修复 ========== */
    .rss-aggregation {
        padding: 8px !important;
        margin: 10px 0 !important;
    }

    .rss-aggregation > div:first-child {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 6px !important;
    }

    .rss-aggregation > div:last-child {
        grid-template-columns: 1fr !important;
        gap: 6px !important;
    }

    .rss-aggregation h4 {
        font-size: 13px !important;
    }

    .rss-aggregation a {
        word-break: break-all !important;
    }

    /* ========== 复制模块移动端修复 ========== */
    .info-box table {
        table-layout: fixed;
        width: 100%;
    }

    .info-box td {
        word-break: break-all;
        overflow-wrap: break-word;
        hyphens: auto;
    }

    .info-box button {
        width: auto !important;
        font-size: 11px !important;
        padding: 6px 10px !important;
        min-height: auto !important;
    }

    /* ========== 本站信息链接溢出修复 ========== */
    div[style*="background:#E3F2FD"] td:last-child {
        word-break: break-all;
        overflow-wrap: break-word;
        font-size: 11px;
    }

    p a[href*="page=archive"] { font-size: 11px; padding: 3px 8px; }

    h3 a[href*="article_id"] { font-size: 13px; }

    ul[style*="list-style-type:none"] { padding-left: 8px !important; }
    ul[style*="list-style-type:none"] li { font-size: 12px; }
}
/* ========== 返回顶部按钮 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    box-shadow: var(--elevation-2);
    z-index: 999;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}
.back-to-top.show {
    opacity: 1;
    transform: translateY(0);
}
.back-to-top:hover {
    background: var(--primary-dark);
    box-shadow: var(--elevation-3);
    transform: translateY(-2px);
}
@media (max-width: 600px) {
    .back-to-top {
        bottom: 20px;
        right: 16px;
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
}

/* ========== 搜索高亮 ========== */
.search-highlight {
    background: none;
    color: #E65100;
    font-weight: 700;
}

/* ========== 文章底部导航 ========== */
.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--divider);
}
.article-nav a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text-secondary);
    font-size: 13px;
    transition: all 0.2s;
    max-width: 48%;
}
.article-nav a:hover {
    background: var(--primary-bg);
    color: var(--primary);
    text-decoration: none;
}
.article-nav .nav-prev {
    text-align: left;
}
.article-nav .nav-next {
    text-align: right;
    margin-left: auto;
}
.article-nav .nav-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-hint);
    display: block;
}
.article-nav .nav-title {
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: block;
}

/* ========== 相关文章 ========== */
.related-articles {
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--divider);
}
.related-articles h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--text);
}
.related-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}
.related-list a {
    display: block;
    padding: 10px 14px;
    background: var(--surface);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.2s;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.related-list a:hover {
    background: var(--primary-bg);
    color: var(--primary);
    text-decoration: none;
}

/* ========== 代码高亮 ========== */
pre {
    position: relative;
    padding-top: 32px !important;
}
pre::before {
    content: attr(data-lang);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 4px 12px;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-hint);
    background: rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
pre code {
    display: block;
    overflow-x: auto;
}

/* ========== 分享按钮 ========== */
.share-buttons {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    flex-wrap: wrap;
}
.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px;
    border-radius: var(--radius-round);
    font-size: 12px;
    font-weight: 500;
    color: #fff;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
}
.share-btn:hover {
    opacity: 0.85;
    transform: translateY(-1px);
    text-decoration: none;
    color: #fff;
}
.share-weibo { background: #E6162D; }
.share-twitter { background: #1DA1F2; }
.share-facebook { background: #1877F2; }
.share-copy { background: var(--text-secondary); }
.share-copy.copied { background: var(--success); }

@media (max-width: 600px) {
    .article-nav { flex-direction: column; }
    .article-nav a { max-width: 100%; }
    .related-list { grid-template-columns: 1fr; }
    .share-btn { padding: 8px 12px; font-size: 13px; }
}
/* ========== 打印 ========== */
@media print {
    body { background: #fff; color: #000; padding: 0; }
    .container { box-shadow: none; border: 1px solid #ddd; max-width: 100%; }
    nav, .footer, button, form, #comment-form { display: none; }
}

/* ========== 减少动画 ========== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========== 热门文章轮播 ========== */
.carousel-section { margin: 20px 0 0 0; }
.carousel-container {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
   /* background-color: url (https://api.elaina.cat/random/);*/
    /*background-image: var(--carousel-bg-image, none);*/
    background: url(https://api.elaina.cat/random/);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
/* 半透明遮罩，让文字可读 */
.carousel-container::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 0;
    border-radius: 8px;
}
.carousel-track {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
    position: relative;
    z-index: 1;
}
.carousel-slide { flex: 0 0 100%; min-width: 100%; opacity: 0.5; transition: opacity 0.3s ease; }
.carousel-slide.active { opacity: 1; }
.carousel-link { display: block; text-decoration: none; color: #FFFFFF; position: relative; z-index: 1; }
.carousel-link:hover { text-decoration: none; color: #FFFFFF; }
.carousel-card {
    padding: 28px 40px 24px;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.carousel-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75em;
    font-weight: 600;
    padding: 3px 12px;
    border-radius: 20px;
    width: fit-content;
    margin-bottom: 10px;
    border: 1px solid rgba(255,255,255,0.15);
}
.carousel-badge-hot {
    background: rgba(255,87,34,0.35);
    color: #FFAB91;
    border-color: rgba(255,87,34,0.4);
    animation: badgePulse 2s ease-in-out infinite;
}
@keyframes badgePulse {
    0%,100% { background: rgba(255,87,34,0.35); }
    50% { background: rgba(255,87,34,0.5); }
}
.carousel-title {
    font-size: 1.4em;
    font-weight: 700;
    margin: 0 0 8px 0;
    color: #FFFFFF;
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.carousel-desc {
    font-size: 0.9em;
    margin: 0 0 14px 0;
    opacity: 0.9;
    line-height: 1.5;
    color: rgba(255,255,255,0.9);
}
.carousel-stats { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.carousel-clicks {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8em;
    color: rgba(255,255,255,0.85);
    background: rgba(255,255,255,0.15);
    padding: 3px 10px;
    border-radius: 12px;
}
.carousel-action {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85em;
    font-weight: 500;
    color: rgba(255,255,255,0.85);
    transition: color 0.2s;
}
.carousel-link:hover .carousel-action { color: #FFFFFF; }

/* 横线指示器 */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 14px 0;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 2;
}
.carousel-dot {
    width: 28px;
    height: 3px;
    min-height: 3px;
    max-height: 3px;
    border-radius: 1.5px;
    border: none;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    padding: 0;
    margin: 0;
    outline: none;
    box-sizing: content-box;
    transition: all 0.3s ease;
    display: inline-block;
    vertical-align: middle;
    line-height: 0;
    font-size: 0;
}
.carousel-dot.active {
    background: #FFFFFF;
    width: 40px;
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
}
.carousel-dot:hover {
    background: rgba(255, 255, 255, 0.7);
}
.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255,255,255,0.2);
    color: #FFFFFF;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 3;
    transition: all 0.2s;
    font-size: 16px;
}
.carousel-arrow:hover {
    background: rgba(255,255,255,0.3);
    border-color: rgba(255,255,255,0.4);
}
.carousel-prev { left: 12px; }
.carousel-next { right: 12px; }

@media (max-width: 600px) {
    .carousel-card { padding: 22px 48px 20px 20px; min-height: 120px; }
    .carousel-title { font-size: 1.15em; }
    .carousel-desc { font-size: 0.85em; }
    .carousel-arrow { width: 30px; height: 30px; font-size: 14px; }
    .carousel-prev { left: 6px; }
    .carousel-next { right: 6px; }
}


/* 海报下载按钮样式 */
.share-btn.share-poster {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.share-btn.share-poster:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

/* 海报模态框样式 */
.poster-modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.poster-modal-content {
    position: relative;
    background: white;
    margin: 5% auto;
    padding: 30px;
    width: 90%;
    max-width: 500px;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.poster-close {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 28px;
    font-weight: bold;
    color: #666;
    cursor: pointer;
    transition: color 0.3s;
}

.poster-close:hover {
    color: #333;
}

.poster-modal-content h3 {
    margin-top: 0;
    margin-bottom: 20px;
    color: #1e293b;
    font-size: 20px;
    text-align: center;
}

.poster-preview {
    margin-bottom: 20px;
    text-align: center;
}

.poster-preview img {
    max-height: 60vh;
    object-fit: contain;
}

.poster-actions {
    text-align: center;
}

.poster-download-btn {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    border: none;
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.poster-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.poster-download-btn i {
    font-size: 18px;
}


/*
.article-card { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--divider); align-items: flex-start; }
.article-card:last-child { border-bottom: none; }
.article-info { flex: 1; min-width: 0; }
.article-info h3 { margin: 0 0 4px 0; font-size: 1.05em; }
.article-info p { margin: 4px 0; color: var(--text-secondary); font-size: 0.9em; line-height: 1.4; }
.article-info small { color: var(--text-hint); font-size: 0.8em; }
.article-thumb { flex-shrink: 0; width: 100px; height: 100px; border-radius: 8px; overflow: hidden; order: 0; }
.article-thumb img.lazy-load { opacity: 0; }
.article-thumb img:not(.lazy-load) { opacity: 1; }

@media (max-width: 600px) {
    .article-card { flex-direction: row; }
    .article-thumb { width: 80px; height: 80px; }
}
/*