/* ========================================
   南风九九 nf99.cn - 自定义样式
   Theme: 薰衣草紫 + 雾霾蓝（梦幻森系）
   ======================================== */

/* ===== CSS 变量：日间模式（默认） ===== */
:root {
    /* 薰衣草紫 — 主色调，用于图标、按钮、链接、活跃状态 */
    --color-primary: #9b8ec4;
    --color-primary-light: #bdb3d9;
    --color-primary-dark: #7d6fb3;
    --color-primary-bg: #f7f5fb;
    --color-primary-border: #e8e3f3;

    /* 雾霾蓝 — 点缀色，用于渐变、标签、卡片描边 */
    --color-accent: #a4c2d4;
    --color-accent-light: #c6dae5;
    --color-accent-bg: #f4f8fa;
    --color-accent-border: #dce8f0;

    /* 基底 — 白色为主 */
    --color-bg: #fbfafd;
    --color-surface: #ffffff;
    --color-surface-hover: #f8f6fb;
    --color-text: #3d3848;
    --color-text-secondary: #736e80;
    --color-text-muted: #a59fb0;
    --color-border: #ebe7f2;

    --color-nav-bg: rgba(255, 255, 255, 0.88);
    --color-nav-border: rgba(155, 142, 196, 0.1);

    /* 双色渐变 — 用于 LOGO、装饰元素 */
    --gradient-brand: linear-gradient(135deg, #9b8ec4, #a4c2d4);
    --gradient-soft: linear-gradient(135deg, #f7f5fb, #f4f8fa);
    --gradient-card: linear-gradient(180deg, #faf9fd 0%, #f4f8fa 100%);

    --shadow-sm: 0 1px 3px rgba(155, 142, 196, 0.06), 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 14px rgba(155, 142, 196, 0.08), 0 2px 6px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 32px rgba(155, 142, 196, 0.1), 0 4px 12px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 56px rgba(155, 142, 196, 0.12), 0 8px 20px rgba(0, 0, 0, 0.05);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);

    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

/* ===== CSS 变量：夜间模式 ===== */
[data-theme="dark"] {
    --color-primary: #b8aed6;
    --color-primary-light: #d2cae6;
    --color-primary-dark: #8b7cc4;
    --color-primary-bg: #262236;
    --color-primary-border: #363050;

    --color-accent: #8aafc4;
    --color-accent-light: #6c95ab;
    --color-accent-bg: #1a252c;
    --color-accent-border: #253640;

    --color-bg: #13101a;
    --color-surface: #1d1a28;
    --color-surface-hover: #252236;
    --color-text: #e6e2f0;
    --color-text-secondary: #a69fb8;
    --color-text-muted: #726c82;
    --color-border: #2d2840;

    --color-nav-bg: rgba(19, 16, 26, 0.92);
    --color-nav-border: rgba(184, 174, 214, 0.1);

    --gradient-brand: linear-gradient(135deg, #b8aed6, #8aafc4);
    --gradient-soft: linear-gradient(135deg, #262236, #1a252c);
    --gradient-card: linear-gradient(180deg, #1d1a28 0%, #1a2228 100%);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.35);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.4);
}

/* ===== 全局基础 ===== */
* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    transition: background-color var(--transition), color var(--transition);
    overflow-x: hidden;
}

/* 页面背景装饰渐变 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse 80% 60% at 20% 10%, rgba(155, 142, 196, 0.06) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 85%, rgba(164, 194, 212, 0.06) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
    transition: opacity var(--transition);
}

[data-theme="dark"] body::before {
    background:
        radial-gradient(ellipse 80% 60% at 20% 10%, rgba(184, 174, 214, 0.04) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 85%, rgba(138, 175, 196, 0.04) 0%, transparent 60%);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-light);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-nav-border);
    transition: all var(--transition);
    height: 60px;
}

.navbar::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-brand);
    opacity: 0.15;
}

.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* 左侧 LOGO */
.nav-left {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.nav-logo {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--gradient-brand);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(155, 142, 196, 0.25);
}

.nav-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

/* 中间导航按钮 */
.nav-center {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-btn {
    padding: 7px 20px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    border: none;
    background: transparent;
    transition: all var(--transition-fast);
    white-space: nowrap;
    font-family: var(--font-sans);
}

.nav-btn:hover {
    color: var(--color-primary);
    background: var(--color-primary-bg);
}

.nav-btn.active {
    color: var(--color-primary);
    background: var(--color-primary-bg);
    font-weight: 600;
}

/* 右侧功能按钮 */
.nav-right {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.nav-icon-btn {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.nav-icon-btn:hover {
    color: var(--color-primary);
    background: var(--color-primary-bg);
}

/* 手机菜单按钮 */
.nav-mobile-toggle {
    display: none;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 20px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.nav-mobile-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* 移动端弹出菜单 */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 999;
    opacity: 0;
    transition: opacity var(--transition);
}

.mobile-menu-overlay.show {
    opacity: 1;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: 16px 24px;
    z-index: 1000;
    transform: translateY(-10px);
    opacity: 0;
    transition: all var(--transition);
}

.mobile-menu.show {
    transform: translateY(0);
    opacity: 1;
}

.mobile-menu-row {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.mobile-menu-row:last-child {
    margin-bottom: 0;
}

.mobile-menu-btn {
    flex: 1;
    min-width: 80px;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
    text-align: center;
}

.mobile-menu-btn:hover,
.mobile-menu-btn.active {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-bg);
}

.mobile-menu-divider {
    height: 1px;
    background: var(--color-border);
    margin: 12px 0;
}

/* ===== 主内容区 ===== */
.main-content {
    padding-top: 60px;
    min-height: calc(100vh - 300px);
    position: relative;
    z-index: 1;
}

.page-section {
    display: none;
    animation: fadeInUp 0.4s ease;
}

.page-section.active {
    display: block;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 24px;
}

/* ===== 通用组件样式 ===== */
.section-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title .icon {
    color: var(--color-primary);
    font-size: 26px;
}

.section-subtitle {
    font-size: 15px;
    color: var(--color-text-muted);
    margin-bottom: 32px;
}

/* 卡片 */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent-border);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

/* ===== 关于页面 ===== */

/* 个人信息区 */
.profile-header {
    display: flex;
    gap: 32px;
    align-items: flex-start;
    padding: 32px;
}

.profile-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--gradient-brand);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: #fff;
    flex-shrink: 0;
    box-shadow: 0 8px 28px rgba(155, 142, 196, 0.2);
}

.profile-info h2 {
    font-size: 26px;
    font-weight: 700;
    margin: 0 0 4px 0;
}

.profile-role {
    font-size: 15px;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 12px;
}

.profile-bio {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.profile-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.profile-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    border-radius: 20px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    font-size: 13px;
    border: 1px solid var(--color-primary-border);
}

/* PGP 公钥 */
.pgp-section {
    margin-top: 16px;
}

.pgp-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    background: var(--color-primary-bg);
    color: var(--color-primary);
    border: 1px solid var(--color-primary-border);
    font-size: 13px;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
}

.pgp-toggle:hover {
    background: var(--color-primary);
    color: #fff;
}

.pgp-content {
    display: none;
    position: relative;
    margin-top: 12px;
    padding: 16px;
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--color-text-secondary);
    max-height: 200px;
    overflow-y: auto;
}

.pgp-content.show {
    display: block;
}

.pgp-copy {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    font-size: 12px;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
    z-index: 2;
}

.pgp-copy:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-bg);
}

.pgp-copy.copied {
    border-color: #3fb950;
    color: #3fb950;
    background: #f0fdf4;
}

/* 个人信息面板 */
.info-panel-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

.info-panel-group {
    display: flex;
    flex-direction: column;
}

.info-panel-subtitle {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0 0 12px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--color-border);
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 14px;
}

.info-icon {
    font-size: 16px;
    width: 22px;
    text-align: center;
    flex-shrink: 0;
}

.info-label {
    color: var(--color-text-muted);
    font-size: 13px;
    min-width: 60px;
    flex-shrink: 0;
}

.info-value {
    color: var(--color-text);
    font-weight: 500;
}

/* 社交链接 */
.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 14px;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
    cursor: pointer;
}

.social-link:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-bg);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.social-link .icon {
    font-size: 20px;
    width: 24px;
    text-align: center;
}

/* 技能标签 */
.skills-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    padding: 8px 18px;
    border-radius: var(--radius-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    font-size: 14px;
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-bg);
    transform: translateY(-1px);
}

/* 技能面板 + 进度条 */
.skill-panels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.skill-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.skill-panel-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-muted);
    margin: 0 0 16px 0;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--color-border);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.skill-bar-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 0;
}

.skill-bar-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text);
    min-width: 76px;
    flex-shrink: 0;
}

.skill-bar-track {
    flex: 1;
    min-width: 60px;
    height: 8px;
    background: var(--color-border);
    border-radius: 4px;
    overflow: hidden;
}

.skill-bar-fill {
    display: block;
    height: 8px;
    background: linear-gradient(90deg, #9b8ec4, #a4c2d4);
    border-radius: 4px;
}

.skill-bar-pct {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    min-width: 34px;
    text-align: right;
    flex-shrink: 0;
}

.skill-group-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-muted);
    margin: 0 0 10px 0;
    padding-left: 2px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.skill-tag .level {
    font-size: 12px;
    color: var(--color-primary);
    margin-left: 6px;
}

/* Now Page */
.now-item {
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    gap: 14px;
}

.now-item:last-child {
    border-bottom: none;
}

.now-icon {
    font-size: 22px;
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.now-text h4 {
    font-size: 15px;
    font-weight: 600;
    margin: 0 0 4px 0;
}

.now-text p {
    font-size: 14px;
    color: var(--color-text-muted);
    margin: 0;
}

/* Uses Page */
.uses-item {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all var(--transition-fast);
}

.uses-item:hover {
    border-color: var(--color-primary-border);
}

.uses-icon {
    font-size: 20px;
    width: 30px;
    text-align: center;
}

.uses-name {
    font-weight: 500;
    font-size: 14px;
}

.uses-desc {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-left: auto;
}

/* ===== 作品页面 ===== */
.works-category {
    margin-bottom: 36px;
}

.works-category-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid transparent;
    border-image: var(--gradient-brand) 1;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.work-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
    cursor: pointer;
}

.work-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-border);
    transform: translateY(-4px);
}

.work-card-image {
    height: 160px;
    background: var(--gradient-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--color-primary);
    border-bottom: 1px solid var(--color-border);
}

.work-card-body {
    padding: 18px 20px;
}

.work-card-title {
    font-size: 17px;
    font-weight: 600;
    margin: 0 0 6px 0;
}

.work-card-desc {
    font-size: 14px;
    color: var(--color-text-muted);
    margin: 0 0 12px 0;
    line-height: 1.6;
}

.work-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.work-tag {
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    border: 1px solid var(--color-primary-border);
}

/* ===== 标签页导航（作品/分享/关于共用） ===== */
.tab-nav {
    display: flex;
    gap: 6px;
    margin-bottom: 24px;
    flex-wrap: wrap;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 0;
}

.tab-btn {
    padding: 8px 20px;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
    position: relative;
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: var(--color-primary);
    background: var(--color-primary-bg);
}

.tab-btn.active {
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-primary);
    font-weight: 600;
}

/* 关于页选项卡内容 */
.about-tab-content {
    display: none;
    animation: fadeInUp 0.3s ease;
}

.about-tab-content.active {
    display: block;
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 32px;
    flex-wrap: wrap;
}

.page-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

.page-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.page-btn.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.page-btn.disabled {
    opacity: 0.4;
    pointer-events: none;
}

/* ===== 分享页面：左垂直导航 + 右卡片 ===== */
.share-layout {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 28px;
    align-items: start;
}

/* 垂直导航树 */
.tree-nav {
    list-style: none;
    padding: 0;
    margin: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    overflow: hidden;
}

.tree-nav li {
    list-style: none;
}

.tree-nav a {
    display: block;
    padding: 10px 18px;
    font-size: 14px;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.tree-nav a:hover {
    color: var(--color-primary);
    background: var(--color-primary-bg);
}

/* 折叠树：一级父节点 */
.tree-parent {
    border-bottom: 1px solid var(--color-border);
}

.tree-parent:last-child {
    border-bottom: none;
}

.tree-toggle {
    font-weight: 600;
    display: flex !important;
    align-items: center;
    gap: 6px;
    user-select: none;
}

.tree-toggle .tree-arrow {
    font-size: 10px;
    width: 14px;
    text-align: center;
}

.tree-parent.open > .tree-toggle {
    color: var(--color-primary);
}

/* 折叠树：二级子节点 */
.tree-children {
    display: none;
    list-style: none;
    padding: 0;
    margin: 0;
    background: var(--color-bg);
}

.tree-parent.open > .tree-children {
    display: block;
}

.tree-child {
    padding-left: 38px !important;
    font-weight: 400;
    border-bottom: 1px solid var(--color-border);
}

.tree-child:last-child {
    border-bottom: none;
}

.tree-child.active {
    color: var(--color-primary);
    background: var(--color-primary-bg);
    font-weight: 600;
}

/* 右侧卡片区 */
.share-cards {
    min-height: 200px;
}

/* 分享卡片（统一） */
.share-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-card:hover {
    border-color: var(--color-primary-border);
    box-shadow: var(--shadow-sm);
    transform: translateX(4px);
}

.share-card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}

.share-card-desc {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 8px;
    line-height: 1.5;
}

.share-card-meta {
    font-size: 12px;
    color: var(--color-text-muted);
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.share-card-tag {
    padding: 2px 8px;
    border-radius: 10px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    font-size: 11px;
}

/* 博客列表 */
.blog-item {
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    gap: 14px;
    align-items: flex-start;
    transition: all var(--transition-fast);
}

.blog-item:hover {
    padding-left: 8px;
}

.blog-item:last-child {
    border-bottom: none;
}

.blog-date {
    font-size: 12px;
    color: var(--color-text-muted);
    white-space: nowrap;
    padding-top: 3px;
    min-width: 80px;
}

.blog-info h4 {
    font-size: 15px;
    font-weight: 500;
    margin: 0 0 4px 0;
}

.blog-info h4 a {
    color: var(--color-text);
}

.blog-info h4 a:hover {
    color: var(--color-primary);
}

.blog-meta {
    font-size: 12px;
    color: var(--color-text-muted);
}

/* 朋友圈 */
.moments-item {
    padding: 16px 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    transition: all var(--transition-fast);
}

.moments-item:hover {
    box-shadow: var(--shadow-sm);
}

.moments-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.moments-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-primary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--color-primary);
}

.moments-name {
    font-weight: 600;
    font-size: 14px;
}

.moments-time {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-left: auto;
}

.moments-content {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 10px;
}

.moments-tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 11px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
}

/* ===== CMD 终端 ===== */
.terminal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition);
}

.terminal-overlay.show {
    display: flex;
    opacity: 1;
}

.terminal-window {
    width: 90%;
    max-width: 800px;
    height: 75vh;
    max-height: 600px;
    background: #0d1117;
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid #30363d;
}

.terminal-header {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    background: #161b22;
    border-bottom: 1px solid #30363d;
    user-select: none;
}

.terminal-dots {
    display: flex;
    gap: 8px;
    margin-right: 16px;
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dot-red { background: #ff5f56; }
.terminal-dot-yellow { background: #ffbd2e; }
.terminal-dot-green { background: #27ca40; }

.terminal-title {
    font-size: 13px;
    color: #8b949e;
    flex: 1;
    text-align: center;
    font-family: var(--font-mono);
}

.terminal-close {
    color: #8b949e;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 18px;
    padding: 0 4px;
    transition: color 0.15s;
}

.terminal-close:hover {
    color: #ff5f56;
}

.terminal-body {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.6;
    color: #c9d1d9;
}

.terminal-body::-webkit-scrollbar {
    width: 6px;
}

.terminal-body::-webkit-scrollbar-track {
    background: transparent;
}

.terminal-body::-webkit-scrollbar-thumb {
    background: #30363d;
    border-radius: 3px;
}

.terminal-output {
    margin-bottom: 8px;
}

.terminal-line {
    padding: 2px 0;
}

.terminal-line .prompt {
    color: #a78bfa;
}

.terminal-line .cmd {
    color: #c9d1d9;
}

.terminal-line .output {
    color: #8b949e;
}

.terminal-line .error {
    color: #ff5f56;
}

.terminal-line .success {
    color: #3fb950;
}

.terminal-line .highlight {
    color: #58a6ff;
}

.terminal-input-line {
    display: flex;
    align-items: center;
    gap: 8px;
}

.terminal-prompt {
    color: #a78bfa;
    white-space: nowrap;
    user-select: none;
}

.terminal-input {
    flex: 1;
    background: transparent;
    border: none;
    color: #c9d1d9;
    font-family: var(--font-mono);
    font-size: 14px;
    outline: none;
    caret-color: #a78bfa;
}

/* 搜索弹窗 */
.search-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1500;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
    opacity: 0;
    transition: opacity var(--transition);
}

.search-overlay.show {
    display: flex;
    opacity: 1;
}

.search-box {
    width: 90%;
    max-width: 560px;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.search-input-wrap {
    display: flex;
    align-items: center;
    padding: 14px 18px;
    border-bottom: 1px solid var(--color-border);
    gap: 10px;
}

.search-input-wrap .icon {
    font-size: 18px;
    color: var(--color-text-muted);
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 16px;
    color: var(--color-text);
    outline: none;
    font-family: var(--font-sans);
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.search-results {
    padding: 12px 18px;
    max-height: 300px;
    overflow-y: auto;
}

.search-result-item {
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-result-item:hover {
    color: var(--color-primary);
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-empty {
    text-align: center;
    padding: 24px;
    color: var(--color-text-muted);
    font-size: 14px;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: 48px 24px 24px;
    margin-top: 60px;
    position: relative;
    z-index: 1;
}

/* ===== 页脚三栏栅格 ===== */
.footer-grid {
    max-width: 960px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 40px;
}

.footer-grid-col h4 {
    font-size: 15px;
    font-weight: 600;
    margin: 0 0 16px 0;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-more {
    font-size: 12px;
    font-weight: 400;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
    white-space: nowrap;
    margin-left: auto;
}

.footer-more:hover {
    color: var(--color-primary);
}

/* 更新日志列表 */
.footer-changelog {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-cl-item {
    display: flex;
    gap: 12px;
    align-items: baseline;
    font-size: 13px;
    line-height: 1.5;
}

.footer-cl-date {
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    font-size: 12px;
    white-space: nowrap;
    min-width: 52px;
}

.footer-cl-text {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.footer-cl-item:hover .footer-cl-text {
    color: var(--color-primary);
}

/* 统计卡片 — 2x2 长方形卡片，高度对齐更新日志 */
.footer-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.footer-stat {
    padding: 10px 14px;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.footer-stat:hover {
    border-color: var(--color-accent-border);
    background: var(--color-accent-bg);
}

.footer-stat-num {
    display: block;
    font-size: 18px;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1.2;
    font-family: var(--font-sans);
}

.footer-stat-unit {
    font-weight: 400;
    font-size: 13px;
}

.footer-stat-label {
    display: block;
    font-size: 11px;
    color: var(--color-text-muted);
    margin-top: 2px;
}

/* 技术栈列表 — 去掉分隔线，对齐更新日志布局 */
.footer-tech-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-tech-item {
    display: flex;
    gap: 12px;
    align-items: baseline;
    font-size: 13px;
    line-height: 1.5;
    padding: 0;
    border-bottom: none;
}

.footer-tech-item:last-child {
    border-bottom: none;
}

.footer-tech-name {
    color: var(--color-text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.footer-tech-label {
    color: var(--color-text-muted);
    font-size: 12px;
    padding: 0;
    border-radius: 0;
    background: transparent;
    border: none;
    margin-left: auto;
    text-align: right;
}

.footer-bottom {
    max-width: 960px;
    margin: 36px auto 0;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--color-text-muted);
}

.footer-bottom-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-bottom-links a {
    font-size: 13px;
    color: var(--color-text-muted);
}

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

/* ===== 配套页面弹窗 ===== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1500;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition);
}

.modal-overlay.show {
    display: flex;
    opacity: 1;
}

.modal {
    width: 90%;
    max-width: 700px;
    max-height: 80vh;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 1px solid var(--color-border);
}

.modal-title {
    font-size: 18px;
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--color-text-secondary);
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--color-primary-bg);
    color: var(--color-primary);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    line-height: 1.8;
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* 统计图表占位 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    text-align: center;
    padding: 20px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.stat-bar {
    height: 8px;
    background: var(--color-border);
    border-radius: 4px;
    margin-top: 8px;
    overflow: hidden;
}

.stat-bar-fill {
    height: 100%;
    background: var(--gradient-brand);
    border-radius: 4px;
    transition: width 1s ease;
}

/* ===== 回到顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-brand);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition);
    z-index: 900;
    pointer-events: none;
}

.back-to-top.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.back-to-top:hover {
    background: var(--color-primary-light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .navbar-inner {
        padding: 0 16px;
    }

    .nav-center,
    .nav-right {
        display: none;
    }

    .nav-mobile-toggle {
        display: flex;
    }

    .mobile-menu-overlay,
    .mobile-menu {
        display: block;
    }

    .profile-header {
        flex-direction: column;
        text-align: center;
        align-items: center;
        padding: 24px;
    }

    .profile-meta {
        justify-content: center;
    }

    .social-links {
        justify-content: center;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .works-grid {
        grid-template-columns: 1fr;
    }

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

    .container {
        padding: 24px 16px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .info-panel-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .share-layout {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .skill-panels {
        grid-template-columns: 1fr;
    }

    .skill-bar-name {
        min-width: 60px;
        font-size: 12px;
    }

    .tree-nav {
        border-radius: var(--radius-sm);
    }

    .tree-toggle {
        font-size: 13px;
        padding: 10px 14px !important;
    }

    .tree-child {
        padding-left: 32px !important;
        font-size: 13px;
    }

    .terminal-window {
        width: 100%;
        height: 85vh;
        max-height: none;
        border-radius: 0;
    }

    .modal {
        width: 95%;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .footer-bottom-links {
        justify-content: center;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .share-tabs {
        flex-direction: column;
    }

    .share-tab {
        text-align: center;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .blog-date {
        min-width: 60px;
        font-size: 11px;
    }
}