/* ============================================================
   CSS 变量 —— 靛石绿（深邃墨韵）
   ============================================================ */
:root {
    --bg-body: #f2f6fc;
    --bg-card: #ffffff;
    --bg-navbar: rgba(255, 255, 255, 0.72);
    --bg-search: #f1f5f9;
    --bg-search-focus: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-sm: 0 8px 32px -12px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 12px 40px -12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 60px -16px rgba(0, 0, 0, 0.10);
    --icon-color: #475569;
    --tag-bg: #eef2ff;
    --tag-border: #e2e8f0;
    --footer-border: #f1f5f9;
    --badge-tutorial: #fce7f3;
    --badge-tutorial-color: #be185d;
    --slide-overlay: linear-gradient(0deg, rgba(0, 0, 0, 0.5) 0%, rgba(0, 0, 0, 0.1) 80%);
    --transition-speed: 0.35s;
    --content-padding: 100px;
    --max-content-width: 1700px;
    --back-top-bottom: 30px;
    --back-top-right: 30px;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;

    --border-focus: #2A5A5A;
    --gradient-btn: linear-gradient(135deg, #2A5A5A, #0F2626);
    --icon-hover-bg: rgba(42, 90, 90, 0.12);
    --icon-hover-color: #2A5A5A;
    --tag-color: #2A5A5A;
    --badge-software: #dbeafe;
    --badge-software-color: #0F2626;
    --badge-recommend: #d1fae5;
    --badge-recommend-color: #0F2626;
    --body-radial-1: rgba(42, 90, 90, 0.07);
    --body-radial-2: rgba(15, 38, 38, 0.05);
    --footer-logo-gradient: linear-gradient(135deg, #2A5A5A, #0F2626);
    --footer-link-hover: #2A5A5A;
    --copyright-gradient: linear-gradient(135deg, #2A5A5A, #0F2626);
    --btn-shadow: rgba(42, 90, 90, 0.3);
    --btn-shadow-hover: rgba(42, 90, 90, 0.4);
    --search-focus-shadow: rgba(42, 90, 90, 0.15);
    --reward-gradient: linear-gradient(135deg, #f97316, #f59e0b);
    --reward-shadow: rgba(249, 115, 22, 0.4);
    --reward-shadow-hover: rgba(249, 115, 22, 0.55);
}

[data-theme="dark"] {
    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --bg-navbar: rgba(15, 23, 42, 0.75);
    --bg-search: #1e293b;
    --bg-search-focus: #1e293b;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --shadow-sm: 0 8px 32px -12px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 12px 40px -12px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 20px 60px -16px rgba(0, 0, 0, 0.7);
    --icon-color: #94a3b8;
    --tag-bg: #1e293b;
    --tag-border: #334155;
    --footer-border: #334155;
    --badge-tutorial: #4c1d3b;
    --badge-tutorial-color: #f472b6;
    --slide-overlay: linear-gradient(0deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.2) 80%);

    --border-focus: #5A9A9A;
    --gradient-btn: linear-gradient(135deg, #5A9A9A, #2A5A5A);
    --icon-hover-bg: rgba(90, 154, 154, 0.15);
    --icon-hover-color: #5A9A9A;
    --tag-color: #5A9A9A;
    --badge-software: #134e4a;
    --badge-software-color: #5A9A9A;
    --badge-recommend: #1a3a2a;
    --badge-recommend-color: #5A9A9A;
    --body-radial-1: rgba(90, 154, 154, 0.07);
    --body-radial-2: rgba(42, 90, 90, 0.05);
    --footer-logo-gradient: linear-gradient(135deg, #5A9A9A, #2A5A5A);
    --footer-link-hover: #5A9A9A;
    --copyright-gradient: linear-gradient(135deg, #5A9A9A, #2A5A5A);
    --btn-shadow: rgba(90, 154, 154, 0.3);
    --btn-shadow-hover: rgba(90, 154, 154, 0.4);
    --search-focus-shadow: rgba(90, 154, 154, 0.15);
    --reward-gradient: linear-gradient(135deg, #fb923c, #fbbf24);
    --reward-shadow: rgba(251, 146, 60, 0.4);
    --reward-shadow-hover: rgba(251, 146, 60, 0.55);
}

/* ============================================================
   全局样式
   ============================================================ */
body {
    font-family: var(--font-family);
    background: var(--bg-body);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background var(--transition-speed) ease, color var(--transition-speed) ease;
    background-image:
        radial-gradient(circle at 80% 10%, var(--body-radial-1) 0%, transparent 40%),
        radial-gradient(circle at 20% 90%, var(--body-radial-2) 0%, transparent 40%);
    background-attachment: fixed;
    opacity: 1;
}
body.fade-in {
    animation: fadeIn 0.5s ease forwards;
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html,
body {
    overflow-x: hidden;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
[role="button"]:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
    border-radius: 4px;
}
.top-actions .icon-btn:focus-visible {
    outline-offset: 0;
}
.hero-slider:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: -2px;
}

/* ============================================================
   顶部导航（统一头部，通过 body 类控制）
   ============================================================ */
.top-bar {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: calc(var(--max-content-width) + var(--content-padding) * 2);
    z-index: 999;
    padding: 14px var(--content-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    pointer-events: none;
    background: transparent;
    box-shadow: none;
    border-bottom: none;
    border-radius: 0 0 20px 20px;
    transition: background var(--transition-speed) ease, box-shadow var(--transition-speed) ease, border-color var(--transition-speed) ease;
}
.top-bar nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    pointer-events: auto;
}

/* 滚动后或内容页默认状态：有背景 */
.top-bar.scrolled {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(16px) saturate(180%);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}
[data-theme="dark"] .top-bar.scrolled {
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

/* ★★★ 内容页导航默认有背景 ★★★ */
.page-article .top-bar {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(16px) saturate(180%);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}
[data-theme="dark"] .page-article .top-bar {
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.top-bar .logo-link {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    text-decoration: none;
}
.top-bar .logo-img {
    height: 2.2rem;
    width: auto;
    display: block;
    transition: opacity 0.3s ease;
}
.top-bar.scrolled .logo-img {
    height: 2rem;
}
@media (max-width: 768px) {
    .top-bar .logo-img {
        height: 1.8rem;
    }
    .top-bar.scrolled .logo-img {
        height: 1.6rem;
    }
}
@media (max-width: 480px) {
    .top-bar .logo-img {
        height: 1.4rem;
    }
    .top-bar.scrolled .logo-img {
        height: 1.2rem;
    }
}

.top-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.top-actions .icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 60px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(8px);
    color: #fff;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s ease;
    flex-shrink: 0;
    text-decoration: none;
}
.top-actions .icon-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}
.top-bar.scrolled .top-actions .icon-btn,
.page-article .top-actions .icon-btn {
    color: var(--text-primary);
    border-color: var(--border-color);
    background: var(--bg-card);
}
.top-bar.scrolled .top-actions .icon-btn:hover,
.page-article .top-actions .icon-btn:hover {
    background: var(--icon-hover-bg);
    color: var(--icon-hover-color);
}
[data-theme="dark"] .top-bar.scrolled .top-actions .icon-btn,
[data-theme="dark"] .page-article .top-actions .icon-btn {
    color: var(--text-primary);
    border-color: var(--border-color);
    background: rgba(255, 255, 255, 0.06);
}
[data-theme="dark"] .top-bar.scrolled .top-actions .icon-btn:hover,
[data-theme="dark"] .page-article .top-actions .icon-btn:hover {
    background: var(--icon-hover-bg);
    color: var(--icon-hover-color);
}

@media (max-width: 768px) {
    .top-bar {
        padding: 10px 16px;
        border-radius: 0;
    }
    .top-bar.scrolled,
    .page-article .top-bar {
        background: var(--bg-navbar);
        backdrop-filter: blur(16px) saturate(180%);
        border-bottom: 1px solid var(--border-color);
        border-radius: 0;
    }
    .top-actions .icon-btn {
        width: 34px;
        height: 34px;
        font-size: 0.95rem;
        background: var(--icon-hover-bg);
        color: var(--icon-color);
        border-color: var(--border-color);
    }
    .top-bar.scrolled .top-actions .icon-btn,
    .page-article .top-actions .icon-btn {
        background: var(--bg-card);
        color: var(--text-primary);
        border-color: var(--border-color);
    }
}
@media (max-width: 480px) {
    .top-bar {
        padding: 6px 10px;
    }
    .top-actions .icon-btn {
        width: 28px;
        height: 28px;
        font-size: 0.75rem;
    }
}

/* ============================================================
   首页特有：轮播样式
   ============================================================ */
.hero-wrapper {
    position: relative;
    width: 100%;
    margin-left: 0;
    height: 60vh;
    min-height: 380px;
    max-height: 700px;
    overflow: hidden;
    background: #0f172a;
    margin-top: 0;
}
.hero-wrapper::before {
    content: '';
    display: block;
    height: 70px;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 5;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.2) 0%, transparent 100%);
    pointer-events: none;
}
@media (max-width: 768px) {
    .hero-wrapper::before {
        height: 56px;
    }
}
@media (max-width: 480px) {
    .hero-wrapper::before {
        height: 44px;
    }
    .hero-wrapper {
        min-height: 280px;
        max-height: 420px;
        height: 45vh;
    }
}

.hero-slider {
    position: relative;
    width: 100%;
    height: 100%;
    outline: none;
}
.hero-slider:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: -2px;
}

.hero-slides {
    display: flex;
    width: 100%;
    height: 100%;
    transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.hero-slide {
    min-width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: flex-start;
    padding: 50px var(--content-padding) 80px;
    overflow: hidden;
}
.hero-slide .slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
    background-color: #1e293b;
}
.hero-slide::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--slide-overlay);
    z-index: 1;
    transition: background var(--transition-speed) ease;
}
.hero-content {
    position: relative;
    z-index: 2;
    color: #fff;
    max-width: 1000px;
}
.hero-content h2 {
    font-size: 2.6rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 10px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
    word-break: break-word;
}
.hero-content h2 a {
    color: #fff;
    text-decoration: none;
    transition: 0.2s;
}
.hero-content h2 a:hover {
    color: var(--border-focus);
    text-decoration: underline;
}
.hero-content p {
    font-size: 1.1rem;
    opacity: 0.92;
    line-height: 1.6;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
    max-width: 800px;
    word-break: break-word;
}

@media (max-width: 1400px) {
    .hero-content { max-width: 900px; }
    .hero-content p { max-width: 720px; }
}
@media (max-width: 1200px) {
    .hero-content { max-width: 800px; }
    .hero-content p { max-width: 640px; }
}
@media (max-width: 992px) {
    .hero-content { max-width: 700px; }
    .hero-content p { max-width: 560px; }
}
@media (max-width: 768px) {
    .hero-wrapper {
        height: 50vh;
        min-height: 320px;
        max-height: 500px;
    }
    .hero-content h2 {
        font-size: 2rem;
    }
    .hero-content p {
        font-size: 1rem;
        max-width: 100%;
    }
    .hero-content {
        max-width: 100%;
    }
    .hero-slide {
        padding: 30px 40px 70px;
    }
}
@media (max-width: 480px) {
    .hero-content h2 {
        font-size: 1.4rem;
    }
    .hero-content p {
        font-size: 0.9rem;
    }
    .hero-slide {
        padding: 20px 20px 60px;
    }
}

.hero-controls {
    position: absolute;
    bottom: 16px;
    right: var(--content-padding);
    z-index: 10;
    display: flex;
    gap: 8px;
    align-items: center;
}
.hero-controls .hero-btn {
    width: 44px;
    height: 44px;
    font-size: 1.1rem;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 60px;
    color: #fff;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-controls .hero-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.08);
}
.hero-controls .pause-btn {
    width: 40px;
    height: 40px;
    font-size: 1rem;
}
@media (max-width: 768px) {
    .hero-controls {
        bottom: 12px;
        right: var(--content-padding);
        gap: 6px;
    }
    .hero-controls .hero-btn {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    .hero-controls .pause-btn {
        width: 32px;
        height: 32px;
        font-size: 0.85rem;
    }
}
@media (max-width: 480px) {
    .hero-controls {
        bottom: 10px;
        right: var(--content-padding);
        gap: 4px;
    }
    .hero-controls .hero-btn {
        width: 30px;
        height: 30px;
        font-size: 0.75rem;
    }
    .hero-controls .pause-btn {
        width: 28px;
        height: 28px;
        font-size: 0.7rem;
    }
}

.hero-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}
.hero-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.35);
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    padding: 0;
}
.hero-dots .dot.active {
    width: 32px;
    background: #fff;
}

/* ============================================================
   内容区通用
   ============================================================ */
.content-full {
    width: 100%;
    margin-left: 0;
    padding: 20px var(--content-padding) 0;
    background: var(--bg-body);
    transition: background var(--transition-speed) ease;
}
.content-inner {
    max-width: var(--max-content-width);
    margin: 0 auto;
    display: flex;
    gap: 36px;
    align-items: flex-start;
}
.content-left {
    flex: 0 0 80%;
    min-width: 0;
}

/* ============================================================
   首页特有：分类标题
   ============================================================ */
.category-header {
    max-width: var(--max-content-width);
    margin: 0 auto 28px;
    padding: 0 0 16px;
    border-bottom: 2px solid var(--border-color);
    transition: border-color var(--transition-speed) ease;
}
.category-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    margin-bottom: 6px;
}
.category-header .category-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 70%;
}
@media (max-width: 768px) {
    .category-header h1 {
        font-size: 1.4rem;
    }
    .category-header .category-desc {
        font-size: 0.85rem;
        max-width: 100%;
    }
}

/* ============================================================
   面包屑导航（内容页）
   ============================================================ */
.breadcrumb-nav {
    max-width: var(--max-content-width);
    margin: 0 auto 28px;
    padding: 0 0 16px;
    border-bottom: 2px solid var(--border-color);
    transition: border-color var(--transition-speed) ease;
}
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    padding: 0;
    margin: 0;
    list-style: none;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.breadcrumb-item+.breadcrumb-item::before {
    content: "›";
    padding: 0 8px;
    color: var(--text-muted);
}
.breadcrumb-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}
.breadcrumb-item a:hover {
    color: var(--border-focus);
}
.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

/* ============================================================
   街镇导航
   ============================================================ */
.town-nav-wrapper {
    width: 100%;
    padding: 0;
    background: transparent;
    margin-bottom: 30px;
}
.town-nav-inner {
    max-width: 100%;
    padding: 0;
}
.town-nav-inner .tag-nav-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 6px 8px;
}
.town-nav-inner .tag-nav-grid a {
    display: block;
    font-size: 0.72rem;
    font-weight: 400;
    color: var(--border-focus);
    text-decoration: none;
    text-align: center;
    padding: 4px 0;
    border-radius: 4px;
    transition: all 0.2s ease;
    line-height: 1.5;
    background: rgba(42, 90, 90, 0.08);
    border: 1px solid rgba(42, 90, 90, 0.15);
}
.town-nav-inner .tag-nav-grid a:hover {
    color: #ffffff;
    background: var(--border-focus);
    border-color: var(--border-focus);
    font-weight: 500;
    transform: translateY(-1px);
}
@media (max-width: 992px) {
    .town-nav-inner .tag-nav-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}
@media (max-width: 768px) {
    .town-nav-wrapper {
        margin-bottom: 20px;
    }
    .town-nav-inner .tag-nav-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}
@media (max-width: 480px) {
    .town-nav-wrapper {
        margin-bottom: 14px;
    }
    .town-nav-inner .tag-nav-grid {
        display: flex;
        flex-wrap: wrap;
        gap: 4px 6px;
        justify-content: center;
    }
    .town-nav-inner .tag-nav-grid a {
        flex: 0 0 auto;
        padding: 2px 8px;
        font-size: 0.7rem;
        white-space: nowrap;
        border-radius: 10px;
        background: rgba(42, 90, 90, 0.08);
        border: 1px solid rgba(42, 90, 90, 0.15);
    }
    .town-nav-inner .tag-nav-grid a:hover {
        color: #ffffff;
        background: var(--border-focus);
        border-color: var(--border-focus);
    }
}

/* ============================================================
   推广位
   ============================================================ */
.banner-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 30px;
}
.banner-row .banner-item {
    height: 160px;
    border-radius: 12px;
    overflow: hidden;
    background: transparent;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
    position: relative;
}
.banner-row .banner-item:hover {
    transform: scale(1.02);
}
.sponsor-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
    background-size: 400% 400%;
    animation: sponsorShimmer 1.8s ease-in-out infinite;
    position: relative;
    overflow: hidden;
}
.sponsor-placeholder img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: relative;
    z-index: 1;
}
@keyframes sponsorShimmer {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
.sponsor-badge {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    color: #fff;
    font-size: 0.55rem;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 20px;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    z-index: 3;
    pointer-events: none;
}
[data-theme="dark"] .sponsor-placeholder {
    background: linear-gradient(135deg, #1e293b 25%, #2a3a5a 50%, #1e293b 75%);
}
@media (max-width: 992px) {
    .banner-row .banner-item {
        height: 130px;
    }
}
@media (max-width: 768px) {
    .banner-row .banner-item {
        height: 110px;
    }
}
@media (max-width: 480px) {
    .banner-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .banner-row .banner-item {
        height: 90px;
    }
}

/* ============================================================
   首页特有：文章列表 & 分页
   ============================================================ */
.post-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.post-card-sm {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    flex-direction: column;
    min-width: 0;
}
.post-card-sm:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: var(--border-focus);
}
.post-thumb-wrapper {
    position: relative;
    overflow: hidden;
    background: var(--border-color);
}
.post-thumb-wrapper .post-thumb {
    display: block;
    width: 100%;
    aspect-ratio: 2/1;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.post-card-sm:hover .post-thumb-wrapper .post-thumb {
    transform: scale(1.08);
}

.post-thumb-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 8px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(12px);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 2;
}
[data-theme="dark"] .post-thumb-info {
    background: rgba(0, 0, 0, 0.5);
}

/* ★★★ 修改：文章卡片分类标签样式（去掉类名，直接匹配 a 标签） ★★★ */
.post-thumb-info a {
    font-size: 0.6rem;
    font-weight: 600;
    color: #fff;
    letter-spacing: 0.3px;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
    text-decoration: none;
    transition: opacity 0.2s;
}
.post-thumb-info a:hover {
    opacity: 0.8;
}

.post-thumb-info .post-date-on-image {
    font-size: 0.6rem;
    color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    gap: 4px;
}
.post-thumb-info .post-date-on-image i {
    font-size: 0.5rem;
    opacity: 0.7;
}

.post-card-sm .post-body {
    padding: 12px 14px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}
.post-card-sm .post-body h3.post-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0;
}
.post-card-sm .post-body h3.post-title a {
    color: inherit;
    text-decoration: none;
    transition: 0.2s;
}
.post-card-sm .post-body h3.post-title a:hover {
    color: var(--border-focus);
}
.post-excerpt {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-top: 2px;
}

.pagination-wrap {
    max-width: var(--max-content-width);
    margin: 30px auto 0;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex-wrap: wrap;
}
.pagination a,
.pagination .current {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 12px;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
}
.pagination a:hover {
    background: var(--icon-hover-bg);
    color: var(--icon-hover-color);
    border-color: var(--border-focus);
}
.pagination .current {
    background: var(--gradient-btn);
    color: #fff;
    border-color: transparent;
    cursor: default;
}
.pagination .prev-next {
    gap: 6px;
}
.pagination .prev-next i {
    font-size: 0.7rem;
}
.pagination .dots {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ============================================================
   内容页特有：文章正文
   ============================================================ */
.page-article .content-full {
    padding-top: 80px;
}
@media (max-width: 768px) {
    .page-article .content-full {
        padding-top: 70px;
    }
}
@media (max-width: 480px) {
    .page-article .content-full {
        padding-top: 60px;
    }
}

.article-wrapper {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 40px 48px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
    transition: all var(--transition-speed) ease;
}
[data-theme="dark"] .article-wrapper {
    background: var(--bg-card);
}

.post-article h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}
.post-article .post-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding-bottom: 20px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}
.post-article .post-meta i {
    margin-right: 4px;
}
.post-article .post-body {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text-primary);
}
.post-article .post-body p {
    text-indent: 2em;
    margin-bottom: 1.2em;
}
.post-article .post-body h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 1.8em 0 0.8em;
    padding-bottom: 0.3em;
    border-bottom: 2px solid var(--border-color);
}
.post-article .post-body h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 1.5em 0 0.6em;
}

/* ---- 内容页图片样式（纯 img，无任何自定义属性） ---- */
.post-article .post-body img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 24px auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}
.post-article .post-body img:hover {
    transform: scale(1.01);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}
.post-article .post-body .img-caption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: -16px;
    margin-bottom: 20px;
}

/* ---- 引用样式 ---- */
.post-article .post-body blockquote {
    margin: 1.5em 0;
    padding: 16px 20px;
    border-radius: 8px;
    font-style: normal;
    position: relative;
    background: var(--bg-body);
    border-left: 6px solid var(--border-color);
    transition: all 0.2s ease;
}
.post-article .post-body blockquote p {
    text-indent: 0;
    margin-bottom: 0;
}
.post-article .post-body blockquote cite {
    display: block;
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: right;
}
.post-article .post-body blockquote.quote-blue {
    border-left-color: #3b82f6;
    background: rgba(59, 130, 246, 0.08);
}
.post-article .post-body blockquote.quote-green {
    border-left-color: #10b981;
    background: rgba(16, 185, 129, 0.08);
}
.post-article .post-body blockquote.quote-purple {
    border-left-color: #8b5cf6;
    background: rgba(139, 92, 246, 0.08);
}
.post-article .post-body blockquote.quote-red {
    border-left-color: #ef4444;
    background: rgba(239, 68, 68, 0.08);
}
.post-article .post-body blockquote.quote-theme {
    border-left-color: var(--border-focus);
    background: rgba(42, 90, 90, 0.08);
}
.post-article .post-body blockquote.quote-block {
    border-left-color: #f59e0b;
    background: rgba(245, 158, 11, 0.08);
    padding-left: 48px;
}
.post-article .post-body blockquote.quote-block::before {
    content: "\201C";
    font-size: 3rem;
    font-family: Georgia, serif;
    color: var(--border-focus);
    position: absolute;
    left: 12px;
    top: 4px;
    line-height: 1;
}
.post-article .post-body blockquote.quote-gray {
    border-left: none;
    background: var(--bg-body);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
}
.post-article .post-body blockquote.quote-gray cite {
    color: var(--text-muted);
}

/* ---- 下载按钮 ---- */
.download-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin: 24px 0 8px;
    justify-content: center;
}
.download-btn {
    display: inline-block;
    padding: 10px 28px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #fff;
    border-radius: 60px;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
    border: none;
    cursor: pointer;
}
.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(37, 99, 235, 0.45);
    color: #fff;
}
.download-btn.word {
    background: linear-gradient(135deg, #0f7b3a, #0a5c2b);
    box-shadow: 0 4px 14px rgba(15, 123, 58, 0.35);
}
.download-btn.word:hover {
    box-shadow: 0 8px 28px rgba(15, 123, 58, 0.45);
}

/* ---- 版权信息 + 打赏 ---- */
.copyright-notice {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px 16px;
    padding: 16px 20px;
    background: var(--bg-body);
    border-radius: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    border-left: 4px solid var(--border-focus);
    margin: 20px 0 0;
    transition: border-color var(--transition-speed) ease;
}
.copyright-notice .copy-text {
    flex: 1;
    min-width: 180px;
}
.copyright-notice .copy-text a {
    color: var(--border-focus);
    text-decoration: none;
}
.copyright-notice .copy-text a:hover {
    text-decoration: underline;
}
.reward-btn-inline {
    display: inline-block;
    padding: 8px 24px;
    background: var(--reward-gradient);
    color: #fff;
    border-radius: 60px;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px var(--reward-shadow);
    border: none;
    cursor: pointer;
    flex-shrink: 0;
}
.reward-btn-inline:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 24px var(--reward-shadow-hover);
    color: #fff;
}
.reward-btn-inline i {
    color: #fff;
    margin-right: 4px;
}

/* ---- 相关文章（内容页） ---- */
.related-posts {
    margin-top: 30px;
}

/* ============================================================
   侧边栏（首页 + 内容页共用）
   ============================================================ */
.content-right {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.content-right>* {
    margin-bottom: 0;
}

.search-section {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 14px 16px 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-speed) ease;
}
.search-section .search-wrapper {
    display: flex;
    align-items: center;
    background: var(--bg-search);
    border-radius: 60px;
    padding: 2px 2px 2px 16px;
    border: 1.5px solid var(--border-color);
    transition: all var(--transition-speed) cubic-bezier(0.25, 0.46, 0.45, 0.94);
    width: 100%;
    position: relative;
}
.search-section .search-wrapper:focus-within {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--search-focus-shadow);
    background: var(--bg-search-focus);
}
.search-section .search-wrapper input {
    border: none;
    outline: none;
    background: transparent;
    font-size: 0.8rem;
    padding: 8px 0;
    color: var(--text-primary);
    width: 100%;
    font-family: var(--font-family);
}
.search-section .search-wrapper input::placeholder {
    color: var(--text-muted);
}
.search-section .search-wrapper .search-btn {
    border: none;
    background: var(--gradient-btn);
    color: #fff;
    padding: 6px 14px 6px 12px;
    border-radius: 60px;
    cursor: pointer;
    font-size: 0.7rem;
    font-weight: 500;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
    flex-shrink: 0;
    font-family: var(--font-family);
}
.search-section .search-wrapper .search-btn:hover {
    transform: scale(1.03);
    box-shadow: 0 4px 12px var(--btn-shadow);
}
.hot-search {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px 8px;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}
.hot-search .label {
    font-size: 0.6rem;
    font-weight: 600;
    color: var(--text-muted);
}
.hot-search a {
    font-size: 0.6rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 1px 8px;
    border-radius: 40px;
    background: var(--tag-bg);
    border: 1px solid var(--tag-border);
    transition: all 0.2s ease;
}
.hot-search a:hover {
    color: var(--border-focus);
    border-color: var(--border-focus);
}

.banner-search {
    height: 160px;
    border-radius: 12px;
    overflow: hidden;
    background: transparent;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
    width: 100%;
    position: relative;
}
.banner-search:hover {
    transform: scale(1.02);
}
.banner-recommend {
    height: 200px;
    border-radius: 12px;
    overflow: hidden;
    background: transparent;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
    width: 100%;
    position: relative;
}
.banner-recommend:hover {
    transform: scale(1.02);
}
@media (max-width: 992px) {
    .banner-search { height: 130px; }
    .banner-recommend { height: 160px; }
}
@media (max-width: 768px) {
    .banner-search { height: 110px; }
    .banner-recommend { height: 130px; }
}
@media (max-width: 480px) {
    .banner-search { height: auto; aspect-ratio: 414 / 90; }
    .banner-recommend { height: auto; aspect-ratio: 414 / 100; }
}

.module-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 16px 18px 14px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-speed) ease;
}
.module-card .module-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.module-card .module-title .icon-fire {
    color: #f59e0b;
}
.module-card .module-title .icon-star {
    color: #8b5cf6;
}

.hot-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.hot-item {
    padding: 8px 8px;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.25s ease;
    border-radius: 6px;
    margin: 0 -8px;
}
.hot-item:last-child {
    border-bottom: none;
    padding-bottom: 4px;
}
.hot-item:first-child {
    padding-top: 4px;
}
.hot-item:hover {
    background: var(--icon-hover-bg);
    padding-left: 12px;
}
.hot-item:hover a {
    color: var(--border-focus);
}
.hot-item a {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.25s ease;
    line-height: 1.6;
    word-break: break-word;
    display: inline;
}
.hot-item-date {
    font-size: 0.6rem;
    color: var(--text-muted);
    white-space: nowrap;
    margin-left: 6px;
    display: inline;
}

.rec-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.rec-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.25s ease;
    border-radius: 6px;
    padding-left: 6px;
    padding-right: 6px;
    margin: 0 -6px;
}
.rec-item:last-child {
    border-bottom: none;
}
.rec-item .rec-link {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.25s ease;
    border-radius: 6px;
}
.rec-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    background: var(--bg-card);
}
.rec-item:hover .rec-title {
    color: var(--border-focus);
}
.rec-item .rec-thumb {
    flex-shrink: 0;
    width: 56px;
    height: 36px;
    object-fit: cover;
    background: var(--border-color);
    border-radius: 8px;
    transition: opacity 0.3s;
    display: block;
}
.rec-item:hover .rec-thumb {
    opacity: 0.88;
}
.rec-item .rec-title {
    font-size: 0.78rem;
    font-weight: 500;
    line-height: 1.4;
    word-break: break-word;
    transition: color 0.25s ease;
}

.tag-cloud-right {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 14px 16px 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-speed) ease;
}
.tag-cloud-right .tag-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.tag-cloud-right .tag-title i {
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.tag-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px 12px;
}
.tag-grid a {
    display: block;
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--text-secondary);
    text-decoration: none;
    text-align: center;
    padding: 4px 0;
    transition: color 0.2s ease;
    line-height: 1.5;
    will-change: font-weight;
}
.tag-grid a:hover {
    color: var(--border-focus);
    font-weight: 700;
    text-shadow: 0 0 0.01px currentColor;
}

/* ============================================================
   灯箱样式（内容页）
   ============================================================ */
.image-preview-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
    cursor: pointer;
}
.image-preview-modal.active {
    display: flex;
}
.preview-container {
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    cursor: default;
    position: relative;
}
.preview-image {
    max-width: 100vw;
    max-height: 100vh;
    object-fit: contain;
    border-radius: 0;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    user-select: none;
    cursor: grab;
    transition: none;
    display: block;
}
.preview-image:active {
    cursor: grabbing;
}
.preview-close {
    position: fixed;
    top: 20px;
    right: 30px;
    font-size: 2rem;
    color: #fff;
    cursor: pointer;
    z-index: 10000;
    opacity: 0.8;
    transition: opacity 0.2s;
    line-height: 1;
    font-weight: 300;
}
.preview-close:hover {
    opacity: 1;
}
.preview-controls {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10000;
    background: rgba(0, 0, 0, 0.5);
    padding: 8px 16px;
    border-radius: 40px;
    backdrop-filter: blur(8px);
}
.preview-controls button {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 6px 16px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background 0.2s;
    font-family: inherit;
}
.preview-controls button:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ============================================================
   页脚
   ============================================================ */
.footer-wrap {
    width: 100%;
    margin-left: 0;
    padding: 30px var(--content-padding) 20px;
    background: var(--bg-body);
    transition: background var(--transition-speed) ease;
    position: relative;
}
.footer {
    max-width: var(--max-content-width);
    margin: 0 auto;
    background: var(--bg-card);
    border-radius: 24px;
    padding: 36px 40px 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1.4fr 1.4fr 1.4fr;
    gap: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--footer-border);
}
.footer-about .logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    background: var(--footer-logo-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.footer-about p {
    color: var(--text-secondary);
    margin-top: 10px;
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 280px;
}
.footer-about .social-links {
    margin-top: 16px;
    display: flex;
    gap: 12px;
}
.footer-about .social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 60px;
    background: var(--tag-bg);
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: 0.2s;
    text-decoration: none;
}
.footer-about .social-links a.weixin:hover { background: #07c160; color: #fff; }
.footer-about .social-links a.qq:hover { background: #12b7f5; color: #fff; }
.footer-about .social-links a.weibo:hover { background: #ff8200; color: #fff; }
.footer-about .social-links a.email:hover { background: #ea4335; color: #fff; }

.footer-links h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.footer-links h4 i {
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.link-column {
    display: grid;
    grid-template-rows: repeat(4, auto);
    grid-auto-flow: column;
    gap: 4px 16px;
    align-items: start;
}
.link-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    padding: 4px 0;
    transition: 0.2s;
    line-height: 1.6;
    white-space: nowrap;
    max-width: 100%;
}
.link-column a:hover {
    color: var(--footer-link-hover);
    padding-left: 4px;
}

.footer-bottom {
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}
.footer-slogan {
    flex: 0 0 auto;
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.3px;
    font-weight: 400;
}
.footer-slogan i {
    margin-right: 4px;
    opacity: 0.6;
}
.footer-copyright {
    flex: 1 1 auto;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
    padding: 0 12px;
}
.footer-copyright span a {
    background: var(--copyright-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    text-decoration: none;
    position: relative;
    transition: filter 0.3s ease;
    font-size: 0.9rem;
}
.footer-copyright span a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--copyright-gradient);
    transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    -webkit-text-fill-color: initial;
}
.footer-copyright span a:hover {
    filter: drop-shadow(0 0 12px var(--btn-shadow));
}
.footer-copyright span a:hover::after {
    width: 100%;
}
.footer-license {
    flex: 0 0 auto;
    color: var(--text-muted);
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
}
.footer-license img {
    display: inline-block;
    vertical-align: middle;
}
.footer-license a {
    color: var(--text-muted);
    text-decoration: none;
    transition: 0.2s;
}
.footer-license a:hover {
    color: var(--footer-link-hover);
}
.footer-license .sep {
    color: var(--border-color);
    padding: 0 2px;
}

/* ============================================================
   返回顶部
   ============================================================ */
.back-to-top {
    position: fixed;
    bottom: var(--back-top-bottom);
    right: var(--back-top-right);
    z-index: 999;
    width: 44px;
    height: 44px;
    border-radius: 60px;
    background: var(--gradient-btn);
    color: #fff;
    border: none;
    font-size: 1.1rem;
    cursor: pointer;
    box-shadow: 0 4px 20px var(--btn-shadow);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    text-decoration: none;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    transform: translateY(-3px) scale(1.04);
    box-shadow: 0 8px 30px var(--btn-shadow-hover);
}
.back-to-top:active {
    transform: scale(0.94);
}
@media (max-width: 768px) {
    .back-to-top { width: 38px; height: 38px; font-size: 0.95rem; bottom: 20px; right: 20px; }
}
@media (max-width: 480px) {
    .back-to-top { width: 34px; height: 34px; font-size: 0.85rem; bottom: 16px; right: 16px; }
}

/* ============================================================
   响应式（共用）
   ============================================================ */
@media (max-width: 1800px) { :root { --max-content-width: 1600px; } }
@media (max-width: 1600px) { :root { --max-content-width: 1400px; } }
@media (max-width: 1400px) {
    :root { --content-padding: 60px; }
    .article-wrapper { padding: 32px 36px; }
    .post-grid-4 { gap: 14px; }
    .post-card-sm .post-body { padding: 12px 14px 12px; }
    .post-card-sm .post-body h3.post-title { font-size: 0.82rem; }
    .post-excerpt { font-size: 0.7rem; }
}
@media (max-width: 1200px) {
    :root { --content-padding: 40px; }
    :root { --max-content-width: 1200px; }
    .article-wrapper { padding: 28px 30px; }
}

@media (max-width: 992px) {
    .content-inner { flex-direction: column; gap: 30px; }
    .content-left { flex: 1; width: 100%; }
    .content-right { width: 100%; flex-direction: row; flex-wrap: wrap; gap: 24px; }
    .content-right>* { flex: 1 1 280px; min-width: 260px; max-width: 100%; margin-bottom: 0; }
    .post-grid-4 { grid-template-columns: repeat(2, 1fr); gap: 18px; }
    .tag-grid { grid-template-columns: repeat(4, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
    .article-wrapper { padding: 24px 20px; }
    .post-article h1 { font-size: 1.6rem; }
    .post-article .post-body { font-size: 1rem; }
    .copyright-notice { flex-wrap: wrap; }
    .reward-btn-inline { font-size: 0.85rem; padding: 6px 18px; }
}

@media (max-width: 768px) {
    :root { --content-padding: 20px; --max-content-width: 100%; }
    .content-full { padding: 20px var(--content-padding) 0; }
    .page-article .content-full { padding-top: 70px; }
    .post-grid-4 { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .content-right { flex-direction: column; }
    .content-right>* { flex: 1 1 100%; min-width: unset; }
    .tag-grid { grid-template-columns: repeat(4, 1fr); }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer { padding: 24px 20px 16px; }
    .footer-bottom { flex-direction: column; align-items: center; gap: 8px; }
    .link-column { grid-template-rows: repeat(4, auto) !important; grid-auto-flow: column !important; gap: 4px 12px !important; }
    .link-column a { font-size: 0.8rem; padding: 4px 0; white-space: nowrap !important; }
    .link-column a:hover { padding-left: 2px; }
    .article-wrapper { padding: 20px 16px; }
    .post-article h1 { font-size: 1.4rem; }
    .post-article .post-body blockquote { padding: 12px 16px; }
    .post-article .post-body blockquote.quote-block { padding-left: 36px; }
    .post-article .post-body blockquote.quote-block::before { font-size: 2.4rem; left: 8px; }
    .copyright-notice { flex-direction: column; align-items: flex-start; gap: 10px; }
    .reward-btn-inline { align-self: flex-start; font-size: 0.85rem; padding: 6px 18px; }
    .breadcrumb-nav { margin-bottom: 20px; }
}

@media (max-width: 480px) {
    * { max-width: 100%; }
    .content-full { width: 100%; margin-left: 0; padding: 12px 8px 0; overflow: hidden; }
    .page-article .content-full { padding-top: 60px; }
    .content-inner { flex-direction: column; gap: 14px; overflow: hidden; }
    .post-grid-4 { grid-template-columns: 1fr; gap: 12px; }
    .post-card-sm .post-thumb { aspect-ratio: 16/9; }
    .post-card-sm .post-body h3.post-title { font-size: 0.95rem; }
    .post-excerpt { font-size: 0.8rem; }

    .hot-item a { font-size: 0.85rem; }
    .hot-item-date { font-size: 0.6rem; }
    .rec-item .rec-title { font-size: 0.85rem; }
    .module-card .module-title { font-size: 0.9rem; }

    .tag-grid { display: flex; flex-wrap: wrap; gap: 6px 10px; justify-content: center; }
    .tag-grid a { flex: 0 0 auto; padding: 2px 10px; text-align: center; background: var(--tag-bg); border-radius: 20px; border: 1px solid var(--tag-border); font-size: 0.8rem; white-space: nowrap; transition: color 0.2s ease, text-shadow 0.2s ease; will-change: font-weight; }
    .tag-grid a:hover { color: var(--border-focus); font-weight: 700; text-shadow: 0 0 0.01px currentColor; }

    .breadcrumb-nav { margin-bottom: 16px; }
    .breadcrumb { font-size: 0.8rem; }

    .search-section .search-wrapper { padding: 2px 2px 2px 10px; border-radius: 40px; }
    .search-section .search-wrapper input { font-size: 0.9rem; padding: 6px 0; min-width: 60px; }
    .search-section .search-wrapper input::placeholder { font-size: 0.85rem; }
    .search-section .search-wrapper .search-btn { padding: 5px 10px 5px 8px; font-size: 0.8rem; }
    .hot-search { gap: 4px 6px; padding-top: 6px; margin-top: 6px; }
    .hot-search .label { font-size: 0.6rem; }
    .hot-search a { font-size: 0.65rem; padding: 1px 6px; }

    .module-card { padding: 10px 12px 8px; border-radius: 16px; }
    .module-card .module-title { font-size: 0.8rem; margin-bottom: 6px; }
    .hot-item { padding: 5px 0; }
    .hot-item a { font-size: 0.85rem; }
    .hot-item-date { font-size: 0.6rem; margin-left: 3px; }
    .rec-item { padding: 5px 0; gap: 8px; }
    .rec-item .rec-thumb { width: 40px; height: 28px; }
    .rec-item .rec-title { font-size: 0.85rem; }

    .tag-cloud-right { padding: 8px 10px; border-radius: 16px; }
    .tag-cloud-right .tag-title { font-size: 0.8rem; margin-bottom: 6px; }

    .article-wrapper { padding: 16px 12px; border-radius: 16px; }
    .post-article h1 { font-size: 1.2rem; }
    .post-article .post-meta { font-size: 0.75rem; gap: 10px; padding-bottom: 14px; margin-bottom: 16px; }
    .post-article .post-body { font-size: 0.95rem; }
    .post-article .post-body blockquote { padding: 10px 12px; margin: 1em 0; }
    .post-article .post-body blockquote.quote-block { padding-left: 28px; }
    .post-article .post-body blockquote.quote-block::before { font-size: 2rem; left: 6px; }
    .download-group { flex-direction: column; align-items: center; }
    .download-btn { width: 100%; text-align: center; padding: 10px 16px; font-size: 0.9rem; }
    .copyright-notice { font-size: 0.8rem; padding: 12px 14px; flex-direction: column; align-items: flex-start; gap: 10px; }
    .reward-btn-inline { font-size: 0.85rem; padding: 6px 18px; width: 100%; text-align: center; }

    .footer-wrap { padding: 12px 8px 8px; }
    .footer { padding: 16px 12px 12px; border-radius: 12px; }
    .footer-grid { gap: 16px; }
    .footer-about .logo { font-size: 1.2rem; }
    .footer-about p { font-size: 0.85rem; max-width: 100%; }
    .footer-about .social-links a { width: 32px; height: 32px; font-size: 0.9rem; }
    .footer-links h4 { font-size: 0.85rem; margin-bottom: 8px; }
    .link-column { grid-template-rows: repeat(4, auto) !important; grid-auto-flow: column !important; gap: 2px 8px !important; }
    .link-column a { font-size: 0.8rem; padding: 2px 0; white-space: nowrap !important; }
    .link-column a:hover { padding-left: 2px; }
    .footer-slogan { font-size: 0.85rem; }
    .footer-copyright { font-size: 0.9rem; }
    .footer-copyright span a { font-size: 0.9rem; }
    .footer-license { font-size: 0.75rem; gap: 4px; justify-content: center; }
    .footer-license img { width: 16px; height: 16px; }

    .post-thumb-info { padding: 4px 8px; }
    .post-thumb-info a { font-size: 0.5rem; }
    .post-thumb-info .post-date-on-image { font-size: 0.5rem; }
    .post-card-sm .post-body { padding: 8px 10px 10px; }
    .post-card-sm .post-body h3.post-title { font-size: 0.95rem; }
    .post-excerpt { font-size: 0.8rem; }
}
/* ============================================================
   ★★★ 列表页专属样式（page-list）★★★
   覆盖 .post-grid-4 和 .post-thumb 的默认样式
   ============================================================ */
body.page-list .post-grid-4 {
    grid-template-columns: repeat(8, 1fr);
}

body.page-list .post-thumb {
    aspect-ratio: 1 / 2;   /* 竖图：宽高比 1:2 */
}

/* 列表页卡片内部布局保持 flex 列 */
body.page-list .post-card-sm {
    display: flex;
    flex-direction: column;
}
body.page-list .post-thumb-wrapper {
    flex-shrink: 0;
}
body.page-list .post-body {
    flex: 1;
}

/* 响应式：逐步减少列数 */
@media (max-width: 1400px) {
    body.page-list .post-grid-4 {
        grid-template-columns: repeat(6, 1fr);
    }
}
@media (max-width: 1200px) {
    body.page-list .post-grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}
@media (max-width: 768px) {
    body.page-list .post-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 480px) {
    body.page-list .post-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}
/* 极端小屏（宽度 < 360px）回退为单列 */
@media (max-width: 359px) {
    body.page-list .post-grid-4 {
        grid-template-columns: 1fr;
    }
}
/* 重置友情链接列表样式，去掉小圆点 */
.link-column {
    list-style: none;
    padding: 0;
    margin: 0;
}
.link-column li {
    list-style: none;
    margin: 0;
    padding: 0;
}
/* === 修复页脚链接点击区域过宽 === */
.link-column a {
    justify-self: start;        /* 左对齐，宽度由内容决定 */
    display: inline-block;      /* 防止拉伸 */
    width: fit-content;         /* 宽度自适应内容 */
    max-width: 100%;
    padding: 2px 0;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.2s ease;
    line-height: 1.6;
}
.link-column a:hover {
    color: var(--footer-link-hover);
    padding-left: 4px;
}