/* ===================================
   mjdbjgs.com — Premium Design System
   版本：1.0 (2026-09-20)
   定位：AI 技术站的高级感统一层
   用法：在所有既有 CSS 之后引入，用变量 + 精修覆盖实现全站统一
   设计原则：克制的深色底 + 单一强调色 + 大留白 + 精细阴影 + 流体排版
   =================================== */

/* ========== 1. 设计令牌（Design Tokens）========== */
:root {
    /* — 强调色：单一薰衣草紫，替换原来的双色渐变混乱 — */
    --primary-start: #6366f1;
    --primary-end: #8b5cf6;
    --primary-dark: #4f46e5;
    --primary-light: #a5b4fc;

    /* — 辅助色：压低饱和度，只做点缀 — */
    --accent-blue: #3b82f6;
    --accent-cyan: #22d3ee;
    --accent-purple: #8b5cf6;
    --accent-pink: #f472b6;
    --accent-green: #10b981;
    --accent-amber: #f59e0b;

    /* — 中性色：偏冷的高级灰 — */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-light: #f8fafc;

    /* — 背景：极淡的冷白，不是纯白 — */
    --bg-primary: #ffffff;
    --bg-secondary: #fafbfc;
    --bg-tertiary: #f1f5f9;
    --bg-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);

    /* — 精细阴影：多层叠加，带色调 — */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .04), 0 1px 3px rgba(15, 23, 42, .06);
    --shadow-md: 0 2px 4px rgba(15, 23, 42, .04), 0 4px 12px rgba(15, 23, 42, .06);
    --shadow-lg: 0 4px 8px rgba(15, 23, 42, .04), 0 12px 28px rgba(15, 23, 42, .08);
    --shadow-xl: 0 8px 16px rgba(15, 23, 42, .06), 0 24px 48px rgba(15, 23, 42, .12);
    --shadow-glow: 0 0 0 1px rgba(99, 102, 241, .12), 0 8px 32px rgba(99, 102, 241, .16);
    --shadow-glow-hover: 0 0 0 1px rgba(99, 102, 241, .2), 0 16px 48px rgba(99, 102, 241, .24);

    /* — 圆角：统一节奏 — */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* — 过渡：用回弹曲线替代 ease — */
    --transition-fast: .15s cubic-bezier(.4, 0, .2, 1);
    --transition-base: .28s cubic-bezier(.4, 0, .2, 1);
    --transition-slow: .45s cubic-bezier(.4, 0, .2, 1);

    /* — 排版 — */
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
                 "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB",
                 "Microsoft YaHei", "Noto Sans SC", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", ui-monospace,
                 Menlo, Consolas, "Liberation Mono", monospace;

    /* — 版心 — */
    --content-max: 1200px;
    --content-wide: 1400px;

    /* — 描边 — */
    --border-subtle: 1px solid rgba(15, 23, 42, .07);
    --border-color: rgba(15, 23, 42, .09);
}

/* ========== 2. 深色模式 ========== */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #e8ecf4;
        --text-secondary: #94a3b8;
        --text-muted: #64748b;
        --text-light: #0f172a;

        --bg-primary: #0f1420;
        --bg-secondary: #0a0e17;
        --bg-tertiary: #1a2131;

        --primary-light: #818cf8;

        --border-subtle: 1px solid rgba(255, 255, 255, .07);
        --border-color: rgba(255, 255, 255, .1);

        --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
        --shadow-md: 0 2px 6px rgba(0, 0, 0, .35), 0 6px 16px rgba(0, 0, 0, .3);
        --shadow-lg: 0 6px 16px rgba(0, 0, 0, .4), 0 16px 40px rgba(0, 0, 0, .35);
        --shadow-xl: 0 12px 32px rgba(0, 0, 0, .5), 0 32px 64px rgba(0, 0, 0, .4);
        --shadow-glow: 0 0 0 1px rgba(129, 140, 248, .2), 0 8px 32px rgba(99, 102, 241, .2);
        --shadow-glow-hover: 0 0 0 1px rgba(129, 140, 248, .3), 0 16px 48px rgba(99, 102, 241, .3);
    }
}

/* ========== 3. 排版精修 ========== */
body {
    font-family: var(--font-sans);
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.75;
    font-feature-settings: "kern" 1, "liga" 1, "cv11" 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* 标题：收紧字距 + 流体字号，这是"高级感"的核心 */
h1, .hero h1, .skills-hero h1 {
    font-size: clamp(1.9rem, 4vw, 3rem) !important;
    font-weight: 800;
    letter-spacing: -.03em;
    line-height: 1.18;
}

h2, .section-title, .tools h2, .articles h2, .videos h2,
.ai-assistant h2, .support h2, .wechat h2 {
    font-size: clamp(1.45rem, 2.6vw, 2.05rem) !important;
    font-weight: 700;
    letter-spacing: -.022em;
    line-height: 1.25;
}

h3, .article-card h3, .video-info h3, .tool-info h3, .skill-title {
    font-weight: 650;
    letter-spacing: -.015em;
    line-height: 1.35;
}

p, li { letter-spacing: -.003em; }

code, pre, kbd, samp { font-family: var(--font-mono); }

/* 正文内的链接：细下划线，只在 hover 加深 */
.article-card p a, .article-content a:not(.read-more) {
    color: var(--primary-dark);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    text-decoration-color: rgba(99, 102, 241, .35);
    transition: text-decoration-color var(--transition-fast);
}
.article-card p a:hover, .article-content a:not(.read-more):hover {
    text-decoration-color: currentColor;
}

/* ========== 4. 导航：更精致 ========== */
header {
    background: rgba(255, 255, 255, .72) !important;
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--border-subtle) !important;
    box-shadow: none !important;
    transition: background var(--transition-base), border-color var(--transition-base);
}
header.scrolled {
    background: rgba(255, 255, 255, .9) !important;
    box-shadow: 0 1px 0 rgba(15, 23, 42, .05) !important;
}
@media (prefers-color-scheme: dark) {
    header { background: rgba(10, 14, 23, .72) !important; }
    header.scrolled { background: rgba(10, 14, 23, .92) !important; }
}

nav { height: 68px !important; max-width: var(--content-wide); }

.logo a {
    font-weight: 800 !important;
    font-size: 1.28rem !important;
    letter-spacing: -.03em;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links { gap: 4px !important; }

.nav-links a {
    font-size: .92rem;
    font-weight: 520;
    color: var(--text-secondary);
    padding: 8px 14px !important;
    border-radius: var(--radius-full);
    transition: color var(--transition-fast), background var(--transition-fast);
}
.nav-links a:after { display: none !important; }        /* 去掉旧下划线 */
.nav-links a:hover {
    color: var(--text-primary);
    background: rgba(99, 102, 241, .07);
}
.nav-links a.active {
    color: var(--primary-dark) !important;
    background: rgba(99, 102, 241, .1);
    font-weight: 600;
}
@media (prefers-color-scheme: dark) {
    .nav-links a:hover { background: rgba(129, 140, 248, .12); }
    .nav-links a.active { color: var(--primary-light) !important; background: rgba(129, 140, 248, .16); }
}

/* ========== 5. Hero：从"渐变大色块"改为"暗场 + 光晕" ========== */
.hero, .skills-hero {
    position: relative;
    background: #0b0f1a !important;
    color: #fff !important;
    padding: clamp(72px, 11vw, 132px) 24px !important;
    overflow: hidden;
    isolation: isolate;
}
/* 极光光晕（比旋转光斑高级得多） */
.hero::before, .skills-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(58% 62% at 22% 8%, rgba(99, 102, 241, .34) 0%, transparent 62%),
        radial-gradient(48% 56% at 82% 22%, rgba(139, 92, 246, .3) 0%, transparent 60%),
        radial-gradient(52% 60% at 52% 108%, rgba(34, 211, 238, .16) 0%, transparent 62%);
    filter: blur(6px);
    z-index: -1;
    animation: auroraShift 22s ease-in-out infinite alternate;
    pointer-events: none;
}
/* 细网格纹理，增加"技术感" */
.hero::after, .skills-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, .028) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .028) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 78% 68% at 50% 42%, #000 32%, transparent 76%);
    -webkit-mask-image: radial-gradient(ellipse 78% 68% at 50% 42%, #000 32%, transparent 76%);
    z-index: -1;
    pointer-events: none;
}

@keyframes auroraShift {
    0%   { transform: translate3d(0, 0, 0) scale(1); opacity: .92; }
    100% { transform: translate3d(2%, -2.5%, 0) scale(1.09); opacity: 1; }
}

/* 旧版的旋转光斑动画关掉 */
.hero:before { animation: none; }

.hero-content { max-width: 780px !important; }

.hero h1, .skills-hero h1 {
    color: #fff !important;
    text-shadow: 0 2px 24px rgba(0, 0, 0, .35) !important;
    margin-bottom: 22px !important;
}
.hero p, .skills-hero p {
    font-size: clamp(1rem, 1.55vw, 1.18rem) !important;
    color: rgba(255, 255, 255, .78) !important;
    line-height: 1.75;
    margin-bottom: 32px !important;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}
.hero h1 strong, .hero strong { color: #fff; }

/* ========== 6. 按钮 ========== */
.btn {
    padding: 13px 30px !important;
    border-radius: var(--radius-full) !important;
    font-weight: 600 !important;
    font-size: .95rem;
    letter-spacing: -.01em;
    transition: transform var(--transition-fast), box-shadow var(--transition-base), background var(--transition-fast) !important;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.btn-primary {
    background: #fff !important;
    color: #0b0f1a !important;
    box-shadow: 0 1px 2px rgba(0, 0, 0, .18), 0 8px 24px rgba(0, 0, 0, .18);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, .2), 0 14px 36px rgba(99, 102, 241, .3) !important;
}
.btn-secondary {
    background: rgba(255, 255, 255, .1) !important;
    color: #fff !important;
    border: 1px solid rgba(255, 255, 255, .22) !important;
    backdrop-filter: blur(8px);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, .18) !important;
    border-color: rgba(255, 255, 255, .38) !important;
    transform: translateY(-2px);
}

/* ========== 7. 区块节奏 ========== */
section, .ai-assistant, .articles, .videos, .tools, .support, .wechat {
    padding: clamp(56px, 7vw, 96px) 24px !important;
}

.section-title, .tools h2, .articles h2, .videos h2, .ai-assistant h2 {
    margin-bottom: 12px !important;
}
.section-desc, .tools > p, .articles > p, .videos > p, .ai-assistant > p {
    color: var(--text-secondary) !important;
    font-size: clamp(.95rem, 1.3vw, 1.06rem);
    max-width: 620px;
    margin: 0 auto 44px !important;
    line-height: 1.7;
}

/* 区块背景交替：制造呼吸感 */
.ai-assistant { background: var(--bg-primary) !important; }
.articles { background: var(--bg-secondary) !important; }
.videos { background: var(--bg-primary) !important; }
.tools { background: var(--bg-primary) !important; }

/* ========== 8. 卡片：统一高级质感 ========== */
.article-card, .tool-card, .ai-feature, .skill-card, .video-card {
    background: var(--bg-primary) !important;
    border: var(--border-subtle) !important;
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow-sm) !important;
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base) !important;
}
/* 悬浮：微升 + 强调色描边 + 柔和光晕 */
.article-card:hover, .tool-card:hover, .ai-feature:hover, .skill-card:hover, .video-card:hover {
    transform: translateY(-4px) !important;
    border-color: rgba(99, 102, 241, .28) !important;
    box-shadow: var(--shadow-glow-hover) !important;
}

/* 卡片内边距更宽松 */
.article-card { padding: 28px !important; }
.skill-card { border-left: none !important; padding: 26px !important; }
.tool-card { padding: 18px 20px !important; }

/* 卡片标题 hover 用强调色 */
.article-card h3 a:hover, .skill-title, .tool-info h3 { color: var(--text-primary); }
.article-card h3 a:hover { color: var(--primary-dark) !important; }

/* ========== 9. 标签 Tag ========== */
.tag, .skill-tag {
    border-radius: var(--radius-full) !important;
    font-size: .72rem !important;
    font-weight: 600 !important;
    letter-spacing: .01em;
    padding: 5px 12px !important;
    border: 1px solid transparent;
}
.tag-beginner { background: rgba(16, 185, 129, .12) !important; color: #047857 !important; border-color: rgba(16, 185, 129, .22) !important; }
.tag-advanced { background: rgba(245, 158, 11, .12) !important; color: #b45309 !important; border-color: rgba(245, 158, 11, .22) !important; }
.tag-project  { background: rgba(59, 130, 246, .12) !important; color: #1d4ed8 !important; border-color: rgba(59, 130, 246, .22) !important; }
.tag-new      { background: rgba(99, 102, 241, .12) !important; color: #4338ca !important; border-color: rgba(99, 102, 241, .22) !important; }
.tag-hot      { background: rgba(244, 63, 94, .12) !important; color: #be123c !important; border-color: rgba(244, 63, 94, .22) !important; }
.skill-tag    { background: var(--bg-tertiary) !important; color: var(--text-secondary) !important; border-color: var(--border-subtle) !important; }

@media (prefers-color-scheme: dark) {
    .tag-beginner { color: #34d399 !important; }
    .tag-advanced { color: #fbbf24 !important; }
    .tag-project  { color: #60a5fa !important; }
    .tag-new      { color: #a5b4fc !important; }
    .tag-hot      { color: #fb7185 !important; }
}

/* meta 信息行 */
.meta, .skill-meta {
    color: var(--text-muted) !important;
    font-size: .82rem !important;
    gap: 14px !important;
    letter-spacing: .005em;
}

/* read-more：箭头微移 */
.read-more {
    color: var(--primary-dark) !important;
    font-weight: 620 !important;
    font-size: .9rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap var(--transition-fast), color var(--transition-fast);
}
.read-more:hover { gap: 11px !important; color: var(--primary-start) !important; }
@media (prefers-color-scheme: dark) { .read-more { color: var(--primary-light) !important; } }

/* ========== 10. 页脚 ========== */
footer {
    background: var(--bg-primary) !important;
    border-top: var(--border-subtle) !important;
    padding: 48px 24px !important;
    color: var(--text-muted) !important;
    font-size: .88rem;
    line-height: 2;
}
footer .footer-links a {
    color: var(--text-secondary) !important;
    font-size: .88rem !important;
    margin: 0 6px !important;
    transition: color var(--transition-fast);
}
footer .footer-links a:hover { color: var(--primary-dark) !important; }
footer a { color: var(--text-secondary) !important; }
footer p { margin-bottom: 4px !important; }
footer .beian a { color: var(--text-muted) !important; font-size: .82rem; }
footer .beian a:hover { color: var(--primary-dark) !important; }

/* ========== 11. 广告位：贴紧新设计语言 ========== */
.ad-card {
    color: inherit;
    border: var(--border-subtle) !important;
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow-sm) !important;
    background: var(--bg-primary) !important;
}
.ad-card:hover {
    transform: translateY(-3px) !important;
    border-color: rgba(99, 102, 241, .25) !important;
    box-shadow: var(--shadow-glow) !important;
}
.ad-badge {
    border-radius: var(--radius-full) !important;
    font-size: .66rem !important;
    letter-spacing: .06em;
    padding: 4px 9px !important;
    background: rgba(15, 23, 42, .55) !important;
    color: #fff !important;
}
.ad-slot { margin: 32px auto !important; }

/* ========== 12. 支持/打赏区：暗场统一 ========== */
.support, .wechat {
    background: #0b0f1a !important;
    color: #fff !important;
    position: relative;
    overflow: hidden;
}
.support::before, .wechat::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(60% 70% at 50% 0%, rgba(99, 102, 241, .22) 0%, transparent 65%);
    pointer-events: none;
}
.support h2, .wechat h2 { color: #fff !important; }
.support > p, .wechat > p { color: rgba(255, 255, 255, .72) !important; }
.support-card {
    background: rgba(255, 255, 255, .05) !important;
    border: 1px solid rgba(255, 255, 255, .1) !important;
    border-radius: var(--radius-lg) !important;
    backdrop-filter: blur(12px);
    transition: transform var(--transition-base), background var(--transition-base), border-color var(--transition-base) !important;
}
.support-card:hover {
    transform: translateY(-4px) !important;
    background: rgba(255, 255, 255, .09) !important;
    border-color: rgba(255, 255, 255, .2) !important;
    box-shadow: 0 20px 48px rgba(0, 0, 0, .4) !important;
}
.support-card h3 { color: #fff; }
.support-card p { color: rgba(255, 255, 255, .7); }

/* ========== 13. 滚动出场动画 ========== */
@media (prefers-reduced-motion: no-preference) {
    .article-card, .tool-card, .ai-feature, .skill-card, .video-card, .support-card {
        animation: riseIn .6s cubic-bezier(.16, 1, .3, 1) both;
    }
    .article-card:nth-child(2), .tool-card:nth-child(2), .ai-feature:nth-child(2) { animation-delay: .05s; }
    .article-card:nth-child(3), .tool-card:nth-child(3), .ai-feature:nth-child(3) { animation-delay: .1s; }
    .article-card:nth-child(4), .tool-card:nth-child(4), .ai-feature:nth-child(4) { animation-delay: .15s; }
    .article-card:nth-child(5), .tool-card:nth-child(5), .ai-feature:nth-child(5) { animation-delay: .2s; }
    .article-card:nth-child(6) { animation-delay: .25s; }
    .article-card:nth-child(n+7) { animation-delay: .3s; }
}

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

/* 焦点可见性（无障碍） */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
    outline: 2px solid var(--primary-start);
    outline-offset: 2px;
    border-radius: 6px;
}

/* ========== 14. 选中文本 ========== */
::selection { background: rgba(99, 102, 241, .24); color: inherit; }

/* ========== 15. 滚动条（桌面端）========== */
@media (min-width: 1024px) {
    ::-webkit-scrollbar { width: 10px; height: 10px; }
    ::-webkit-scrollbar-track { background: transparent; }
    ::-webkit-scrollbar-thumb {
        background: rgba(100, 116, 139, .28);
        border-radius: var(--radius-full);
        border: 2px solid transparent;
        background-clip: content-box;
    }
    ::-webkit-scrollbar-thumb:hover { background: rgba(100, 116, 139, .48); background-clip: content-box; }
}

/* ========== 16. 正文排版（文章页）========== */
.article-page,
.article-content, .article-body, .post-content, .content article {
    font-size: 1.04rem;
    line-height: 1.88;
    color: var(--text-primary);
}
.article-page {
    max-width: 760px !important;
    margin: 56px auto !important;
    padding: 0 24px !important;
}
.article-page h1 {
    font-size: clamp(1.7rem, 3.2vw, 2.4rem) !important;
    line-height: 1.25 !important;
    letter-spacing: -.028em;
    margin-bottom: 14px !important;
    color: var(--text-primary) !important;
}
.article-page .meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
    padding-bottom: 22px;
    margin-bottom: 34px !important;
    border-bottom: var(--border-subtle);
    color: var(--text-muted) !important;
    font-size: .85rem !important;
}
.article-page h2, .article-content h2, .article-body h2, .post-content h2 {
    margin-top: 2.2em;
    margin-bottom: .7em;
    padding-bottom: .35em;
    border-bottom: var(--border-subtle);
    color: var(--text-primary) !important;
    font-size: clamp(1.3rem, 2.2vw, 1.6rem) !important;
    letter-spacing: -.02em;
}
.article-page h3, .article-content h3, .article-body h3, .post-content h3 {
    margin-top: 1.7em;
    margin-bottom: .55em;
    color: var(--text-primary) !important;
    font-size: clamp(1.08rem, 1.6vw, 1.22rem) !important;
}
.article-page p, .article-content p, .article-body p, .post-content p {
    margin-bottom: 1.15em;
    color: var(--text-secondary) !important;
}
.article-page p strong, .article-page li strong { color: var(--text-primary); font-weight: 650; }
.article-page ul, .article-page ol {
    margin: .9em 0 1.3em 1.5em !important;
}
.article-page li, .article-content li, .article-body li {
    margin-bottom: .5em;
    color: var(--text-secondary) !important;
    line-height: 1.85 !important;
}
.article-content img, .article-body img, .article-page img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    max-width: 100%;
    height: auto;
}

/* 正文内链接：重点修复（原本是浏览器默认蓝 rgb(0,0,238)）*/
.article-page a:not(.back-link):not(.read-more):not(.tag):not(.btn),
.article-content a:not(.read-more), .article-body a:not(.read-more) {
    color: var(--primary-dark) !important;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    text-decoration-color: rgba(99, 102, 241, .35);
    transition: text-decoration-color var(--transition-fast), color var(--transition-fast);
}
.article-page a:not(.back-link):not(.read-more):not(.tag):not(.btn):hover,
.article-content a:not(.read-more):hover, .article-body a:not(.read-more):hover {
    text-decoration-color: currentColor;
    color: var(--primary-start) !important;
}
@media (prefers-color-scheme: dark) {
    .article-page a:not(.back-link):not(.read-more):not(.tag):not(.btn),
    .article-content a:not(.read-more), .article-body a:not(.read-more) { color: var(--primary-light) !important; }
}

/* 返回链接 */
.back-link {
    display: inline-flex !important;
    align-items: center;
    gap: 6px;
    margin: 8px 0 24px !important;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    background: var(--bg-tertiary);
    color: var(--text-secondary) !important;
    font-size: .88rem;
    font-weight: 550;
    text-decoration: none !important;
    transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}
.back-link:hover {
    background: rgba(99, 102, 241, .1) !important;
    color: var(--primary-dark) !important;
    transform: translateX(-2px);
    text-decoration: none !important;
}

/* 提示框：统一为现代样式 */
.highlight-box, .warn-box, .danger-box, .info-box, .tip-box {
    padding: 18px 22px !important;
    border-radius: var(--radius-md) !important;
    margin: 1.6em 0 !important;
    line-height: 1.8 !important;
    font-size: .96rem;
    border-left-width: 3px !important;
    border-left-style: solid !important;
}
.highlight-box {
    background: rgba(99, 102, 241, .06) !important;
    border-left-color: var(--primary-start) !important;
    color: var(--text-secondary) !important;
}
.warn-box {
    background: rgba(245, 158, 11, .09) !important;
    border-left-color: var(--accent-amber) !important;
    color: #92400e !important;
}
.danger-box {
    background: rgba(239, 68, 68, .07) !important;
    border-left-color: #ef4444 !important;
    color: #991b1b !important;
}
@media (prefers-color-scheme: dark) {
    .warn-box { color: #fcd34d !important; }
    .danger-box { color: #fca5a5 !important; }
}

.article-content blockquote, .article-body blockquote, .article-page blockquote {
    border-left: 3px solid var(--primary-start);
    background: rgba(99, 102, 241, .05);
    padding: 14px 20px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 1.4em 0;
    color: var(--text-secondary);
}
.article-content code, .article-body code, .article-page code {
    background: var(--bg-tertiary) !important;
    padding: 2px 6px !important;
    border-radius: 5px !important;
    font-size: .87em !important;
    color: #be185d;
    font-family: var(--font-mono);
}
@media (prefers-color-scheme: dark) {
    .article-content code, .article-body code, .article-page code { color: #f9a8d4; }
}
.article-content pre, .article-body pre, .article-page pre {
    background: #0b0f1a !important;
    color: #e2e8f0 !important;
    padding: 20px 22px !important;
    border-radius: var(--radius-md) !important;
    overflow-x: auto;
    margin: 1.4em 0 !important;
    font-size: .88rem !important;
    line-height: 1.7 !important;
    border: 1px solid rgba(255, 255, 255, .07);
}
.article-content pre code, .article-body pre code, .article-page pre code {
    background: none !important;
    color: inherit !important;
    padding: 0 !important;
    font-size: inherit !important;
}
.article-content table, .article-body table, .article-page table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.4em 0;
    font-size: .93rem;
}
.article-content th, .article-body th, .article-page th {
    background: var(--bg-tertiary);
    font-weight: 650;
    text-align: left;
    padding: 11px 14px;
    border-bottom: 2px solid var(--border-color);
}
.article-content td, .article-body td, .article-page td {
    padding: 10px 14px;
    border-bottom: var(--border-subtle);
    color: var(--text-secondary);
}
.article-content tr:hover td, .article-body tr:hover td, .article-page tr:hover td {
    background: rgba(99, 102, 241, .035);
}

/* ========== 17. 移动端微调 ========== */
@media (max-width: 768px) {
    nav { height: 62px !important; }
    .hero, .skills-hero { padding: 64px 20px !important; }
    .article-card { padding: 22px !important; }
    section, .ai-assistant, .articles, .videos, .tools, .support, .wechat {
        padding: 52px 18px !important;
    }
    .article-content, .article-body { font-size: 1rem; line-height: 1.82; }
}

/* ========== 18. 安全兜底：防止浏览器默认链接蓝 ========== */
a { text-decoration: none; }
a[href] { color: inherit; }
.article-page a, .article-content a, .article-body a, .post-content a {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}
.article-page a.back-link, .article-page a.read-more, .article-page a.tag, .article-page a.btn,
.article-content a.read-more, .article-body a.read-more, .ad-card, .btn {
    text-decoration: none;
}

/* ========== 19. 打印 ========== */
@media print {
    header, footer, .ad-slot, .support, .wechat, .hero::before, .hero::after { display: none !important; }
    body { background: #fff; color: #000; }
}