/* ===== Base ===== */
:root {
  --bg: #fafafa;
  --bg-alt: #ffffff;
  --card: #ffffff;
  --text: #1f2328;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --nav-bg: rgba(250, 250, 250, .85);
  --quote-bg: #f6f8fb;
  --code-bg: #f3f4f6;
  --tag-bg: #eff6ff;
  --tag-border: #bfdbfe;
  --post-hover-border: #c7d7f8;
  --glow-a: rgba(37, 99, 235, .10);
  --glow-b: rgba(139, 92, 246, .09);
  --glow-c: rgba(37, 99, 235, .06);
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.35);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  --font: "PingFang SC", "Microsoft YaHei", -apple-system, "Segoe UI",
    "Helvetica Neue", Arial, sans-serif;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --bg-alt: #111c34;
  --card: #1e293b;
  --text: #e2e8f0;
  --text-light: #94a3b8;
  --border: #334155;
  --accent: #60a5fa;
  --accent-dark: #3b82f6;
  --nav-bg: rgba(15, 23, 42, .85);
  --quote-bg: #1e293b;
  --code-bg: #1e293b;
  --tag-bg: rgba(96, 165, 250, .16);
  --tag-border: rgba(96, 165, 250, .4);
  --post-hover-border: #3b82f6;
  --glow-a: rgba(96, 165, 250, .10);
  --glow-b: rgba(167, 139, 250, .09);
  --glow-c: rgba(96, 165, 250, .07);
  --glass-bg: rgba(15, 23, 42, 0.55);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

/* 确保 hidden 属性始终生效（不被 display:flex 等规则覆盖） */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* 统一大背景：固定全屏辉光层，所有板块透明透出，顶部也覆盖，无割裂 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(52rem 36rem at 50% -6%, var(--glow-a), transparent 62%),
    radial-gradient(60rem 40rem at 12% 30%, var(--glow-b), transparent 60%),
    radial-gradient(70rem 50rem at 88% 45%, var(--glow-a), transparent 60%),
    radial-gradient(60rem 45rem at 50% 100%, var(--glow-c), transparent 65%);
}

main { position: relative; z-index: 1; }
.footer { position: relative; z-index: 1; }

/* 主题切换：原生 View Transitions 优雅溶解 */
::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: .35s;
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-dark); }

/* ===== Nav ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
}

.nav .nav-inner {
  max-width: 100% !important;
  width: 100%;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  padding: 0 28px;
}

.nav-logo {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .5px;
  color: var(--text);
}
.nav-logo span { color: var(--accent); }

.nav-links { display: flex; gap: 28px; }
.nav-links a {
  color: var(--text-light);
  font-size: 15px;
  position: relative;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width .25s;
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--text); font-weight: 600; }
.nav-links a.active::after { width: 100%; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* 日夜主题切换按钮 */
.theme-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: all .25s;
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(20deg);
}
.theme-toggle svg {
  position: absolute;
  width: 17px;
  height: 17px;
  transition: opacity .3s ease, transform .3s ease;
}
.theme-toggle .icon-moon { opacity: 1; transform: rotate(0deg); }
.theme-toggle .icon-sun { opacity: 0; transform: rotate(90deg); }
[data-theme="dark"] .theme-toggle .icon-moon { opacity: 0; transform: rotate(-90deg); }
[data-theme="dark"] .theme-toggle .icon-sun { opacity: 1; transform: rotate(0deg); }

/* 切换按钮动效 */
.theme-toggle.is-switching {
  animation: themeSpin .6s ease;
}
@keyframes themeSpin {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.18); }
  100% { transform: rotate(360deg) scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  .theme-toggle.is-switching { animation: none; }
  .theme-toggle svg { transition: none; }
}

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; }
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
  transition: .3s;
}

/* ===== Hero ===== */
.hero {
  padding: 110px 0 90px;
  text-align: center;
  /* 背景完全透明，露出统一的全局辉光大背景 */
}

.hero-greeting { color: var(--text-light); font-size: 16px; margin-bottom: 8px; }

.hero-title {
  font-size: clamp(40px, 7vw, 64px);
  font-weight: 800;
  letter-spacing: 2px;
  background: linear-gradient(90deg, #2563eb, #8b5cf6, #ec4899, #f97316, #22c55e, #06b6d4, #2563eb);
  background-size: 400% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 12px;
}

/* 标题持续颜色渐变（全色相平滑过渡，首尾同色无缝循环） */
@keyframes heroGradientFlow {
  0% { background-position: 0% 50%; }
  100% { background-position: 400% 50%; }
}

.hero-subtitle { font-size: 18px; color: var(--text-light); margin-bottom: 20px; }

.hero-desc {
  max-width: 520px;
  margin: 0 auto 36px;
  color: var(--text-light);
  font-size: 15px;
}

.hero-actions { display: flex; gap: 16px; justify-content: center; }

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 11px 28px;
  border: none;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all .25s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 18px rgba(37, 99, 235, .3); }
.btn-outline { border: 1px solid var(--border); color: var(--text); background: var(--card); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ===== Sections ===== */
.section { padding: 80px 0; }
.section-alt { }

.section-title {
  font-size: 30px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  position: relative;
}
.section-title::after {
  content: "";
  display: block;
  width: 44px;
  height: 3px;
  background: var(--accent);
  margin: 14px auto 0;
  border-radius: 2px;
}

.section-desc { text-align: center; color: var(--text-light); margin-bottom: 44px; font-size: 15px; }
.section-desc:empty { display: none; }

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.about-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: transform .25s, box-shadow .25s;
}
.about-card:hover { transform: translateY(-4px); box-shadow: 0 10px 30px rgba(0, 0, 0, .06); }
.about-card h3 { font-size: 16px; margin-bottom: 12px; }
.about-card ul { list-style: none; }
.about-card li {
  color: var(--text-light);
  font-size: 14px;
  padding: 4px 0;
  position: relative;
  padding-left: 16px;
}
.about-card li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ===== Projects ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.project-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  color: var(--text);
  transition: transform .25s, box-shadow .25s;
}
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .06);
  color: var(--text);
}
.project-card h3 { font-size: 17px; margin-bottom: 8px; }
.project-card p { font-size: 14px; color: var(--text-light); margin-bottom: 14px; }

.tag {
  display: inline-block;
  font-size: 12px;
  padding: 3px 12px;
  border-radius: 999px;
  background: var(--tag-bg);
  color: var(--accent);
  border: 1px solid var(--tag-border);
}

/* ===== Blog ===== */
.blog-toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.upload-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-bottom: 44px;
}

.upload-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border: 2px dashed var(--border);
  border-radius: 999px;
  color: var(--text-light);
  font-size: 14px;
  cursor: pointer;
  transition: all .25s;
  background: var(--card);
}
.upload-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--tag-bg);
}

.btn-clear {
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 13px;
  cursor: pointer;
  text-decoration: underline;
  transition: color .2s;
}
.btn-clear:hover { color: #dc2626; }

/* Blog list */
.blog-list { display: flex; flex-direction: column; gap: 16px; }

.post-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px 26px;
  cursor: pointer;
  transition: transform .25s, box-shadow .25s;
}
.post-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .06);
  border-color: var(--post-hover-border);
}
.post-card h3 { font-size: 18px; margin-bottom: 6px; }
.post-card p { font-size: 14px; color: var(--text-light); }

.post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-light);
  margin-top: 10px;
}

.tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tags .tag { background: var(--code-bg); border-color: var(--border); color: var(--text-light); }

/* Post view */
.back-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 15px;
  cursor: pointer;
  margin-bottom: 20px;
  padding: 0;
}
.back-btn:hover { color: var(--accent-dark); }

.post {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
}

.post-title { font-size: 30px; font-weight: 700; line-height: 1.4; margin-bottom: 10px; }

.post-content { margin-top: 28px; font-size: 16px; }
.post-content h2, .post-content h3 {
  margin: 28px 0 12px;
  line-height: 1.4;
}
.post-content h2 { font-size: 24px; }
.post-content h3 { font-size: 19px; }
.post-content p { margin-bottom: 16px; }
.post-content ul, .post-content ol { padding-left: 24px; margin-bottom: 16px; }
.post-content li { margin-bottom: 6px; }
.post-content a { text-decoration: underline; text-underline-offset: 3px; }
.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 8px 18px;
  margin: 16px 0;
  color: var(--text-light);
  background: var(--quote-bg);
  border-radius: 0 8px 8px 0;
}
.post-content code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
}
.post-content pre {
  background: #1f2328;
  color: #f3f4f6;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 16px;
}
.post-content pre code { background: none; padding: 0; color: inherit; }
.post-content table { border-collapse: collapse; margin-bottom: 16px; }
.post-content th, .post-content td { border: 1px solid var(--border); padding: 8px 12px; }
.post-content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 24px auto;
  border-radius: 12px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, .08);
}

/* Empty state */
.empty {
  text-align: center;
  color: var(--text-light);
  padding: 40px 0;
  font-size: 14px;
}
.empty .icon { font-size: 34px; margin-bottom: 10px; display: block; }

/* ===== Contact ===== */
.contact-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 32px;
}
.contact-links a {
  color: var(--text-light);
  font-size: 15px;
  position: relative;
  padding-bottom: 4px;
}
.contact-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width .25s;
}
.contact-links a:hover { color: var(--accent); }
.contact-links a:hover::after { width: 100%; }

/* ===== Footer ===== */
.footer {
  padding: 28px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-light);
}

/* ===== 彩虹鼠标拖尾 ===== */
#rainbow-trail {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 9999;
  pointer-events: none;
}

/* ===== 页面动效 ===== */
/* 滚动进度条 */
#progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, #2563eb, #8b5cf6, #ec4899);
  z-index: 1000;
  transition: width .1s linear;
}

/* 滚动渐显 */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .6s cubic-bezier(.22, .61, .36, 1),
              transform .6s cubic-bezier(.22, .61, .36, 1);
}
.reveal-visible { opacity: 1; transform: none; }

/* 首屏入场动画 */
.hero .hero-greeting,
.hero .hero-title,
.hero .hero-subtitle,
.hero .hero-desc,
.hero .hero-actions {
  opacity: 0;
  animation: fadeUp .7s ease forwards;
}
.hero .hero-greeting { animation-delay: .1s; }
.hero .hero-title {
  animation: heroGradientFlow 12s linear infinite, fadeUp .7s ease forwards;
  animation-delay: 0s, .25s;
}
.hero .hero-subtitle { animation-delay: .45s; }
.hero .hero-desc { animation-delay: .6s; }
.hero .hero-actions { animation-delay: .8s; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: none; }
}

/* 阅读模式（新标签页直接查看文章） */
.reading-mode .blog-toolbar,
.reading-mode .blog-search,
.reading-mode .section-desc { display: none; }

/* 全站隐藏原生滚动条，用顶部彩虹进度条代替 */
html { scrollbar-width: none; -ms-overflow-style: none; }
html::-webkit-scrollbar { display: none; }

/* 搜索 + 标签：下拉卡片（淡入 + 下滑 + 缩放，不改布局高度） */
.blog-search {
  position: relative;
  height: 0;
  z-index: 10;
}
.search-panel {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  padding: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, .12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px) scale(.98);
  transition: opacity .28s ease, transform .35s cubic-bezier(.22, .61, .36, 1), visibility 0s linear .35s;
}
.blog-search.open .search-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  transition: opacity .28s ease, transform .35s cubic-bezier(.22, .61, .36, 1), visibility 0s;
}
.search-panel .tag-filter { margin-top: 14px; }
.search-panel .search-result-count { margin-top: 12px; }

/* 上一篇 / 下一篇 */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.post-nav-item {
  display: inline-block;
  max-width: 48%;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  transition: border-color .2s, color .2s;
}
.post-nav-item:hover { border-color: var(--accent); color: var(--accent); }
.post-nav-item.next { margin-left: auto; text-align: right; }

/* 阅读页底部返回链接 */
.post-bottomlinks { text-align: center; margin-top: 26px; }
.reading-mode .container { max-width: 980px; }
.reading-mode .section { padding-top: 44px; }
.reading-mode .post { padding: 48px 56px; }
.reading-mode .post-title { font-size: 34px; }

/* ===== 友链 ===== */
.friends-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
}
.friend-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.friend-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .06);
  border-color: var(--post-hover-border);
  color: var(--text);
}
.friend-avatar {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.friend-info { min-width: 0; }
.friend-info h3 { font-size: 16px; margin-bottom: 2px; }
.friend-info p {
  font-size: 13px;
  color: var(--text-light);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

/* ===== 归档时间线 ===== */
.tl-group { margin-bottom: 36px; }
.tl-year {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text);
  position: relative;
  padding-left: 16px;
}
.tl-year::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 20px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent), #8b5cf6);
}
.tl-list {
  position: relative;
  padding-left: 28px;
}
.tl-list::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--border);
  border-radius: 2px;
}
.tl-item {
  position: relative;
  padding: 9px 0;
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.tl-item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--card);
  border: 2px solid var(--accent);
}
.tl-item:hover::before { background: var(--accent); }
.tl-date {
  font-size: 13px;
  color: var(--text-light);
  min-width: 92px;
  font-variant-numeric: tabular-nums;
}
.tl-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
}
.tl-title:hover { color: var(--accent); }
.tl-tags { display: inline-flex; gap: 6px; }

/* 博客搜索 / 标签筛选 */
.blog-search { margin-bottom: 0; }
.search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 2px 10px;
  border-bottom: 1px solid var(--border);
  transition: border-color .2s;
}
.search-box:focus-within { border-color: var(--accent); }
.search-box svg { width: 16px; height: 16px; color: var(--text-light); flex-shrink: 0; }
.search-box input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 14px;
  color: var(--text);
  font-family: var(--font);
}
.search-box input::placeholder { color: var(--text-light); }
.search-box input::-webkit-search-cancel-button { -webkit-appearance: none; }
.search-clear {
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 15px;
  cursor: pointer;
  padding: 2px 6px;
}
.search-clear:hover { color: var(--accent); }

.tag-filter { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.tag-chip {
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  color: var(--accent);
  font-size: 12px;
  padding: 4px 13px;
  border-radius: 999px;
  cursor: pointer;
  transition: all .2s;
}
.tag-chip:hover { transform: translateY(-1px); }
.tag-chip.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.search-result-count { margin-top: 12px; font-size: 13px; color: var(--text-light); }

/* 减少动态效果（无障碍） */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* 主题切换过渡由原生 View Transitions 完成（见 Base 段） */

/* 博客页背景特效：3D 线框体 */
#constellation {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.reading-mode #constellation { display: none; }

/* ===== 留言板 ===== */
.gb-status {
  margin-bottom: 20px;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.6;
}
.gb-status.warn { background: rgba(245, 158, 11, .12); border: 1px solid rgba(245, 158, 11, .35); color: #b45309; }
.gb-status.ok { background: rgba(34, 197, 94, .12); border: 1px solid rgba(34, 197, 94, .35); color: #15803d; }
[data-theme="dark"] .gb-status.warn { color: #fbbf24; }
[data-theme="dark"] .gb-status.ok { color: #4ade80; }

.gb-form { margin-bottom: 30px; padding: 18px; border-radius: 14px; }
.gb-input,
.gb-textarea {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
}
.gb-input:focus,
.gb-textarea:focus { outline: none; border-color: var(--accent); }
.gb-textarea { resize: vertical; line-height: 1.6; }
.gb-form-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.gb-count { font-size: 12px; color: var(--text-light); }
.gb-turnstile { margin-bottom: 12px; }
.gb-turnstile .cf-turnstile { display: inline-block; }

.gb-list { display: flex; flex-direction: column; gap: 14px; }
.gb-item { padding: 16px 18px; border-radius: 12px; }
.gb-item-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 6px; }
.gb-name { font-weight: 600; font-size: 15px; color: var(--text); }
.gb-time { font-size: 12px; color: var(--text-light); }
.gb-text { font-size: 14px; color: var(--text); line-height: 1.7; white-space: pre-wrap; word-break: break-word; }

/* ===== 毛玻璃（自研：半透明 + 背景模糊 + 顶部内高光） ===== */
.about-card,
.project-card,
.post-card,
.post,
.friend-card,
.search-panel,
.post-nav-item,
.gb-form,
.gb-item,
.cm-form,
.cm-item,
.admin-card {
  background: var(--glass-bg);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* ===== Responsive ===== */
@media (max-width: 720px) {
  .about-grid, .projects-grid { grid-template-columns: 1fr; }

  .container { padding: 0 20px; }
  .nav .nav-inner { padding: 0 20px; }

  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 10px 20px 18px;
    gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 12px 4px;
    font-size: 16px;
  }
  .nav-links a::after { bottom: 8px; }

  .nav-toggle {
    display: block;
    padding: 8px;
    margin: -8px;
  }

  .hero { padding: 72px 0 56px; }
  .hero-subtitle { font-size: 16px; }
  .hero-actions { flex-wrap: wrap; gap: 12px; }

  .section { padding: 52px 0; }
  .section-title { font-size: 26px; }

  .about-card, .project-card { padding: 20px; }
  .post { padding: 22px; }
  .post-title { font-size: 23px; }
  .reading-mode .post { padding: 24px; }
  .reading-mode .post-title { font-size: 26px; }

  .blog-toolbar { flex-direction: column; align-items: center; }
  .blog-source { line-height: 1.6; }
  .contact-links { gap: 20px; }
}

/* 小屏手机 */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .nav .nav-inner { padding: 0 16px; }

  .hero { padding: 56px 0 44px; }
  .hero-title { letter-spacing: 1px; }
  .hero-desc { font-size: 14px; }

  .section { padding: 44px 0; }
  .section-title { font-size: 23px; }

  .btn { padding: 10px 22px; font-size: 14px; }
  .post { padding: 18px; }
  .post-content { font-size: 15px; }
  .post-content pre { padding: 12px; }
  .reading-mode .post { padding: 16px; }

  .about-card, .project-card { padding: 18px; }
  .upload-bar, .blog-toolbar { gap: 10px; }
}

/* ===== 评论 / 留言组件（留言墙 + 博客文章共用） ===== */
.cm { margin-top: 6px; }
.cm-status,
.cm-empty {
  font-size: 14px;
  line-height: 1.6;
}
.cm-status {
  margin: 14px 0;
  padding: 12px 14px;
  border-radius: 10px;
  background: rgba(37, 99, 235, .10);
  border: 1px solid rgba(37, 99, 235, .28);
  color: var(--text);
}
.cm-status.warn { background: rgba(245, 158, 11, .12); border: 1px solid rgba(245, 158, 11, .35); color: #b45309; }
.cm-status.ok { background: rgba(34, 197, 94, .12); border: 1px solid rgba(34, 197, 94, .35); color: #15803d; }
[data-theme="dark"] .cm-status.warn { color: #fbbf24; }
[data-theme="dark"] .cm-status.ok { color: #4ade80; }

.cm-empty { padding: 22px 4px; color: var(--text-light); text-align: center; }

.cm-form { margin-bottom: 26px; padding: 18px; border-radius: 14px; }
.cm-input,
.cm-textarea {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
}
.cm-input:focus,
.cm-textarea:focus { outline: none; border-color: var(--accent); }
.cm-textarea { resize: vertical; line-height: 1.6; }
.cm-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.cm-count { font-size: 12px; color: var(--text-light); }
.cm-turnstile { margin-bottom: 12px; }
.cm-turnstile .cf-turnstile { display: inline-block; }

.cm-reply-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 13px;
  background: rgba(37, 99, 235, .08);
  border: 1px solid rgba(37, 99, 235, .22);
}
.cm-reply-hint b { color: var(--accent); }
.cm-cancel {
  margin-left: auto;
  border: none;
  background: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
}
.cm-cancel:hover { text-decoration: underline; }

.cm-adminbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
  background: rgba(34, 197, 94, .10);
  border: 1px solid rgba(34, 197, 94, .30);
}
.cm-admin-exit {
  border: none;
  background: none;
  color: #15803d;
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
}
[data-theme="dark"] .cm-admin-exit { color: #4ade80; }
.cm-admin-exit:hover { text-decoration: underline; }

.cm-list { display: flex; flex-direction: column; gap: 14px; }
.cm-item { padding: 16px 18px; border-radius: 12px; }
.cm-item.is-owner { border-left: 3px solid var(--accent); }
.cm-item-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 6px; }
.cm-name { font-weight: 600; font-size: 15px; color: var(--text); }
.cm-badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  vertical-align: middle;
  color: #fff;
  background: var(--accent);
}
.cm-time { font-size: 12px; color: var(--text-light); }
.cm-text { font-size: 14px; color: var(--text); line-height: 1.7; white-space: pre-wrap; word-break: break-word; }
.cm-actions { display: flex; gap: 14px; margin-top: 10px; }
.cm-act {
  border: none;
  background: none;
  padding: 0;
  color: var(--text-light);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
}
.cm-act:hover { color: var(--accent); }
.cm-act-withdraw:hover { color: #dc2626; }

.cm-replies {
  margin: 10px 0 0 22px;
  padding-left: 14px;
  border-left: 2px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.cm-item.is-reply { padding: 12px 14px; }

/* 博客文章底部评论区 */
.post-comments { margin-top: 34px; padding-top: 24px; border-top: 1px solid var(--border); }

/* ===== 站主后台 ===== */
.admin-card { padding: 20px; border-radius: 14px; max-width: 420px; margin: 0 auto; }
.admin-actions { display: flex; justify-content: flex-end; }
.admin-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  font-size: 14px;
}
.admin-bar-btns { display: flex; gap: 10px; }
.admin-list { display: flex; flex-direction: column; gap: 26px; }
.admin-group-title {
  font-size: 16px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.admin-count {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-light);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 9px;
}
.admin-group .cm-item { margin-bottom: 12px; }
.ad-replybox { margin-top: 12px; }
.ad-reply-btns { display: flex; gap: 10px; }