/* ============ 变量与主题 ============ */
:root {
  --bg: #0b0e14;
  --bg-soft: #0f131c;
  --panel: rgba(255, 255, 255, 0.035);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #e6e9ef;
  --text-dim: #9aa3b2;
  --text-faint: #5d6675;
  --accent: #4cc9f0;
  --accent-2: #8b5cf6;
  --glow-a: rgba(76, 201, 240, 0.14);
  --glow-b: rgba(139, 92, 246, 0.12);
  --code: #e0af68;
  --hl-keyword: #ff7b72;
  --hl-string: #a5d6ff;
  --hl-comment: #8b949e;
  --hl-number: #79c0ff;
  --hl-title: #d2a8ff;
  --hl-attr: #79c0ff;
  --hl-tag: #7ee787;
  --hl-meta: #ffa657;
  --hl-deletion: #ffdcd7;
  --radius: 12px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

html[data-theme="light"] {
  --bg: #f5f7fa;
  --bg-soft: #ffffff;
  --panel: rgba(0, 0, 0, 0.025);
  --border: rgba(15, 23, 42, 0.1);
  --border-strong: rgba(15, 23, 42, 0.2);
  --text: #0f172a;
  --text-dim: #475569;
  --text-faint: #94a3b8;
  --accent: #0891b2;
  --accent-2: #7c3aed;
  --glow-a: rgba(8, 145, 178, 0.12);
  --glow-b: rgba(124, 58, 237, 0.1);
  --code: #b45309;
  --hl-keyword: #cf222e;
  --hl-string: #0a3069;
  --hl-comment: #6e7781;
  --hl-number: #0550ae;
  --hl-title: #8250df;
  --hl-attr: #0550ae;
  --hl-tag: #116329;
  --hl-meta: #953800;
  --hl-deletion: #82071e;
  --shadow: 0 12px 36px rgba(15, 23, 42, 0.1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", -apple-system,
    "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  transition: background 0.35s ease, color 0.35s ease;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

::selection {
  background: var(--accent);
  color: #fff;
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* ============ 背景装饰 ============ */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -3;
  animation: bg-fade 0.9s ease both;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}
@keyframes bg-fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.bg-glow {
  position: fixed;
  z-index: -2;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
}
.bg-glow--a {
  width: 520px;
  height: 520px;
  top: -160px;
  left: -120px;
  background: var(--glow-a);
}
.bg-glow--b {
  width: 480px;
  height: 480px;
  top: 30%;
  right: -160px;
  background: var(--glow-b);
}
.bg-glow--c {
  display: none;
}

/* ---------- 背景变体 ---------- */

/* 1) 极光 */
html[data-bg="aurora"] .bg-grid {
  background-image: none;
}
html[data-bg="aurora"] .bg-glow {
  width: 560px;
  height: 560px;
  filter: blur(140px);
  opacity: 0.85;
}
html[data-bg="aurora"] .bg-glow--a {
  top: -200px;
  left: -140px;
  background: var(--glow-a);
}
html[data-bg="aurora"] .bg-glow--b {
  top: 38%;
  right: -180px;
  background: var(--glow-b);
}
html[data-bg="aurora"] .bg-glow--c {
  display: block;
  bottom: -220px;
  left: 28%;
  width: 640px;
  height: 640px;
  background: rgba(244, 114, 182, 0.1);
}

/* 2) 点阵 */
html[data-bg="dots"] .bg-grid {
  background-image: radial-gradient(circle, var(--border-strong) 1px, transparent 1.5px);
  background-size: 34px 34px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 35%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 35%, transparent 100%);
}
html[data-bg="dots"] .bg-glow--a {
  top: -180px;
  left: 10%;
}
html[data-bg="dots"] .bg-glow--b {
  top: 55%;
  right: -120px;
}

/* 3) 电路 */
html[data-bg="circuit"] .bg-grid {
  background-image: url("bg/circuit-dark.svg");
  background-size: 360px 360px;
  mask-image: none;
}
html[data-theme="light"][data-bg="circuit"] .bg-grid {
  background-image: url("bg/circuit-light.svg");
}

/* 4) 星云 */
html[data-bg="nebula"] .bg-grid {
  background-image:
    radial-gradient(1.2px 1.2px at 12% 22%, rgba(255, 255, 255, 0.65), transparent),
    radial-gradient(1px 1px at 28% 64%, rgba(255, 255, 255, 0.45), transparent),
    radial-gradient(1.4px 1.4px at 41% 12%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 55% 38%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1.2px 1.2px at 68% 74%, rgba(255, 255, 255, 0.55), transparent),
    radial-gradient(1px 1px at 79% 18%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1.3px 1.3px at 90% 55%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 8% 85%, rgba(255, 255, 255, 0.35), transparent);
  background-size: 460px 460px;
  mask-image: none;
}
html[data-theme="light"][data-bg="nebula"] .bg-grid {
  background-image:
    radial-gradient(1.2px 1.2px at 12% 22%, rgba(15, 23, 42, 0.5), transparent),
    radial-gradient(1px 1px at 28% 64%, rgba(15, 23, 42, 0.35), transparent),
    radial-gradient(1.4px 1.4px at 41% 12%, rgba(15, 23, 42, 0.4), transparent),
    radial-gradient(1px 1px at 55% 38%, rgba(15, 23, 42, 0.32), transparent),
    radial-gradient(1.2px 1.2px at 68% 74%, rgba(15, 23, 42, 0.42), transparent),
    radial-gradient(1px 1px at 79% 18%, rgba(15, 23, 42, 0.32), transparent),
    radial-gradient(1.3px 1.3px at 90% 55%, rgba(15, 23, 42, 0.4), transparent),
    radial-gradient(1px 1px at 8% 85%, rgba(15, 23, 42, 0.28), transparent);
}
html[data-bg="nebula"] .bg-glow--a {
  top: -140px;
  left: 22%;
}
html[data-bg="nebula"] .bg-glow--b {
  top: 45%;
  right: -100px;
}

/* 5) 斜纹 */
html[data-bg="diagonal"] .bg-grid {
  background-image: repeating-linear-gradient(
    135deg,
    transparent 0 18px,
    var(--border) 18px 19px
  );
  background-size: auto;
  mask-image: none;
}
html[data-bg="diagonal"] .bg-glow--a {
  width: 440px;
  height: 440px;
  top: -120px;
  left: 18%;
}
html[data-bg="diagonal"] .bg-glow--b {
  width: 420px;
  height: 420px;
  top: 60%;
  right: -100px;
}

/* ============ 导航 ============ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}
.nav.is-scrolled {
  border-bottom-color: var(--border);
}

.nav__inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.3px;
}
.nav__logo-mark {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  color: var(--accent);
  font-size: 15px;
}

.nav__links {
  display: flex;
  gap: 30px;
  font-size: 14.5px;
  color: var(--text-dim);
}
.nav__links a {
  position: relative;
  padding: 4px 0;
  transition: color 0.25s ease;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.25s ease;
}
.nav__links a:hover {
  color: var(--text);
}
.nav__links a:hover::after {
  width: 100%;
}

.theme-toggle {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.25s, border-color 0.25s, transform 0.25s;
}
.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--border-strong);
  transform: rotate(12deg);
}
.theme-toggle svg {
  width: 18px;
  height: 18px;
}
.icon-moon {
  display: none;
}
html[data-theme="light"] .icon-sun {
  display: none;
}
html[data-theme="light"] .icon-moon {
  display: block;
}

/* ============ Hero ============ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 1080px;
  margin: 0 auto;
  padding: 120px 24px 80px;
}

.hero__kicker {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 13px;
  color: var(--text-faint);
  letter-spacing: 1px;
  margin-bottom: 22px;
}
.hero__kicker::before {
  content: "$ ";
  color: var(--accent);
}

.hero__title {
  font-size: clamp(34px, 6vw, 62px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -1px;
}
.hero__title em {
  font-style: normal;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__line {
  display: block;
}

.hero__type {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 0.55em;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.5px;
}
.hero__cursor {
  display: inline-block;
  width: 2px;
  height: 0.5em;
  margin-left: 4px;
  background: var(--accent);
  vertical-align: baseline;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink {
  50% {
    opacity: 0;
  }
}

.hero__desc {
  margin-top: 22px;
  font-size: 16.5px;
  color: var(--text-dim);
  max-width: 520px;
}

.hero__actions {
  margin-top: 36px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  padding: 11px 26px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.25s ease, background 0.25s;
}
.btn:hover {
  transform: translateY(-2px);
}
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 8px 24px var(--glow-a);
}
.btn--primary:hover {
  box-shadow: 0 12px 32px var(--glow-b);
}
.btn--ghost {
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: var(--panel);
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero__meta {
  margin-top: 64px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 12.5px;
  color: var(--text-faint);
}
.hero__meta b {
  color: var(--accent);
  font-weight: 600;
}
.hero__meta-dot {
  color: var(--border-strong);
}

/* ============ Section 通用 ============ */
.section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 90px 24px;
}

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 34px;
}
.section__head h2 {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.section__tag {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 13px;
  color: var(--accent);
  margin-right: 12px;
  vertical-align: 2px;
}
.section__more {
  font-size: 13.5px;
  color: var(--text-dim);
  transition: color 0.25s;
}
.section__more:hover {
  color: var(--accent);
}

/* ============ 文章卡片 ============ */
.posts {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.3s ease;
}
.post-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.post-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}
.post-card:hover::before {
  transform: scaleX(1);
}

.post-card__cover {
  width: 100%;
  height: 158px;
  object-fit: cover;
  border-bottom: 1px solid var(--border);
}
.post-card__cover--default,
.post-card__cover--game {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  opacity: 0.35;
}
.post-card__cover--game {
  background:
    repeating-linear-gradient(0deg, transparent 0 26px, rgba(255, 255, 255, 0.12) 26px 27px),
    repeating-linear-gradient(90deg, transparent 0 26px, rgba(255, 255, 255, 0.12) 26px 27px),
    linear-gradient(135deg, #22c55e, #0d9488);
  opacity: 0.75;
}
.post-card__body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 24px 24px;
  flex: 1;
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 12px;
  color: var(--text-faint);
}
.post-card__tag {
  padding: 2px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--accent);
  font-size: 11px;
}
.post-card__tag--sub {
  color: var(--accent-2);
}
.post-card__pin {
  margin-left: auto;
  font-size: 11px;
  color: #f59e0b;
  border: 1px solid color-mix(in srgb, #f59e0b 40%, transparent);
  background: color-mix(in srgb, #f59e0b 8%, transparent);
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}
.post-card__title {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.45;
  transition: color 0.25s;
}
.post-card:hover .post-card__title {
  color: var(--accent);
}
.post-card__excerpt {
  font-size: 14px;
  color: var(--text-dim);
  flex: 1;
}
.post-card__more {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 12.5px;
  color: var(--text-faint);
  transition: color 0.25s;
}
.post-card:hover .post-card__more {
  color: var(--accent);
}

/* ---------- 主题卡 ---------- */
.theme-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.about-card {
  padding: 28px 30px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14.5px;
  color: var(--text-dim);
  line-height: 1.8;
  white-space: pre-wrap;
}
.theme-card {
  padding: 28px 26px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.3s;
}
.theme-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}
.theme-card__icon {
  font-size: 26px;
}
.theme-card__name {
  margin: 12px 0 8px;
  font-size: 18px;
  font-weight: 800;
}
.theme-card__desc {
  font-size: 13.5px;
  color: var(--text-dim);
  min-height: 40px;
}
.theme-card__subs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.theme-card__subs span {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 11.5px;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  background: color-mix(in srgb, var(--accent) 7%, transparent);
  padding: 3px 10px;
  border-radius: 999px;
}

/* ---------- 搜索框 ---------- */
.search {
  margin-bottom: 18px;
}
.search input {
  width: 100%;
  max-width: 420px;
  padding: 11px 16px 11px 40px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--panel) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%235d6675' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m21 21-4.3-4.3'/%3E%3C/svg%3E") 14px center no-repeat;
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 15%, transparent);
}

/* ============ 关于 ============ */
.about {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 20px;
}

.about__card {
  padding: 28px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.about__card h3 {
  font-size: 16px;
  margin-bottom: 14px;
  color: var(--accent);
}
.about__card p {
  font-size: 14.5px;
  color: var(--text-dim);
}
.about__motto {
  margin-top: 16px;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  color: var(--code) !important;
  font-size: 13.5px !important;
}

.skills {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 16px;
}
.skills li {
  font-size: 13.5px;
  color: var(--text-dim);
  padding-left: 20px;
  position: relative;
}
.skills li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ============ 归档 ============ */
.archive {
  border-top: 1px solid var(--border);
}
.archive__item {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 18px 6px;
  border-bottom: 1px solid var(--border);
  transition: padding-left 0.25s ease, background 0.25s;
}
.archive__item:hover {
  padding-left: 16px;
  background: var(--panel);
}
.archive__date {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 12.5px;
  color: var(--text-faint);
}
.archive__title {
  font-size: 15px;
  font-weight: 600;
  transition: color 0.25s;
}
.archive__item:hover .archive__title {
  color: var(--accent);
}
.archive__cat {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 11.5px;
  color: var(--text-faint);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 999px;
}

/* ============ 友链 ============ */
.links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.link-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 24px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.3s;
}
.link-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 8px 28px var(--glow-a);
}
.link-card__name {
  font-weight: 700;
  font-size: 15px;
}
.link-card__name::before {
  content: "→ ";
  color: var(--accent);
}
.link-card__desc {
  font-size: 13px;
  color: var(--text-dim);
}

/* ============ 首页双栏：右侧个人卡片 ============ */
.home {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  align-items: start;
}
.home-side {
  position: sticky;
  top: 96px;
  padding: 96px 0 40px;
}
.profile-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
  padding: 30px 26px 28px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 10px 34px var(--glow-a);
}
.profile-card__avatar {
  width: 132px;
  height: 132px;
  object-fit: cover;
  border-radius: 24px;
  border: 2px solid var(--border-strong);
  transition: transform 0.3s ease;
}
.profile-card__avatar-link {
  display: block;
  line-height: 0;
}
.profile-card__avatar-link:hover .profile-card__avatar {
  transform: scale(1.04);
}
.profile-card__avatar:hover {
  transform: scale(1.04);
}
.profile-card__socials {
  display: flex;
  justify-content: center;
  gap: 18px;
}
.social {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #fff;
  color: #181717;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.social svg {
  width: 22px;
  height: 22px;
}
.social:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 18px var(--glow-a);
}
.social--bilibili {
  color: #00a1d6;
}
.social--steam {
  color: #171a21;
}
.profile-card__sign {
  width: 140px;
  height: auto;
  opacity: 0.92;
  transition: opacity 0.25s ease;
}
.profile-card__sign:hover {
  opacity: 1;
}
/* 浅色主题下签名改为深色、平台图标换浅底，保证可读性 */
html[data-theme="light"] .profile-card__sign {
  filter: brightness(0) opacity(0.75);
}
html[data-theme="light"] .social {
  background: #e9ebee;
}

/* ============ 页脚 ============ */
.footer {
  max-width: 1080px;
  margin: 0 auto;
  padding: 50px 24px 60px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}
.footer__status {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 1.5px;
}
.footer__status i {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 8px #34d399;
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  50% {
    opacity: 0.4;
  }
}
.footer__copy {
  font-size: 13px;
  color: var(--text-faint);
}
.footer__copy a:hover {
  color: var(--accent);
}

/* ============ 动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .home {
    grid-template-columns: 1fr;
    max-width: 1080px;
  }
  .home-side {
    position: static;
    padding: 0 0 32px;
  }
}

@media (max-width: 820px) {
  .nav__links {
    gap: 18px;
  }
  .nav__links a {
    font-size: 13.5px;
  }
  .about {
    grid-template-columns: 1fr;
  }
  .archive__item {
    grid-template-columns: 86px 1fr;
  }
  .archive__cat {
    display: none;
  }
}

@media (max-width: 560px) {
  .nav__links {
    display: none;
  }
  .hero {
    padding-top: 100px;
  }
  .hero__meta {
    flex-wrap: wrap;
  }
  .section {
    padding: 64px 20px;
  }
  .section__head {
    flex-direction: column;
    gap: 6px;
  }
  .posts {
    grid-template-columns: 1fr;
  }
}

/* ================================================================
   新增：分类筛选 / 骨架屏 / 空状态 / 文章页 / 评论 / 管理后台
   ================================================================ */

/* ---------- 分类筛选 ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  font-family: inherit;
  transition: color 0.2s, border-color 0.2s, background 0.2s, transform 0.15s;
}
.chip span {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 11px;
  color: var(--text-faint);
}
.chip:hover {
  border-color: var(--border-strong);
  color: var(--text);
  transform: translateY(-1px);
}
.chip--active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
}
.chip--active span {
  color: rgba(255, 255, 255, 0.85);
}

/* ---------- 骨架屏与空状态 ---------- */
.skeleton {
  background: linear-gradient(90deg, var(--panel) 25%, var(--border) 50%, var(--panel) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.skeleton--card {
  height: 190px;
}
@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}
.empty {
  grid-column: 1 / -1;
  padding: 40px 0;
  text-align: center;
  color: var(--text-faint);
  font-size: 14px;
}

/* ---------- 文章详情页 ---------- */
.post-page {
  max-width: 820px;
  margin: 0 auto;
  padding: 110px 24px 40px;
}
.post-page__back {
  display: inline-block;
  margin-bottom: 28px;
  font-size: 13.5px;
  color: var(--text-dim);
  transition: color 0.2s;
}
.post-page__back:hover {
  color: var(--accent);
}

.post-article {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: clamp(28px, 5vw, 56px);
  margin-bottom: 40px;
}
.post-article__header {
  margin-bottom: 34px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--border);
}
.post-article__cover {
  width: 100%;
  max-height: 380px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
  margin-bottom: 28px;
}
.post-article__title {
  font-size: clamp(26px, 4.5vw, 38px);
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 18px;
}
.post-article__meta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 12.5px;
  color: var(--text-faint);
}
.post-article__tags {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.post-article__tag {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 11.5px;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  padding: 3px 10px;
  border-radius: 999px;
}
.post-article__loading {
  text-align: center;
  color: var(--text-faint);
  padding: 60px 0;
}
.post-article__foot {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--text-faint);
}
.post-article__pv {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
}
.post-article__pv b {
  color: var(--accent);
  font-weight: 600;
}

/* 文章正文 */
.post-content {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text);
}
.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
  margin: 1.8em 0 0.7em;
  line-height: 1.4;
  font-weight: 750;
}
.post-content h1 {
  font-size: 1.55em;
}
.post-content h2 {
  font-size: 1.32em;
  padding-bottom: 0.35em;
  border-bottom: 1px solid var(--border);
}
.post-content h3 {
  font-size: 1.13em;
  color: var(--accent);
}
.post-content p {
  margin: 0.9em 0;
}
.post-content a {
  color: var(--accent);
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  transition: border-color 0.2s;
}
.post-content a:hover {
  border-bottom-color: var(--accent);
}
.post-content strong {
  color: var(--code);
  font-weight: 700;
}
.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  margin: 1.2em 0;
  border: 1px solid var(--border);
}
.post-content code {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 0.88em;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  color: var(--accent);
  padding: 2px 7px;
  border-radius: 6px;
}
.post-content pre {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  overflow-x: auto;
  margin: 1.3em 0;
  line-height: 1.6;
}
html[data-theme="light"] .post-content pre {
  background: #f1f5f9;
}
.post-content pre code {
  background: none;
  color: #d7e2ee;
  padding: 0;
  font-size: 13px;
}
html[data-theme="light"] .post-content pre code {
  color: #334155;
}
.post-content pre code .hljs-keyword,
.post-content pre code .hljs-built_in,
.post-content pre code .hljs-literal,
.post-content pre code .hljs-type,
.post-content pre code .hljs-operator {
  color: var(--hl-keyword);
}
.post-content pre code .hljs-string,
.post-content pre code .hljs-regexp,
.post-content pre code .hljs-symbol,
.post-content pre code .hljs-addition {
  color: var(--hl-string);
}
.post-content pre code .hljs-comment,
.post-content pre code .hljs-quote {
  color: var(--hl-comment);
  font-style: italic;
}
.post-content pre code .hljs-number {
  color: var(--hl-number);
}
.post-content pre code .hljs-title,
.post-content pre code .hljs-title.class_,
.post-content pre code .hljs-function,
.post-content pre code .hljs-section {
  color: var(--hl-title);
}
.post-content pre code .hljs-attr,
.post-content pre code .hljs-attribute,
.post-content pre code .hljs-property,
.post-content pre code .hljs-variable,
.post-content pre code .hljs-template-variable,
.post-content pre code .hljs-params {
  color: var(--hl-attr);
}
.post-content pre code .hljs-meta,
.post-content pre code .hljs-doctag,
.post-content pre code .hljs-name,
.post-content pre code .hljs-selector-tag,
.post-content pre code .hljs-selector-class,
.post-content pre code .hljs-tag {
  color: var(--hl-tag);
}
.post-content pre code .hljs-deletion {
  color: var(--hl-deletion);
}
.post-content pre code .hljs-emphasis {
  font-style: italic;
}
.post-content pre code .hljs-strong {
  font-weight: 700;
}
.post-content blockquote {
  margin: 1.3em 0;
  padding: 14px 20px;
  border-left: 3px solid var(--accent);
  background: var(--panel);
  border-radius: 0 10px 10px 0;
  color: var(--text-dim);
  font-size: 0.96em;
}
.post-content blockquote p {
  margin: 0.3em 0;
}
.post-content ul,
.post-content ol {
  margin: 1em 0;
  padding-left: 1.6em;
}
.post-content li {
  margin: 0.4em 0;
}
.post-content li::marker {
  color: var(--accent);
}
.post-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.3em 0;
  font-size: 0.93em;
}
.post-content th,
.post-content td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.post-content th {
  background: var(--panel);
  font-weight: 700;
}
.post-content del {
  color: var(--text-faint);
}

/* ---------- 评论 ---------- */
.comments {
  margin-top: 12px;
}
.comments__title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 20px;
}
.comments__title span {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 13px;
  color: var(--text-faint);
  font-weight: 500;
}
.comments__notice {
  padding: 26px;
  text-align: center;
  color: var(--text-faint);
  font-size: 13.5px;
  background: var(--panel);
  border: 1px dashed var(--border-strong);
  border-radius: 12px;
}

/* Waline 评论适配 */
#waline {
  --waline-font-size: 14px;
  --waline-theme-color: var(--accent);
  --waline-active-color: var(--accent-2);
  --waline-text-color: var(--text);
  --waline-info-color: var(--text-faint);
  --waline-border-color: var(--border);
  --waline-bgcolor: var(--panel);
  --waline-bgcolor-light: var(--bg-soft);
  color: var(--text);
}
#waline .wl-panel,
#waline .wl-comment-item {
  background: var(--panel);
}

/* 隐藏"订阅本文评论 / 订阅本站评论"RSS 按钮（多数访客用不到） */
#waline .wl-rss {
  display: none;
}

.comment-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 28px;
}
.comment-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.comment-form input,
.comment-form textarea,
.editor input,
.editor textarea,
.admin-login__card input {
  width: 100%;
  padding: 11px 14px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.comment-form input:focus,
.comment-form textarea:focus,
.editor input:focus,
.editor textarea:focus,
.admin-login__card input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 15%, transparent);
}
.comment-form textarea {
  resize: vertical;
  min-height: 90px;
}
.comment-form__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.comment-form__tip {
  font-size: 12.5px;
  color: var(--text-faint);
}

.comment-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.comment-item {
  padding: 18px 22px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.comment-item__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
.comment-item__avatar {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  flex-shrink: 0;
}
.comment-item__who {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.comment-item__name {
  font-size: 14px;
  font-weight: 700;
}
.comment-item__date {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 11.5px;
  color: var(--text-faint);
}
.comment-item__body {
  font-size: 14px;
  color: var(--text-dim);
  white-space: pre-wrap;
  word-break: break-word;
}

/* ---------- 管理后台 ---------- */
.admin-login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.admin-login__card {
  width: min(400px, 100%);
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 36px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
}
.admin-login__title {
  font-size: 24px;
  font-weight: 800;
}
.admin-login__hint {
  font-size: 13px;
  color: var(--text-faint);
  margin-bottom: 6px;
}
.admin-login__error {
  font-size: 13px;
  color: #f87171;
  min-height: 18px;
}

.admin {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 24px 80px;
}
.admin__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 18px;
}
.admin__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}
.admin__top-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}
.admin__link {
  font-size: 13.5px;
  color: var(--text-dim);
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: color 0.2s;
}
.admin__link:hover {
  color: var(--accent);
}

.admin__tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.admin__tab {
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  color: var(--text-dim);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.admin__tab:hover {
  color: var(--text);
}
.admin__tab.is-active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.admin__panel {
  display: none;
}
.admin__panel.is-active {
  display: block;
}
.admin__panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.admin__panel-head h2 {
  font-size: 20px;
  font-weight: 800;
}
.admin__panel-actions {
  display: flex;
  gap: 10px;
}

.admin-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 14px;
}
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.admin-table th,
.admin-table td {
  padding: 13px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.admin-table th {
  font-size: 12px;
  letter-spacing: 0.5px;
  color: var(--text-faint);
  background: var(--panel);
  font-weight: 600;
}
.admin-table tr:last-child td {
  border-bottom: none;
}
.admin-table__title {
  font-weight: 600;
  max-width: 380px;
}
.admin-table__mono {
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 12.5px;
  color: var(--text-faint);
}
.admin-table__empty {
  text-align: center;
  color: var(--text-faint);
  padding: 36px 0 !important;
}
.admin-table__ops {
  display: flex;
  gap: 8px;
  align-items: center;
}
.admin-table__op {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  font-size: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.admin-table__op:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.admin-table__op--danger:hover {
  color: #f87171;
  border-color: #f87171;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  font-size: 11.5px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  color: var(--text-faint);
}
.badge--ok {
  color: #34d399;
  border-color: color-mix(in srgb, #34d399 40%, transparent);
  background: color-mix(in srgb, #34d399 8%, transparent);
}

/* 编辑器 */
.editor {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
}
.editor label {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  flex: 1;
}
.editor__row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
}
.editor textarea {
  resize: vertical;
  font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 13.5px;
  line-height: 1.7;
}
.editor__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.editor__publish {
  flex-direction: row !important;
  align-items: center;
  font-size: 13px;
  color: var(--text-dim);
  cursor: pointer;
}
.editor__publish input {
  width: auto;
  accent-color: var(--accent);
}
.editor__preview {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.editor__preview-head {
  padding: 10px 16px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-faint);
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.editor__preview .post-content {
  padding: 20px;
}

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 36px;
  transform: translateX(-50%);
  padding: 11px 22px;
  font-size: 13.5px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 999px;
  box-shadow: var(--shadow);
  z-index: 200;
  animation: toast-in 0.3s ease;
}
.toast--error {
  background: linear-gradient(135deg, #f87171, #ef4444);
}
@keyframes toast-in {
  from {
    opacity: 0;
    transform: translate(-50%, 12px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

/* ---------- 响应式补充 ---------- */
@media (max-width: 720px) {
  .comment-form__row {
    grid-template-columns: 1fr;
  }
  .editor__row {
    grid-template-columns: 1fr;
  }
  .post-page {
    padding-top: 96px;
  }
}