:root {
  --bg: #f6f8fb;
  --paper: #ffffff;
  --ink: #27313f;
  --muted: #758195;
  --line: rgba(63, 79, 99, 0.12);
  --primary: #27a7b8;
  --primary-dark: #168596;
  --rose: #e46f7a;
  --gold: #e6b75e;
  --shadow: 0 14px 40px rgba(45, 61, 82, 0.13);
  --soft-shadow: 0 8px 24px rgba(45, 61, 82, 0.09);
  --radius: 8px;
  --content: 1160px;
  --serif: "Noto Serif SC", "Microsoft YaHei", "PingFang SC", "Songti SC", serif;
  --display: "Noto Serif SC", "Microsoft YaHei", "PingFang SC", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(39, 167, 184, 0.12), transparent 32rem),
    linear-gradient(180deg, #eef7fa 0%, var(--bg) 42rem);
  font-family: var(--serif);
  line-height: 1.7;
}

body.reader-open {
  overflow: hidden;
}

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

button,
input {
  font: inherit;
}

.site-noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: 0.05;
  background-image:
    linear-gradient(0deg, rgba(255, 255, 255, 0.8) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 94, 116, 0.5) 1px, transparent 1px);
  background-size: 44px 44px;
  mix-blend-mode: multiply;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 clamp(18px, 4vw, 52px);
  color: #fff;
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 8px 24px rgba(30, 45, 62, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  visibility: hidden;
  font-family: var(--display);
  font-size: 1.42rem;
  font-weight: 700;
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  position: relative;
  padding: 8px 13px;
  font-size: 0.94rem;
  border-radius: 999px;
  opacity: 0.96;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 3px;
  height: 2px;
  border-radius: 4px;
  background: currentColor;
  transform: scaleX(0);
  transition: transform 0.2s ease;
}

.site-nav a:hover::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
  border-radius: 2px;
}

.hero {
  position: relative;
  display: grid;
  min-height: 100vh;
  place-items: center;
  overflow: hidden;
  color: #fff;
  text-align: center;
  background:
    linear-gradient(rgba(0, 0, 0, 0.22), rgba(0, 0, 0, 0.34)),
    url("../images/hero-berserk-moon.jpg") center / cover fixed;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 34% 20%, rgba(255, 255, 255, 0.08), transparent 13rem),
    linear-gradient(90deg, rgba(0, 0, 0, 0.2), transparent 38%, rgba(0, 0, 0, 0.24));
}

.hero-stars {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.65) 1px, transparent 1.6px),
    radial-gradient(circle, rgba(255, 255, 255, 0.45) 1px, transparent 1.8px);
  background-position: 0 0, 42px 58px;
  background-size: 112px 112px, 168px 168px;
  animation: drift 28s linear infinite;
  opacity: 0.32;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(880px, calc(100% - 32px));
  padding-top: 12px;
}

.hero h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(3.1rem, 9vw, 6.8rem);
  line-height: 1.02;
  text-shadow: 0 14px 40px rgba(0, 0, 0, 0.24);
}

.typewriter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.25em;
  margin: 22px auto 0;
  font-size: clamp(1rem, 2.4vw, 1.35rem);
  opacity: 0.95;
}

.typewriter::after {
  content: "|";
  margin-left: 4px;
  animation: blink 1s steps(1) infinite;
}

.scroll-down {
  position: absolute;
  bottom: 24px;
  left: 50%;
  z-index: 2;
  width: 22px;
  height: 36px;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 999px;
  transform: translateX(-50%);
}

.scroll-down::after {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  width: 4px;
  height: 8px;
  border-radius: 999px;
  background: #fff;
  transform: translateX(-50%);
  animation: wheel 1.5s ease-in-out infinite;
}

.page-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 24px;
  width: min(var(--content), calc(100% - 28px));
  margin: 34px auto 0;
  padding-bottom: 56px;
  position: relative;
  z-index: 4;
}

.card {
  border: 1px solid rgba(255, 255, 255, 0.68);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--soft-shadow);
  backdrop-filter: blur(18px);
}

.toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 16px;
}

.search-box {
  display: flex;
  min-width: 0;
  flex: 1;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(246, 248, 251, 0.82);
}

.search-box input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  color: var(--ink);
  background: transparent;
}

.clear-filter,
.post-read,
.reader-close,
.to-top {
  border: 0;
  cursor: pointer;
}

.clear-filter,
.post-read {
  border-radius: var(--radius);
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  box-shadow: 0 10px 22px rgba(39, 167, 184, 0.22);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.clear-filter {
  flex: 0 0 auto;
  padding: 10px 16px;
}

.clear-filter:hover,
.post-read:hover {
  transform: translateY(-2px);
  box-shadow: 0 13px 26px rgba(39, 167, 184, 0.28);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin: 22px 4px 14px;
}

.section-heading h2 {
  margin: 0;
  font-size: 1.36rem;
}

.section-heading span,
.active-filter {
  color: var(--muted);
  font-size: 0.93rem;
}

.active-filter {
  margin: -3px 4px 14px;
}

.post-list {
  display: grid;
  gap: 18px;
}

.post-card {
  display: grid;
  grid-template-columns: 238px minmax(0, 1fr);
  overflow: hidden;
  transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.post-cover {
  min-height: 190px;
  background-position: center;
  background-size: cover;
}

.post-body {
  padding: 22px 24px;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 0.84rem;
}

.post-card h3 {
  margin: 10px 0 8px;
  font-size: clamp(1.22rem, 3vw, 1.58rem);
  line-height: 1.35;
}

.post-card p {
  margin: 0;
  color: #5d6878;
  font-size: 0.97rem;
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 15px 0 18px;
}

.tag,
.filter-chip {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 3px 10px;
  border: 1px solid rgba(39, 167, 184, 0.22);
  border-radius: 999px;
  color: var(--primary-dark);
  background: rgba(39, 167, 184, 0.08);
  font-size: 0.82rem;
}

.post-read {
  padding: 9px 16px;
}

.sidebar {
  display: grid;
  align-content: start;
  gap: 18px;
}

.sidebar .card {
  padding: 20px;
}

.profile-card {
  text-align: center;
}

.avatar {
  display: grid;
  width: 118px;
  height: 118px;
  margin: 5px auto 15px;
  place-items: center;
  border-radius: 50%;
  overflow: hidden;
  background: #edf3f7;
  box-shadow: 0 12px 26px rgba(29, 44, 61, 0.16);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.avatar:hover {
  transform: translateY(-2px) rotate(2deg);
  box-shadow: 0 16px 30px rgba(29, 44, 61, 0.2);
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-card h2,
.side-card h2,
.notice-card h2 {
  margin: 0 0 10px;
  font-size: 1.08rem;
}

.profile-card h2 {
  margin-bottom: 8px;
  color: #454545;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 1.55rem;
  font-weight: 700;
}

.profile-card p,
.notice-card p {
  margin: 0;
  color: #687487;
  font-size: 0.93rem;
}

.profile-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 22px;
}

.profile-stats strong {
  display: block;
  color: var(--ink);
  font-size: 1.08rem;
}

.profile-stats span {
  color: var(--muted);
  font-size: 0.78rem;
}

.github-follow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  min-height: 54px;
  margin: 26px 0 18px;
  border-radius: var(--radius);
  color: #fff;
  background: #47aef0;
  box-shadow: 0 12px 24px rgba(71, 174, 240, 0.25);
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 1.05rem;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.github-follow:hover {
  transform: translateY(-2px);
  background: #2f9fe8;
  box-shadow: 0 16px 28px rgba(71, 174, 240, 0.32);
}

.github-mark,
.github-icon-link {
  display: inline-grid;
  place-items: center;
}

.github-mark svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.github-icon-link {
  width: 38px;
  height: 38px;
  margin: 0 auto 2px;
  color: #2d333b;
  border-radius: 50%;
  transition: color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.github-icon-link:hover {
  color: #000;
  background: rgba(45, 51, 59, 0.08);
  transform: translateY(-2px);
}

.github-icon-link svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

.mini-list,
.category-list,
.archive-list {
  display: grid;
  gap: 10px;
}

.mini-link,
.category-item,
.archive-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: #526071;
  font-size: 0.91rem;
}

.mini-link {
  align-items: flex-start;
  justify-content: flex-start;
  cursor: pointer;
}

.mini-link::before {
  content: "";
  flex: 0 0 7px;
  width: 7px;
  height: 7px;
  margin-top: 10px;
  border-radius: 50%;
  background: var(--primary);
}

.category-item,
.tag-cloud button {
  width: 100%;
  cursor: pointer;
}

.category-item:hover,
.mini-link:hover,
.archive-item:hover {
  color: var(--primary-dark);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.tag-cloud button {
  width: auto;
  border: 0;
}

.about-band {
  padding: 58px 18px 76px;
  background:
    linear-gradient(135deg, rgba(39, 167, 184, 0.08), rgba(230, 183, 94, 0.12)),
    #fff;
}

.about-inner {
  width: min(880px, 100%);
  margin: 0 auto;
  text-align: center;
}

.about-inner h2 {
  margin: 0 0 12px;
  font-size: 1.8rem;
}

.about-inner p {
  margin: 0;
  color: #5d6878;
}

.site-info-section {
  padding: 36px 18px 64px;
  background: #f7f8fa;
}

.site-info-card {
  width: min(430px, 100%);
  margin: 0 auto;
  padding: 34px 36px;
}

.site-info-card h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  color: #3f3f3f;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 1.45rem;
  font-weight: 500;
}

.site-info-icon {
  display: inline-grid;
  width: 28px;
  height: 28px;
  place-items: center;
}

.site-info-icon svg {
  width: 25px;
  height: 25px;
  fill: currentColor;
}

.site-info-grid {
  display: grid;
  gap: 13px;
  margin: 0;
}

.site-info-grid div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
}

.site-info-grid dt,
.site-info-grid dd {
  margin: 0;
  color: #434343;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 1.05rem;
}

.site-info-grid dd {
  min-width: 80px;
  text-align: right;
}

.reader {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: none;
  padding: 28px;
}

.reader.is-open {
  display: block;
}

.reader-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(17, 28, 42, 0.5);
  backdrop-filter: blur(10px);
}

.reader-panel {
  position: relative;
  overflow: auto;
  width: min(850px, 100%);
  max-height: calc(100vh - 56px);
  margin: 0 auto;
  padding: clamp(24px, 5vw, 46px);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 26px 70px rgba(15, 28, 42, 0.28);
}

.reader-close {
  position: sticky;
  top: 0;
  float: right;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  color: #fff;
  background: var(--ink);
  font-size: 1.4rem;
  line-height: 1;
}

.reader-meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.reader-panel h2 {
  clear: both;
  margin: 12px 0 10px;
  font-size: clamp(1.8rem, 5vw, 2.7rem);
  line-height: 1.25;
}

.reader-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 26px;
}

.reader-content h3 {
  margin: 28px 0 8px;
  font-size: 1.25rem;
}

.reader-content p {
  color: #4f5b6c;
}

.reader-content pre {
  overflow: auto;
  padding: 16px;
  border-radius: var(--radius);
  color: #e8f6f8;
  background: #1e2b36;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px 18px;
  padding: 26px 18px 34px;
  color: #69778a;
  background: #fff;
  text-align: center;
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

.deerflow-signature {
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #8390a1;
  font-size: 0.78rem;
  opacity: 0.82;
}

.deerflow-signature:hover {
  color: var(--primary-dark);
  opacity: 1;
}

.to-top {
  position: fixed;
  right: 22px;
  bottom: 24px;
  z-index: 30;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--primary);
  box-shadow: var(--soft-shadow);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.empty-state {
  padding: 28px;
  color: var(--muted);
  text-align: center;
}

@keyframes drift {
  to {
    background-position: 112px 112px, 210px 170px;
  }
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

@keyframes wheel {
  0% {
    opacity: 0;
    transform: translate(-50%, 0);
  }
  45% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translate(-50%, 12px);
  }
}

@media (max-width: 980px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .profile-card,
  .notice-card {
    grid-column: span 1;
  }
}

@media (max-width: 720px) {
  .site-header {
    height: 58px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 58px;
    left: 14px;
    right: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    border-radius: var(--radius);
    color: var(--ink);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--soft-shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 10px 12px;
  }

  .hero {
    min-height: 100vh;
    background-attachment: scroll;
  }

  .page-shell {
    width: min(100% - 18px, var(--content));
    margin-top: 20px;
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

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

  .post-cover {
    min-height: 170px;
  }

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

  .reader {
    padding: 12px;
  }

  .reader-panel {
    max-height: calc(100vh - 24px);
  }
}

@media (max-width: 430px) {
  .hero h1 {
    font-size: 2.72rem;
  }

  .post-body,
  .sidebar .card {
    padding: 17px;
  }

  .profile-stats {
    gap: 4px;
  }

  .site-footer {
    padding-bottom: 82px;
  }

  .site-info-card {
    padding: 28px 24px;
  }

  .site-info-grid div {
    gap: 12px;
  }

  .site-info-grid dt,
  .site-info-grid dd {
    font-size: 0.98rem;
  }
}