/* =========================================================
   xiangxiangxu.com · 首页
   极简蓝白科技风
   ========================================================= */

:root {
  --bg: #f5f9ff;
  --surface: #ffffff;
  --ink: #0a1b33;
  --muted: #5d7391;
  --blue: #1d4ed8;
  --blue-soft: #3b82f6;
  --cyan: #06b6d4;
  --line: #dce8f8;
  --line-strong: #c3d7ef;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Code", Consolas,
    "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --max: 1080px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  background-color: var(--bg);
  background-image:
    radial-gradient(52rem 40rem at 88% -12%, rgba(59, 130, 246, 0.18), transparent 62%),
    radial-gradient(42rem 32rem at -12% 28%, rgba(6, 182, 212, 0.12), transparent 62%),
    linear-gradient(rgba(29, 78, 216, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 78, 216, 0.045) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
  background-attachment: fixed, fixed, scroll, scroll;
}

a {
  color: var(--blue);
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  width: min(var(--max), calc(100% - 2.5rem));
  margin-inline: auto;
}

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(245, 249, 255, 0.8);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.8rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
}

.logo__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--cyan) 100%);
  color: #fff;
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 800;
  box-shadow: 0 8px 20px -8px rgba(29, 78, 216, 0.65);
}

.nav {
  display: flex;
  gap: 0.2rem;
}

.nav a {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: var(--muted);
  text-decoration: none;
  padding: 0.38rem 0.8rem;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav a:hover {
  color: var(--blue);
  background: rgba(29, 78, 216, 0.06);
}

.nav a[aria-current="page"] {
  color: var(--blue);
  background: rgba(29, 78, 216, 0.08);
  font-weight: 600;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: #0f766e;
}

.status i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.14);
  animation: status-pulse 2.6s ease-in-out infinite;
}

@keyframes status-pulse {
  50% {
    box-shadow: 0 0 0 7px rgba(16, 185, 129, 0.05);
  }
}

/* ---------- Hero ---------- */
.hero {
  display: grid;
  gap: 3rem;
  align-items: center;
  padding-block: 5.5rem 3.2rem;
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 2.5rem;
  }
}

.eyebrow {
  margin: 0 0 1.2rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--blue);
}

.eyebrow::before {
  content: "// ";
  color: var(--cyan);
}

.hero h1 {
  margin: 0;
  font-size: clamp(3.2rem, 9vw, 6.2rem);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.045em;
}

.hero h1 span {
  background: linear-gradient(100deg, var(--blue) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lead {
  margin: 1.5rem 0 0;
  max-width: 32rem;
  font-size: 1.04rem;
  color: var(--muted);
}

/* ---------- 终端卡片 ---------- */
.terminal {
  position: relative;
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow:
    0 30px 60px -32px rgba(13, 52, 120, 0.4),
    inset 0 1px 0 #fff;
  overflow: hidden;
}

.terminal__bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 0.9rem;
  background: #f8fbff;
  border-bottom: 1px solid var(--line);
}

.terminal__bar span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #d6e4f5;
}

.terminal__bar span:nth-child(1) {
  background: #ffb3c6;
}

.terminal__bar span:nth-child(2) {
  background: #ffe08a;
}

.terminal__bar span:nth-child(3) {
  background: #9be6c9;
}

.terminal__bar em {
  margin-left: auto;
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.64rem;
  color: var(--muted);
}

.terminal pre {
  margin: 0;
  padding: 1.1rem 1.2rem 1.35rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.9;
  color: #26415f;
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal code {
  font-family: inherit;
}

.cmd {
  color: var(--blue);
  font-weight: 700;
}

.cursor {
  display: inline-block;
  width: 0.55em;
  height: 1em;
  vertical-align: -2px;
  background: var(--blue);
  animation: blink 1.1s steps(1) infinite;
}

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

/* ---------- 雏草姬入口 ---------- */
.gate-section {
  padding-block: 2.4rem 0;
}

.gate {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 1.4rem;
  padding: 1.5rem;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  background:
    radial-gradient(30rem 20rem at 100% 0%, rgba(244, 114, 182, 0.16), transparent 62%),
    radial-gradient(26rem 20rem at 0% 100%, rgba(29, 78, 216, 0.1), transparent 60%),
    rgba(255, 255, 255, 0.74);
  box-shadow:
    0 26px 60px -38px rgba(13, 52, 120, 0.5),
    inset 0 1px 0 #fff;
  color: inherit;
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.gate::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--cyan) 45%, #f472b6 100%);
  opacity: 0.85;
}

@media (min-width: 760px) {
  .gate {
    grid-template-columns: auto 1fr auto;
    gap: 2rem;
    padding: 1.8rem 2rem;
  }
}

.gate:hover {
  transform: translateY(-2px);
  border-color: #f0c3d8;
  box-shadow:
    0 34px 70px -36px rgba(13, 52, 120, 0.55),
    inset 0 1px 0 #fff;
}

.gate__art {
  width: clamp(84px, 14vw, 128px);
  aspect-ratio: 1;
  overflow: hidden;
  border: 1px solid #f6d2e3;
  border-radius: 14px;
  background: #ffeef6;
  box-shadow: 0 14px 30px -16px rgba(219, 39, 119, 0.5);
}

.gate__art img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gate__eyebrow {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.18em;
  color: #db2777;
}

.gate h2 {
  margin: 0.3rem 0 0;
  font-size: clamp(1.45rem, 3vw, 1.9rem);
  letter-spacing: -0.02em;
}

.gate__desc {
  margin: 0.5rem 0 0;
  max-width: 38rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}

.gate__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
}

.gate__tags li {
  padding: 0.18rem 0.6rem;
  border: 1px solid rgba(244, 114, 182, 0.24);
  border-radius: 999px;
  background: rgba(244, 114, 182, 0.1);
  font-family: var(--mono);
  font-size: 0.64rem;
  color: #9d4266;
}

.gate__go {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  grid-column: 1 / -1;
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--blue);
  white-space: nowrap;
}

.gate__go b {
  font-size: 1rem;
  transition: transform 0.3s ease;
}

@media (min-width: 760px) {
  .gate__go {
    grid-column: auto;
  }
}

.gate:hover .gate__go b {
  transform: translateX(6px);
}

/* ---------- 关于 ---------- */
.note {
  max-width: 46rem;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.note p {
  margin: 0 0 0.9rem;
  font-size: 0.94rem;
  color: #33475f;
}

.note p:last-child {
  margin-bottom: 0;
}

/* ---------- 页脚 ---------- */
.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-block: 1.5rem 3rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--blue);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

/* ---------- 响应式 ---------- */
@media (max-width: 620px) {
  .wrap {
    width: calc(100% - 1.5rem);
  }

  .hero {
    padding-block: 3.5rem 2rem;
  }

  .status {
    display: none;
  }

  .gate-section {
    padding-top: 1.8rem;
  }

  .note {
    margin-top: 2.4rem;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .status i,
  .cursor,
  .terminal {
    animation: none;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
  }
}

/* =========================================================
   404 页
   ========================================================= */

.status--lost {
  color: #b45309;
}

.status--lost i {
  background: #f59e0b;
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.16);
  animation: none;
}

.notfound {
  min-height: calc(100vh - 20rem);
  padding-block: 4.5rem 3rem;
}

.notfound__code {
  margin: 0;
  font-size: clamp(6rem, 20vw, 12rem);
  font-weight: 800;
  line-height: 0.84;
  letter-spacing: -0.06em;
  background: linear-gradient(118deg, var(--blue) 6%, var(--cyan) 94%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.notfound__lead {
  max-width: 28rem;
  margin: 1.5rem 0 0;
  font-size: 0.98rem;
  color: var(--muted);
}

.notfound__log {
  max-width: 34rem;
  margin-top: 2rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.86);
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.9;
  color: #33475f;
  box-shadow: 0 10px 28px rgba(15, 45, 90, 0.06);
}

.notfound__log p {
  margin: 0;
}

.notfound__log .cmd {
  margin-right: 0.5rem;
}

.notfound__log-err {
  color: #b91c1c;
}

.notfound__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.notfound__actions a {
  display: inline-flex;
  align-items: center;
  padding: 0.62rem 1.2rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.notfound__actions a:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(120deg, var(--blue), var(--blue-soft));
  box-shadow: 0 10px 22px rgba(29, 78, 216, 0.22);
}

.btn-ghost {
  color: var(--blue);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line-strong);
}

.btn-ghost:hover {
  box-shadow: 0 10px 22px rgba(15, 45, 90, 0.08);
}