@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600;700&family=Fira+Sans:wght@300;400;500;600;700&display=swap');

/* ── 基础变量 ── */
:root {
  --c-primary: #56228b;
  --c-accent: #8b4513;
  --c-dark: #1f1726;
  --c-primary-light: #7a3fb5;
  --c-accent-light: #b05a1e;
  --c-glass: rgba(86,34,139,0.12);
  --c-glass-border: rgba(86,34,139,0.28);
  --c-bg: #120d1a;
  --c-bg2: #1a1126;
  --c-surface: #221630;
  --c-text: #ede8f5;
  --c-text-muted: #a89bc0;
  --c-hr: rgba(139,69,19,0.35);
  --radius-card: 20px;
  --radius-sm: 12px;
  --radius-btn: 50px;
  --shadow-card: 0 8px 32px rgba(86,34,139,0.22), 0 2px 8px rgba(139,69,19,0.12);
  --shadow-btn: 0 4px 18px rgba(86,34,139,0.38);
  --font-main: 'Fira Sans', system-ui, sans-serif;
  --font-mono: 'Fira Code', 'Courier New', monospace;
  --nav-h: 108px;
  scroll-behavior: smooth;
}

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

html {
  font-size: 17px;
  scroll-behavior: smooth;
  background: var(--c-bg);
  color: var(--c-text);
}

body {
  font-family: var(--font-main);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--c-bg);
  position: relative;
}

/* ── 有机背景 blob ── */
.blob-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.blob {
  position: absolute;
}
.blob-1 {
  top: -10vh;
  right: -8vw;
  width: min(70vw, 520px);
  height: auto;
  animation: blobFloat1 18s ease-in-out infinite alternate;
}
.blob-2 {
  bottom: 10vh;
  left: -12vw;
  width: min(55vw, 400px);
  height: auto;
  animation: blobFloat2 22s ease-in-out infinite alternate;
}
@keyframes blobFloat1 {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(3vw,4vh) scale(1.07); }
}
@keyframes blobFloat2 {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(-2vw,-3vh) scale(1.05); }
}
@media (prefers-reduced-motion: reduce) {
  .blob { animation: none !important; }
}

/* ── 顶部导航 ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(31,23,38,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-glass-border);
}
.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 2rem;
  gap: 1rem;
}
.brand-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.brand-logo {
  height: 36px;
  width: auto;
  border-radius: 8px;
}
.brand-name {
  font-family: var(--font-mono);
  font-size: 1.22rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  background: linear-gradient(90deg, var(--c-primary-light) 20%, var(--c-accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.4rem;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent) 100%);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-btn);
  text-decoration: none;
  box-shadow: var(--shadow-btn);
  transition: transform 0.18s, box-shadow 0.18s;
  white-space: nowrap;
  min-height: 44px;
}
.cta-btn:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 28px rgba(86,34,139,0.52);
}
.menu-row {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  padding: 0.35rem 2rem 0.5rem;
  flex-wrap: wrap;
  border-top: 1px solid rgba(86,34,139,0.18);
}
.nav-link {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--c-text-muted);
  text-decoration: none;
  padding: 0.5rem 0.82rem;
  border-radius: var(--radius-sm);
  transition: background 0.16s, color 0.16s;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}
.nav-link:hover {
  background: var(--c-glass);
  color: var(--c-text);
}

/* ── section scroll-margin ── */
section[id] {
  scroll-margin-top: var(--nav-h);
}

/* ── Hero ── */
.hero-wrap {
  position: relative;
  min-height: 45vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1;
  padding: 5vh 1.5rem 0;
  overflow: hidden;
}
.hero-inner {
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
  padding-bottom: 4rem;
}
.hero-h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, #c49aff 0%, var(--c-primary-light) 40%, var(--c-accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}
.hero-sub {
  font-size: 1.08rem;
  color: var(--c-text-muted);
  max-width: 540px;
  margin: 0 auto 1.6rem;
  line-height: 1.7;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 2.2rem;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent) 100%);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-btn);
  text-decoration: none;
  box-shadow: var(--shadow-btn);
  transition: transform 0.18s, box-shadow 0.18s;
  min-height: 48px;
}
.hero-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 36px rgba(86,34,139,0.55);
}
/* 斜切色带分割 */
.hero-divider {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent) 100%);
  clip-path: polygon(0 60%, 100% 0%, 100% 100%, 0% 100%);
  opacity: 0.22;
}

/* ── 主内容区 ── */
.site-main {
  position: relative;
  z-index: 1;
  padding: 3rem 1.5rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

.content-section {
  display: grid;
  grid-template-columns: 220px 1fr;
  grid-template-rows: auto 1fr;
  gap: 2rem 2.5rem;
  align-items: start;
}

/* aside 在左侧 */
.content-aside {
  grid-column: 1;
  grid-row: 1 / 3;
  position: sticky;
  top: calc(var(--nav-h) + 1rem);
}
.aside-inner {
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  padding: 1.4rem 1.2rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-card);
}
.aside-title {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-text-muted);
  letter-spacing: 0.06em;
  margin-bottom: 0.6rem;
}
.aside-nav-dl {
  list-style: none;
}
.aside-nav-dl dt {
  margin: 0;
  padding: 0;
}
.aside-link {
  display: flex;
  align-items: center;
  padding: 0.55rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--c-text-muted);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
  min-height: 40px;
}
.aside-link:hover {
  background: rgba(86,34,139,0.22);
  color: var(--c-text);
}

/* figure 装饰 */
.content-figure {
  grid-column: 1;
  grid-row: 2;
  display: flex;
  justify-content: center;
  padding-top: 1rem;
  pointer-events: none;
}
.figure-svg {
  width: 100%;
  max-width: 140px;
  height: auto;
  opacity: 0.55;
}

/* 正文区 */
.content-body {
  grid-column: 2;
  grid-row: 1 / 3;
}

/* ── 正文 section（page.content 内部的section）── */
.content-body section {
  margin-bottom: 3.5rem;
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  padding: 2rem 2rem 1.8rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.content-body section.visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .content-body section {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}
.content-body section::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  right: 0; height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  border-radius: var(--radius-card) var(--radius-card) 0 0;
}

/* ── 正文排版 ── */
.content-body h2 {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 0.5rem;
  letter-spacing: 0.01em;
}
.content-body h3 {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--c-primary-light);
  margin: 1.4rem 0 0.5rem;
}
.content-body hr {
  border: none;
  border-top: 1px solid var(--c-hr);
  margin: 0.8rem 0 1.2rem;
}
.content-body p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-text);
  margin-bottom: 0.9rem;
}
.content-body ul, .content-body ol {
  padding-left: 1.4rem;
  margin-bottom: 0.9rem;
}
.content-body li {
  line-height: 1.7;
  margin-bottom: 0.3rem;
  color: var(--c-text);
}
.content-body a {
  color: var(--c-primary-light);
  text-decoration: underline;
  text-decoration-color: rgba(122,63,181,0.38);
  transition: color 0.15s;
}
.content-body a:hover {
  color: var(--c-accent-light);
}
.content-body strong {
  color: #d4b8ff;
  font-weight: 600;
}
.content-body code {
  font-family: var(--font-mono);
  background: rgba(86,34,139,0.22);
  border: 1px solid rgba(86,34,139,0.3);
  border-radius: 6px;
  padding: 0.1em 0.45em;
  font-size: 0.9em;
}
.content-body pre {
  background: var(--c-dark);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
  overflow-x: auto;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
}
.content-body blockquote {
  border-left: 3px solid var(--c-primary);
  padding: 0.6rem 1rem;
  margin: 1rem 0;
  background: rgba(86,34,139,0.1);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--c-text-muted);
}
.content-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1rem;
  font-size: 0.93rem;
}
.content-body th {
  background: rgba(86,34,139,0.28);
  padding: 0.6rem 0.9rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
}
.content-body td {
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid rgba(86,34,139,0.15);
}

/* ── HR ── */
hr {
  border: none;
  border-top: 1px solid var(--c-hr);
  margin: 0.7rem 0 1rem;
}

/* ── 页脚 ── */
.site-footer {
  position: relative;
  z-index: 1;
  background: linear-gradient(160deg, var(--c-bg2) 0%, var(--c-dark) 100%);
  border-top: 1px solid var(--c-glass-border);
  padding: 3rem 2rem 0;
}
.footer-top {
  max-width: 1100px;
  margin: 0 auto 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(86,34,139,0.2);
}
.footer-contact-title {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 0.4rem;
}
.footer-contact-desc {
  color: var(--c-text-muted);
  font-size: 0.93rem;
  margin-bottom: 0.6rem;
}
.footer-email {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--c-primary-light);
}
.footer-cols {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding-bottom: 2.5rem;
}
.footer-dl {
  list-style: none;
}
.footer-dl-heading {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-accent-light);
  letter-spacing: 0.07em;
  margin-bottom: 0.8rem;
}
.footer-dl dd {
  margin: 0;
  padding: 0;
  margin-bottom: 0.4rem;
}
.footer-brand-desc {
  color: var(--c-text-muted);
  font-size: 0.88rem;
  line-height: 1.65;
  margin-bottom: 0.5rem;
}
.footer-kw {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: rgba(168,155,192,0.6);
}
.footer-link {
  color: var(--c-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s;
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0.1rem 0;
}
.footer-link:hover {
  color: var(--c-primary-light);
}
.footer-tip {
  font-size: 0.8rem;
  color: rgba(168,155,192,0.5);
  margin-top: 0.6rem;
  line-height: 1.5;
}
.footer-bar {
  border-top: 1px solid rgba(86,34,139,0.18);
  padding: 1.1rem 0;
  max-width: 1100px;
  margin: 0 auto;
}
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: rgba(168,155,192,0.5);
  text-align: center;
}

/* ── 响应式 ── */
@media (max-width: 900px) {
  .content-section {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }
  .content-aside {
    grid-column: 1;
    grid-row: auto;
    position: relative;
    top: auto;
  }
  .content-figure {
    display: none;
  }
  .content-body {
    grid-column: 1;
    grid-row: auto;
  }
  .footer-cols {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 640px) {
  .brand-row {
    padding: 0.6rem 1rem;
  }
  .menu-row {
    padding: 0.3rem 1rem 0.4rem;
    gap: 0.05rem;
  }
  .nav-link {
    font-size: 0.78rem;
    padding: 0.5rem 0.52rem;
    min-height: 40px;
  }
  .hero-wrap {
    min-height: 44vh;
    padding-top: 4vh;
  }
  .site-main {
    padding: 2rem 1rem 3rem;
  }
  .content-body section {
    padding: 1.4rem 1.1rem;
  }
  .footer-cols {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .footer-top, .footer-cols, .footer-bar {
    padding-left: 0;
    padding-right: 0;
  }
  .site-footer {
    padding: 2rem 1rem 0;
  }
}

/* ── Stagger scroll reveal ── */
.content-body section:nth-child(1) { transition-delay: 0.05s; }
.content-body section:nth-child(2) { transition-delay: 0.12s; }
.content-body section:nth-child(3) { transition-delay: 0.19s; }
.content-body section:nth-child(4) { transition-delay: 0.26s; }
.content-body section:nth-child(5) { transition-delay: 0.33s; }
.content-body section:nth-child(6) { transition-delay: 0.40s; }
.content-body section:nth-child(7) { transition-delay: 0.47s; }