@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,500;0,700;1,400&display=swap');

/* ===== 基础重置 & 变量 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --c-primary: #6514ff;
  --c-secondary: #bf00ff;
  --c-dark: #1c1726;
  --c-dark-mid: #251e35;
  --c-dark-light: #2f2748;
  --c-neon-glow: rgba(101, 20, 255, 0.5);
  --c-secondary-glow: rgba(191, 0, 255, 0.4);
  --c-text: #f0eaf8;
  --c-text-muted: #b89fd4;
  --c-text-dim: #7a6a9a;
  --c-border: rgba(191, 0, 255, 0.2);
  --c-glass: rgba(44, 33, 65, 0.55);
  --c-glass-border: rgba(191, 0, 255, 0.25);
  --radius-card: 28px;
  --radius-sm: 12px;
  --radius-xs: 6px;
  --gap-xl: 64px;
  --gap-lg: 48px;
  --gap-md: 32px;
  --gap-sm: 20px;
  --gap-xs: 12px;
  --nav-h: 68px;
  --font: 'Roboto', system-ui, -apple-system, sans-serif;
  --transition-std: 200ms ease;
  --transition-complex: 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  background-color: var(--c-dark);
  color: var(--c-text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ===== 滚动偏移（固定导航补偿）===== */
section[id] {
  scroll-margin-top: calc(var(--nav-h) + 16px);
}

/* ===== 动态背景纹理 ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse 80% 50% at 20% 20%, rgba(101,20,255,0.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(191,0,255,0.14) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
  animation: bgPulse 8s ease-in-out infinite alternate;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 39px,
    rgba(101,20,255,0.04) 39px,
    rgba(101,20,255,0.04) 40px
  ),
  repeating-linear-gradient(
    90deg,
    transparent,
    transparent 39px,
    rgba(101,20,255,0.04) 39px,
    rgba(101,20,255,0.04) 40px
  );
  pointer-events: none;
  z-index: 0;
}

@keyframes bgPulse {
  0%   { opacity: 0.7; }
  100% { opacity: 1; }
}

/* ===== 排版基础 ===== */
a {
  color: var(--c-secondary);
  text-decoration: none;
  transition: color var(--transition-std);
}
a:hover { color: #fff; }
a:focus-visible {
  outline: 2px solid var(--c-secondary);
  outline-offset: 3px;
  border-radius: 3px;
}

img { max-width: 100%; height: auto; display: block; }

ul, ol { list-style: none; }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(28, 23, 38, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--c-border);
  box-shadow: 0 2px 24px rgba(101,20,255,0.15);
}

.header-inner {
  position: relative;
  z-index: 1;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 var(--gap-sm);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
}

.brand-block { flex-shrink: 0; }

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-logo-img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, #c47fff, #6514ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.main-nav {
  flex: 1;
  overflow: hidden;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 2px;
  margin: 0;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--c-text-muted);
  border-radius: var(--radius-xs);
  white-space: nowrap;
  transition: color var(--transition-std), background var(--transition-std);
  min-height: 40px;
}

.nav-links a:hover {
  color: #fff;
  background: rgba(101, 20, 255, 0.25);
}

/* ===== 搜索框 ===== */
.header-search { flex-shrink: 0; }

.search-form {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--c-border);
  border-radius: 24px;
  overflow: hidden;
  transition: border-color var(--transition-std), box-shadow var(--transition-std);
}

.search-form:focus-within {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(101,20,255,0.2);
}

.search-input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--c-text);
  font-family: var(--font);
  font-size: 0.875rem;
  padding: 8px 14px;
  width: 180px;
  min-height: 40px;
}

.search-input::placeholder { color: var(--c-text-dim); }

.search-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--c-text-muted);
  padding: 0 14px;
  height: 40px;
  display: flex;
  align-items: center;
  transition: color var(--transition-std);
}

.search-btn:hover { color: var(--c-secondary); }

/* ===== Hero ===== */
.hero-section {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  overflow: hidden;
  z-index: 1;
  background: linear-gradient(135deg, var(--c-dark) 0%, #211839 60%, #2a1050 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1320px;
  width: 100%;
  margin: 0 auto;
  padding: var(--gap-xl) var(--gap-sm);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
}

.hero-eyebrow {
  margin-bottom: var(--gap-sm);
}

.eyebrow-tag {
  display: inline-block;
  padding: 6px 18px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary));
  border-radius: 4px;
  color: #fff;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 800px;
  background: linear-gradient(135deg, #fff 20%, #c47fff 60%, var(--c-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--gap-sm);
  animation: heroFadeIn 0.8s ease both;
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--c-text-muted);
  max-width: 560px;
  line-height: 1.7;
  animation: heroFadeIn 0.8s 0.15s ease both;
}

@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 斜切色带 */
.hero-slash {
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 120px;
  background: var(--c-dark);
  clip-path: polygon(0 60%, 100% 0, 100% 100%, 0 100%);
  z-index: 2;
}

/* 几何装饰 */
.hero-geo-deco {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

.geo-circle {
  position: absolute;
  border-radius: 50%;
  border: 2px solid rgba(191, 0, 255, 0.25);
  animation: geoSpin 20s linear infinite;
}

.geo-c1 {
  width: 420px; height: 420px;
  top: -120px; left: -80px;
  background: radial-gradient(circle, rgba(101,20,255,0.12) 0%, transparent 70%);
  animation-direction: normal;
}

.geo-c2 {
  width: 280px; height: 280px;
  bottom: 60px; left: 15%;
  border-color: rgba(101,20,255,0.2);
  background: radial-gradient(circle, rgba(191,0,255,0.08) 0%, transparent 70%);
  animation-direction: reverse;
  animation-duration: 14s;
}

.geo-dot-grid {
  position: absolute;
  top: 10%;
  right: 5%;
  width: 200px;
  height: 200px;
  background-image: radial-gradient(circle, rgba(191,0,255,0.35) 1.5px, transparent 1.5px);
  background-size: 20px 20px;
  animation: dotDrift 6s ease-in-out infinite alternate;
}

@keyframes geoSpin {
  from { transform: rotate(0deg) scale(1); }
  to   { transform: rotate(360deg) scale(1.05); }
}

@keyframes dotDrift {
  from { transform: translate(0, 0); opacity: 0.5; }
  to   { transform: translate(8px, -8px); opacity: 1; }
}

/* ===== 主内容区 ===== */
.site-main {
  position: relative;
  z-index: 1;
}

.content-section {
  position: relative;
  max-width: 1320px;
  margin: 0 auto;
  padding: var(--gap-xl) var(--gap-sm);
  display: grid;
  grid-template-columns: 1fr 260px;
  grid-template-rows: auto 1fr;
  gap: var(--gap-lg);
  align-items: start;
}

.content-figure {
  grid-column: 1 / -1;
  grid-row: 1;
  display: block;
  height: 6px;
  overflow: visible;
  margin: 0;
}

.fig-block {
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-secondary), transparent);
}

/* ===== 侧边栏 aside ===== */
.content-aside {
  grid-column: 2;
  grid-row: 2;
  position: sticky;
  top: calc(var(--nav-h) + 20px);
  background: var(--c-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  padding: var(--gap-md);
  box-shadow: 0 8px 32px rgba(101,20,255,0.15);
}

.aside-title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-secondary);
  margin-bottom: var(--gap-sm);
}

.aside-title span {
  display: inline-block;
}

.aside-nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.aside-nav-link {
  display: block;
  padding: 8px 12px;
  font-size: 0.875rem;
  color: var(--c-text-muted);
  border-radius: var(--radius-xs);
  border-left: 2px solid transparent;
  transition: all var(--transition-std);
  min-height: 40px;
  line-height: 1.5;
  display: flex;
  align-items: center;
}

.aside-nav-link:hover {
  color: #fff;
  border-left-color: var(--c-secondary);
  background: rgba(191,0,255,0.1);
  padding-left: 16px;
}

/* ===== 正文内容 ===== */
.page-content-body {
  grid-column: 1;
  grid-row: 2;
  min-width: 0;
}

/* page.content 里的通用样式 */
.page-content-body section {
  margin-bottom: var(--gap-xl);
  padding-bottom: var(--gap-xl);
  border-bottom: 1px solid rgba(191,0,255,0.1);
}

.page-content-body section:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.page-content-body h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: var(--gap-sm);
  background: linear-gradient(135deg, #fff, #c47fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* h2 > span 装饰结构 */
.page-content-body h2 span {
  display: inline;
}

.page-content-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-text);
  margin: var(--gap-md) 0 var(--gap-xs);
}

.page-content-body h3 span {
  display: inline;
}

.page-content-body p {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--c-text-muted);
  margin-bottom: 1.2em;
}

.page-content-body p:last-child { margin-bottom: 0; }

.page-content-body ul,
.page-content-body ol {
  padding-left: 1.5em;
  margin-bottom: 1.2em;
  list-style: none;
}

.page-content-body ul > li {
  position: relative;
  padding-left: 1.4em;
  margin-bottom: 0.6em;
  color: var(--c-text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.page-content-body ul > li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
}

.page-content-body ol {
  counter-reset: ol-ctr;
  list-style: none;
}

.page-content-body ol > li {
  counter-increment: ol-ctr;
  position: relative;
  padding-left: 2.2em;
  margin-bottom: 0.6em;
  color: var(--c-text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.page-content-body ol > li::before {
  content: counter(ol-ctr);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.5em;
  height: 1.5em;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  border-radius: 50%;
  color: #fff;
}

.page-content-body a {
  color: var(--c-secondary);
  text-decoration: underline;
  text-decoration-color: rgba(191,0,255,0.4);
  text-underline-offset: 3px;
}

.page-content-body a:hover {
  color: #fff;
  text-decoration-color: #fff;
}

.page-content-body strong {
  color: var(--c-text);
  font-weight: 700;
}

.page-content-body em {
  color: #c47fff;
  font-style: italic;
}

.page-content-body blockquote {
  border-left: 3px solid var(--c-primary);
  padding: var(--gap-sm) var(--gap-md);
  background: rgba(101,20,255,0.1);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: var(--gap-sm) 0;
}

.page-content-body blockquote p { color: var(--c-text); }

.page-content-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5em;
  font-size: 0.95rem;
}

.page-content-body th {
  background: rgba(101,20,255,0.25);
  color: var(--c-text);
  padding: 10px 16px;
  text-align: left;
  font-weight: 700;
}

.page-content-body td {
  padding: 10px 16px;
  border-bottom: 1px solid rgba(191,0,255,0.1);
  color: var(--c-text-muted);
}

.page-content-body tr:hover td {
  background: rgba(101,20,255,0.06);
}

/* 卡片（page.content 里可能有 .card 类名）*/
.page-content-body .card,
.content-card {
  background: var(--c-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  padding: var(--gap-md);
  transition: border-color var(--transition-std), box-shadow var(--transition-std), transform var(--transition-complex);
}

.page-content-body .card:hover,
.content-card:hover {
  border-color: var(--c-secondary);
  box-shadow: 0 12px 40px rgba(191,0,255,0.2);
  transform: translateY(-3px);
}

/* ===== Scroll Reveal ===== */
.reveal-section {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 页脚 ===== */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--c-border);
  background: var(--c-dark-mid);
  margin-top: var(--gap-xl);
}

.footer-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: var(--gap-lg) var(--gap-sm) var(--gap-md);
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: var(--gap-md) var(--gap-lg);
  align-items: start;
}

.footer-brand {
  grid-column: 1;
}

.footer-brand-link { margin-bottom: var(--gap-xs); display: inline-flex; }

.footer-desc {
  font-size: 0.875rem;
  color: var(--c-text-dim);
  line-height: 1.6;
  margin-top: var(--gap-xs);
  max-width: 320px;
}

.footer-nav {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 4px;
  align-content: start;
}

.footer-nav a {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  font-size: 0.875rem;
  color: var(--c-text-dim);
  border: 1px solid rgba(191,0,255,0.12);
  border-radius: var(--radius-xs);
  transition: all var(--transition-std);
  min-height: 40px;
}

.footer-nav a:hover {
  color: #fff;
  border-color: var(--c-secondary);
  background: rgba(191,0,255,0.1);
}

.footer-copy {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(191,0,255,0.1);
  padding-top: var(--gap-sm);
  font-size: 0.8rem;
  color: var(--c-text-dim);
  text-align: center;
}

/* ===== 工具类 ===== */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

/* ===== 移动端响应 ===== */
@media (max-width: 1024px) {
  .content-section {
    grid-template-columns: 1fr;
  }
  .content-figure { grid-column: 1; }
  .content-aside {
    grid-column: 1;
    grid-row: auto;
    position: static;
  }
  .aside-nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
  }
  .aside-nav-link {
    border-left: none;
    border: 1px solid rgba(191,0,255,0.2);
    border-radius: var(--radius-xs);
    padding: 8px 14px;
  }
  .aside-nav-link:hover {
    padding-left: 14px;
    border-color: var(--c-secondary);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-h: 60px;
    --gap-xl: 48px;
    --gap-lg: 36px;
    --gap-md: 24px;
  }

  .header-inner {
    gap: 12px;
    padding: 0 16px;
  }

  .main-nav {
    display: none;
  }

  .search-input {
    width: 120px;
  }

  .hero-inner {
    padding: var(--gap-lg) 16px;
    text-align: left;
    align-items: flex-start;
  }

  .hero-title {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .hero-desc {
    font-size: 1rem;
  }

  .content-section {
    padding: var(--gap-lg) 16px;
    gap: var(--gap-md);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    padding: var(--gap-md) 16px;
  }

  .footer-nav {
    grid-column: 1;
  }

  .geo-c1 {
    width: 260px;
    height: 260px;
    top: -60px;
    left: -60px;
  }

  .geo-c2 {
    width: 180px;
    height: 180px;
  }

  .geo-dot-grid {
    width: 120px;
    height: 120px;
    right: 2%;
  }
}

@media (max-width: 480px) {
  .brand-name {
    font-size: 1.05rem;
  }

  .search-input {
    width: 80px;
    font-size: 0.8rem;
  }

  .page-content-body h2 {
    font-size: 1.5rem;
  }

  .eyebrow-tag {
    font-size: 0.7rem;
    letter-spacing: 0.08em;
  }
}

/* ===== prefers-reduced-motion ===== */
@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;
  }
  .reveal-section {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

button[aria-expanded]{min-width:44px;min-height:44px}