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

/* =============================================
   CSS 变量 & 重置
   ============================================= */
:root {
  --c-primary: #2D1B69;
  --c-accent: #FF4D1C;
  --c-light: #F5F0FF;
  --c-primary-dark: #1a0f45;
  --c-accent-dark: #cc3a10;
  --c-white: #ffffff;
  --c-text: #1a1a2e;
  --c-text-light: #5a5475;
  --c-border: #e0d8f5;
  --c-muted: #9b8ab8;
  --font-cond: 'Barlow Condensed', 'Arial Narrow', Arial, sans-serif;
  --font-body: 'Barlow', Arial, sans-serif;
  --radius: 0px;
  --radius-sm: 2px;
  --transition: 150ms ease;
  --nav-h: 110px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-light);
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

/* =============================================
   scroll-margin-top（固定导航补偿）
   ============================================= */
div[id] {
  scroll-margin-top: calc(var(--nav-h) + 8px);
}

/* =============================================
   页面包装
   ============================================= */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* =============================================
   顶部导航
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-primary);
  color: var(--c-white);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  border-bottom: 2px solid var(--c-accent);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-logo {
  height: 36px;
  width: auto;
}

.brand-text {
  font-family: var(--font-cond);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.search-form {
  display: flex;
  align-items: stretch;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.25);
}

.search-input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 8px 14px;
  width: 220px;
  min-height: 40px;
}

.search-input::placeholder {
  color: rgba(255,255,255,0.5);
}

.search-btn {
  background: var(--c-accent);
  border: none;
  cursor: pointer;
  color: var(--c-white);
  padding: 8px 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  transition: background var(--transition);
}

.search-btn:hover {
  background: var(--c-accent-dark);
}

.header-nav-row {
  padding: 0 24px;
  background: var(--c-primary-dark);
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.top-nav::-webkit-scrollbar {
  display: none;
}

.top-nav-link {
  display: flex;
  align-items: center;
  padding: 12px 18px;
  font-family: var(--font-cond);
  font-size: 1rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.03em;
  white-space: nowrap;
  min-height: 44px;
  border-right: 1px solid rgba(255,255,255,0.08);
  transition: color var(--transition), background var(--transition);
}

.top-nav-link:first-child {
  border-left: 1px solid rgba(255,255,255,0.08);
}

.top-nav-link:hover {
  color: var(--c-accent);
  background: rgba(255,77,28,0.1);
}

/* =============================================
   Hero
   ============================================= */
.hero-block {
  position: relative;
  min-height: 70vh;
  background: var(--c-primary);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg-text {
  position: absolute;
  bottom: -0.15em;
  right: -0.05em;
  font-family: var(--font-cond);
  font-size: clamp(6rem, 18vw, 16rem);
  font-weight: 700;
  color: rgba(255,255,255,0.04);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 60px 24px 60px 48px;
  max-width: 700px;
}

.hero-eyebrow {
  display: inline-block;
  background: var(--c-accent);
  color: var(--c-white);
  font-family: var(--font-cond);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 14px;
  margin-bottom: 20px;
}

.hero-h1 {
  font-family: var(--font-cond);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.1;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.65;
  margin-bottom: 32px;
  max-width: 500px;
}

.hero-cta {
  display: inline-block;
  background: var(--c-accent);
  color: var(--c-white);
  font-family: var(--font-cond);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 14px 36px;
  min-height: 50px;
  text-transform: uppercase;
  transition: background var(--transition);
}

.hero-cta:hover {
  background: var(--c-accent-dark);
}

.hero-shape {
  position: absolute;
  right: 0;
  top: 0;
  width: 40%;
  height: 100%;
  background: var(--c-accent);
  clip-path: polygon(20% 0, 100% 0, 100% 100%, 0% 100%);
  opacity: 0.08;
  pointer-events: none;
}

/* =============================================
   主内容区
   ============================================= */
.site-main {
  flex: 1;
  background: var(--c-light);
}

.wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.content-section {
  padding: 48px 0;
}

.content-article {
  width: 100%;
}

.content-with-aside {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  align-items: start;
}

.content-body {
  min-width: 0;
}

/* =============================================
   page.content 内部样式（7个div）
   ============================================= */
.content-body div {
  padding: 56px 0;
  border-bottom: 2px solid var(--c-border);
}

.content-body div:last-child {
  border-bottom: none;
}

.content-body h2 {
  font-family: var(--font-cond);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  color: var(--c-primary);
  letter-spacing: 0.03em;
  line-height: 1.15;
  margin-bottom: 8px;
}

.content-body h2 + .subtitle,
.content-body h2 + p {
  color: var(--c-text-light);
  font-size: 1rem;
  margin-bottom: 24px;
  line-height: 1.55;
}

.content-body h3 {
  font-family: var(--font-cond);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--c-primary);
  margin: 28px 0 10px;
}

.content-body p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--c-text);
  margin-bottom: 16px;
}

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

.content-body ul,
.content-body ol {
  padding-left: 0;
  margin-bottom: 16px;
}

.content-body ul li,
.content-body ol li {
  list-style: none;
  padding: 8px 0 8px 20px;
  position: relative;
  font-size: 1rem;
  line-height: 1.65;
  border-bottom: 1px solid var(--c-border);
}

.content-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--c-accent);
}

.content-body ol {
  counter-reset: ol-counter;
}

.content-body ol li {
  counter-increment: ol-counter;
}

.content-body ol li::before {
  content: counter(ol-counter, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 8px;
  font-family: var(--font-cond);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-accent);
}

.content-body strong {
  color: var(--c-primary);
  font-weight: 600;
}

.content-body a {
  color: var(--c-accent);
  border-bottom: 1px solid currentColor;
  transition: color var(--transition);
}

.content-body a:hover {
  color: var(--c-accent-dark);
}

.content-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
  font-size: 0.95rem;
}

.content-body th {
  background: var(--c-primary);
  color: var(--c-white);
  font-family: var(--font-cond);
  font-weight: 600;
  padding: 10px 14px;
  text-align: left;
}

.content-body td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--c-border);
}

.content-body tr:nth-child(even) td {
  background: rgba(45,27,105,0.04);
}

/* =============================================
   aside 侧边栏
   ============================================= */
.content-aside {
  position: sticky;
  top: calc(var(--nav-h) + 16px);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.aside-block {
  background: var(--c-primary);
  color: var(--c-white);
  padding: 24px;
}

.aside-title {
  font-family: var(--font-cond);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.aside-title + .subtitle,
.aside-title + p.subtitle {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 16px;
}

.aside-nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.aside-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 10px;
  font-family: var(--font-cond);
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  background: rgba(255,255,255,0.06);
  border-left: 3px solid transparent;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
  min-height: 40px;
}

.aside-link:hover {
  color: var(--c-white);
  background: rgba(255,77,28,0.2);
  border-left-color: var(--c-accent);
}

.aside-arrow {
  color: var(--c-accent);
  font-size: 1rem;
  flex-shrink: 0;
}

.aside-tip {
  background: var(--c-accent);
}

.aside-tip-title {
  font-family: var(--font-cond);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 4px;
}

.aside-tip-title + .subtitle {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
  margin-bottom: 12px;
}

.aside-tip-text {
  font-size: 0.9rem;
  line-height: 1.55;
  color: rgba(255,255,255,0.9);
  margin-bottom: 0;
}

/* =============================================
   页脚
   ============================================= */
.site-footer {
  background: var(--c-primary-dark);
  color: rgba(255,255,255,0.8);
}

.footer-cta-block {
  background: var(--c-accent);
  padding: 36px 24px;
}

.footer-cta-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-cta-label {
  font-family: var(--font-cond);
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-cta-headline {
  font-family: var(--font-cond);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: 0.02em;
  flex: 1;
}

.footer-cta-btn {
  display: inline-block;
  background: var(--c-primary);
  color: var(--c-white);
  font-family: var(--font-cond);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 12px 28px;
  min-height: 46px;
  display: flex;
  align-items: center;
  transition: background var(--transition);
}

.footer-cta-btn:hover {
  background: #13093a;
}

.footer-main-row {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.5fr 1.5fr;
  gap: 32px;
  padding: 40px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand-link {
  display: inline-block;
  margin-bottom: 14px;
}

.footer-logo {
  height: 32px;
  width: auto;
}

.footer-brand-text {
  font-family: var(--font-cond);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: 0.05em;
}

.footer-desc {
  font-size: 0.88rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.55);
}

/* 页脚导航：nav > dl > dt/dd > a */
.footer-nav-col {
  padding-top: 4px;
}

.footer-dl {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-dl dt,
.footer-dl dd {
  margin: 0;
  padding: 0;
}

.footer-dl dd a,
.footer-dl dt a {
  display: flex;
  align-items: center;
  padding: 8px 0;
  font-family: var(--font-cond);
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255,255,255,0.7);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color var(--transition);
  min-height: 40px;
}

.footer-dl dd a:hover,
.footer-dl dt a:hover {
  color: var(--c-accent);
}

.footer-keyword,
.footer-topic {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.45);
  line-height: 1.7;
  margin-bottom: 8px;
}

.footer-copyright {
  font-family: var(--font-cond);
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255,255,255,0.7);
  margin-bottom: 8px;
}

.footer-note {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  line-height: 1.55;
}

/* =============================================
   Scroll Reveal 动效
   ============================================= */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 300ms ease, transform 300ms ease;
  }

  .reveal.visible {
    opacity: 1;
    transform: none;
  }

  .stagger-list > * {
    opacity: 0;
    transform: translateX(-16px);
    transition: opacity 250ms ease, transform 250ms ease;
  }

  .stagger-list.visible > *:nth-child(1) { transition-delay: 0ms; }
  .stagger-list.visible > *:nth-child(2) { transition-delay: 60ms; }
  .stagger-list.visible > *:nth-child(3) { transition-delay: 120ms; }
  .stagger-list.visible > *:nth-child(4) { transition-delay: 180ms; }
  .stagger-list.visible > *:nth-child(5) { transition-delay: 240ms; }
  .stagger-list.visible > *:nth-child(6) { transition-delay: 300ms; }
  .stagger-list.visible > *:nth-child(7) { transition-delay: 360ms; }

  .stagger-list.visible > * {
    opacity: 1;
    transform: none;
  }
}

/* =============================================
   响应式
   ============================================= */
@media (max-width: 1024px) {
  .content-with-aside {
    grid-template-columns: 1fr 240px;
    gap: 28px;
  }

  .footer-main-row {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-h: 96px;
  }

  .header-top {
    padding: 10px 16px;
    flex-wrap: wrap;
    gap: 10px;
  }

  .search-input {
    width: 140px;
  }

  .header-nav-row {
    padding: 0 16px;
  }

  .top-nav-link {
    padding: 10px 12px;
    font-size: 0.9rem;
  }

  .hero-content {
    padding: 40px 16px;
  }

  .hero-block {
    min-height: 60vh;
  }

  .wrap {
    padding: 0 16px;
  }

  .content-with-aside {
    grid-template-columns: 1fr;
  }

  .content-aside {
    position: static;
  }

  .footer-cta-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .footer-cta-headline {
    font-size: 1.25rem;
  }

  .footer-main-row {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 28px 16px;
  }

  .footer-cta-block {
    padding: 24px 16px;
  }
}

@media (max-width: 480px) {
  .brand-text {
    font-size: 1.2rem;
  }

  .search-input {
    width: 100px;
  }

  .hero-h1 {
    font-size: 2rem;
  }

  .content-body div {
    padding: 36px 0;
  }

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

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