/* =============================================
   华年集 · 全局基础样式
   Base Styles - HuaNianJi
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;600;700;900&family=Noto+Sans+SC:wght@300;400;500;700&family=Cinzel:wght@400;600;700&display=swap');

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

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

body {
  font-family: var(--font-body);
  background-color: var(--color-ink-black);
  color: var(--color-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── 滚动条美化 ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-deep-black); }
::-webkit-scrollbar-thumb {
  background: var(--color-cloud-blue-3);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-cloud-blue); }

/* ── 选中文字 ── */
::selection {
  background: var(--color-cloud-glow);
  color: var(--color-cloud-blue-2);
}

/* ── 图片 ── */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ── 链接 ── */
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--ease-fast);
}

/* ── 按钮基础 ── */
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ── 容器 ── */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (max-width: 768px) {
  .container { padding: 0 var(--space-4); }
}

/* ── 段落间距 ── */
p { line-height: 1.8; }

/* ── 标题基础 ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.3;
  color: var(--color-text-primary);
}

/* ── 分隔线 ── */
.divider {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-brand), transparent);
  margin: var(--space-4) auto;
}

.divider--left {
  margin-left: 0;
}

/* ── 章节通用 ── */
.section {
  padding: var(--space-24) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-tag {
  font-family: var(--font-en);
  font-size: var(--text-xs);
  letter-spacing: 0.3em;
  color: var(--color-brand-light);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
  display: block;
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-brand-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ── 按钮组件 ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all var(--ease-normal);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--ease-fast);
}

.btn:hover::before { opacity: 1; }

/* 主按钮 */
.btn--primary {
  background: linear-gradient(135deg, var(--color-brand-dark), var(--color-brand));
  color: #fff;
  border-color: var(--color-brand);
  box-shadow: 0 0 20px rgba(107, 79, 160, 0.35);
}
.btn--primary::before {
  background: linear-gradient(135deg, var(--color-brand), var(--color-brand-light));
}
.btn--primary:hover {
  box-shadow: var(--shadow-glow-blue);
  transform: translateY(-2px);
}

/* 轮廓按钮 */
.btn--outline {
  background: transparent;
  color: var(--color-brand-light);
  border-color: var(--color-border-normal);
}
.btn--outline::before {
  background: var(--color-brand-glow);
}
.btn--outline:hover {
  border-color: var(--color-brand);
  color: var(--color-text-primary);
}

/* 金色强调按钮 */
.btn--accent {
  background: linear-gradient(135deg, var(--color-copper), var(--color-gold));
  color: #1a0f00;
  border-color: var(--color-gold);
  box-shadow: 0 0 20px rgba(212, 168, 90, 0.35);
}
.btn--accent:hover {
  box-shadow: var(--shadow-glow-gold);
  transform: translateY(-2px);
}

/* 大号按钮 */
.btn--lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-lg);
}

/* ── 卡片组件 ── */
.card {
  background: var(--color-surface-dark);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--ease-normal);
  position: relative;
}

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

/* ── 发光边框卡片 ── */
.card--glow {
  background: var(--color-surface-dark);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  position: relative;
}

.card--glow::before {
  content: '';
  position: absolute;
  inset: -1px;
  background: linear-gradient(135deg, var(--color-brand), transparent, var(--color-brand-dark));
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--ease-normal);
  z-index: -1;
}

.card--glow:hover::before { opacity: 1; }

/* ── 徽章 ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.badge--blue {
  background: rgba(107, 79, 160, 0.15);
  color: var(--color-brand-light);
  border: 1px solid var(--color-border-subtle);
}

.badge--red {
  background: rgba(212, 168, 90, 0.12);
  color: var(--color-gold-bright);
  border: 1px solid rgba(212, 168, 90, 0.25);
}

/* ── 背景装饰粒子层 ── */
.bg-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

/* ── 辉光圆 ── */
.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.glow-orb--blue {
  background: radial-gradient(circle, rgba(107, 79, 160, 0.28) 0%, transparent 70%);
}

.glow-orb--red {
  background: radial-gradient(circle, rgba(212, 168, 90, 0.2) 0%, transparent 70%);
}

/* ── 动画关键帧 ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-12px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(107, 79, 160, 0.35); }
  50%       { box-shadow: 0 0 40px rgba(107, 79, 160, 0.65); }
}

@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position:  200% center; }
}

@keyframes rotate-slow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes line-expand {
  from { width: 0; opacity: 0; }
  to   { width: 60px; opacity: 1; }
}

/* ── 进场动画类 ── */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-delay-1 { transition-delay: 0.1s; }
.animate-delay-2 { transition-delay: 0.2s; }
.animate-delay-3 { transition-delay: 0.3s; }
.animate-delay-4 { transition-delay: 0.4s; }
.animate-delay-5 { transition-delay: 0.5s; }

/* ── 工具类 ── */
.text-center  { text-align: center; }
.text-left    { text-align: left; }
.text-gradient {
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-brand-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-gradient-red {
  background: linear-gradient(135deg, #fef0c2 0%, var(--color-gold-bright) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── 响应式隐藏 ── */
@media (max-width: 768px) {
  .hide-mobile { display: none !important; }
  .section { padding: var(--space-16) 0; }
  .section-title { font-size: var(--text-3xl); }
}

@media (min-width: 769px) {
  .hide-desktop { display: none !important; }
}