@charset "UTF-8";

/* ========================================================
   SYMPHONY STUDIO｜星分翼 全局视觉规范与设计系统 Tokens
   基于《星分翼网站_AI还原开发说明书.md》
======================================================== */

:root {
  --color-ivory: #F4F0E8;
  --color-ink: #1D1C1A;
  --color-champagne: #B89B66;
  --color-champagne-light: #DFC79B;
  --color-champagne-glow: rgba(184, 155, 102, 0.25);
  --color-night: #121B2A;
  --color-night-card: #182337;
  --color-pine: #35574B;
  --color-paper: #FCFAF5;
  --color-muted: #7E7C77;
  
  --font-serif: "Cormorant Garamond", "Songti SC", "Source Han Serif SC", "SimSun", Georgia, serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  
  --header-height: 84px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease-out;
}

/* 基础重置与排版 */
html {
  scroll-behavior: smooth;
  background-color: var(--color-ivory);
  color: var(--color-ink);
  font-family: var(--font-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

/* 锚点滚动留白，防止被固定导航栏遮挡 */
section[id] {
  scroll-margin-top: calc(var(--header-height) + 12px);
}

/* 字体分类 */
.font-serif {
  font-family: var(--font-serif);
}

.font-sans {
  font-family: var(--font-sans);
}

/* 纹理背景与留白诗意 */
.bg-ivory { background-color: var(--color-ivory); }
.bg-paper { background-color: var(--color-paper); }
.bg-night { background-color: var(--color-night); }
.bg-night-card { background-color: var(--color-night-card); }
.text-ink { color: var(--color-ink); }
.text-champagne { color: var(--color-champagne); }
.text-champagne-light { color: var(--color-champagne-light); }
.text-night { color: var(--color-night); }
.text-pine { color: var(--color-pine); }
.text-muted { color: var(--color-muted); }
.border-champagne { border-color: var(--color-champagne); }

/* 精致香槟金细线条 */
.gold-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(184, 155, 102, 0.4) 30%, rgba(184, 155, 102, 0.8) 50%, rgba(184, 155, 102, 0.4) 70%, transparent 100%);
}

.gold-border-glow {
  border: 1px solid rgba(184, 155, 102, 0.3);
  box-shadow: 0 0 15px rgba(184, 155, 102, 0.08);
  transition: var(--transition-smooth);
}
.gold-border-glow:hover {
  border-color: rgba(184, 155, 102, 0.8);
  box-shadow: 0 0 25px rgba(184, 155, 102, 0.2);
}

/* 共用导航栏状态切换 */
.global-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 50;
  transition: background-color 0.4s ease, border-color 0.4s ease, color 0.4s ease, backdrop-filter 0.4s ease;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

/* 导航主题：浅底墨字 */
.header-theme-light {
  background-color: rgba(244, 240, 232, 0.88);
  border-bottom: 1px solid rgba(29, 28, 26, 0.06);
  color: var(--color-ink);
}
.header-theme-light .nav-link-sub {
  color: #7E7C77;
}
.header-theme-light .nav-link:hover .nav-link-en,
.header-theme-light .nav-link.active .nav-link-en {
  color: var(--color-champagne);
}
.header-theme-light .nav-link:hover .nav-link-sub,
.header-theme-light .nav-link.active .nav-link-sub {
  color: var(--color-ink);
}

/* 导航主题：深底浅字（第2屏与第5屏） */
.header-theme-dark {
  background-color: rgba(18, 27, 42, 0.88);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: #FCFAF5;
}
.header-theme-dark .nav-link-sub {
  color: #A3B1C6;
}
.header-theme-dark .nav-link:hover .nav-link-en,
.header-theme-dark .nav-link.active .nav-link-en {
  color: var(--color-champagne-light);
}
.header-theme-dark .nav-link:hover .nav-link-sub,
.header-theme-dark .nav-link.active .nav-link-sub {
  color: #FCFAF5;
}

/* 导航链接双行竖向排布规范 */
.nav-link {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1.15;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
  padding: 4px 8px;
}
.nav-link-en {
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  transition: var(--transition-fast);
}
.nav-link-sub {
  font-size: 11px;
  letter-spacing: 0.08em;
  transition: var(--transition-fast);
  margin-top: 2px;
}

/* 星核呼吸与微动效 */
@keyframes starPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.85;
    filter: drop-shadow(0 0 8px rgba(184, 155, 102, 0.4));
  }
  50% {
    transform: scale(1.08);
    opacity: 1;
    filter: drop-shadow(0 0 16px rgba(184, 155, 102, 0.8));
  }
}

.star-core-anim {
  animation: starPulse 3.6s ease-in-out infinite;
}

/* 缓慢星轨转动 */
@keyframes orbitRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.orbit-slow {
  animation: orbitRotate 60s linear infinite;
}

/* 尊重减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .star-core-anim,
  .orbit-slow {
    animation: none !important;
  }
  * {
    transition-duration: 0.01ms !important;
  }
}

/* 自定义优雅滚动条 */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: var(--color-ivory);
}
::-webkit-scrollbar-thumb {
  background: rgba(184, 155, 102, 0.4);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(184, 155, 102, 0.8);
}