/* 六爻占断APP官网 - 高端新中式设计系统 */

/* ===== 设计系统变量 ===== */
:root {
  --bg-void: #050505;
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-elevated: #1a1a1a;
  --bg-card: #141414;
  --bg-paper: #f5f0e8;
  --bg-paper-dark: #e8dfd3;

  --gold-100: #faf3e0;
  --gold-200: #f0dca0;
  --gold-300: #e2c170;
  --gold-400: #d4af37;
  --gold-500: #c8a45c;
  --gold-600: #b8942e;
  --gold-700: #9a7d28;
  --gold-800: #7c6520;

  --ink-100: #e0ddd8;
  --ink-200: #b0aaa0;
  --ink-300: #807868;
  --ink-400: #5a5040;
  --ink-500: #3a3428;

  --text-title: #f5f0e8;
  --text-primary: #e8e2d8;
  --text-secondary: #a09888;
  --text-muted: #706858;
  --text-inverse: #0a0a0a;

  --accent-red: #8b2500;
  --accent-red-light: #c43e1c;
  --accent-teal: #2a6b5e;
  --accent-blue: #3a5a8a;

  --gradient-gold: linear-gradient(135deg, #d4af37 0%, #f0dca0 40%, #d4af37 60%, #b8942e 100%);
  --gradient-gold-text: linear-gradient(135deg, #d4af37 0%, #f0dca0 50%, #c8a45c 100%);
  --gradient-gold-subtle: linear-gradient(135deg, rgba(212, 175, 55, 0.15) 0%, rgba(240, 220, 160, 0.05) 100%);
  --gradient-ink: linear-gradient(180deg, #0a0a0a 0%, #1a1a1a 50%, #0a0a0a 100%);
  --gradient-hero: linear-gradient(180deg, #0a0a0a 0%, #111 40%, #0a0a0a 100%);
  --gradient-section: linear-gradient(180deg, transparent 0%, rgba(212, 175, 55, 0.02) 50%, transparent 100%);

  --shadow-gold-sm: 0 0 20px rgba(212, 175, 55, 0.08);
  --shadow-gold-md: 0 0 40px rgba(212, 175, 55, 0.12);
  --shadow-gold-lg: 0 4px 60px rgba(212, 175, 55, 0.15);
  --shadow-ink: 0 4px 30px rgba(0, 0, 0, 0.6);
  --shadow-card: 0 2px 20px rgba(0, 0, 0, 0.4), 0 0 1px rgba(212, 175, 55, 0.1);

  --border-gold: 1px solid rgba(212, 175, 55, 0.2);
  --border-gold-strong: 1px solid rgba(212, 175, 55, 0.4);
  --border-ink: 1px solid rgba(255, 255, 255, 0.06);

  --font-display: 'Ma Shan Zheng', 'STKaiti', cursive;
  --font-serif: 'Noto Serif SC', 'Source Han Serif CN', 'SimSun', serif;
  --font-body: 'Noto Sans SC', 'Source Han Sans CN', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  --spacing-3xl: 6rem;
  --spacing-4xl: 8rem;

  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-glacial: 1.2s cubic-bezier(0.4, 0, 0.2, 1);

  --z-bg: 1;
  --z-content: 10;
  --z-header: 100;
  --z-modal: 1000;
  --z-loading: 9999;
}

/* ===== 全局重置 ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--gold-700) var(--bg-primary);
}

::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--gold-700);
  border-radius: 3px;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: rgba(212, 175, 55, 0.3);
  color: var(--text-title);
}

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

a {
  color: var(--gold-400);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--gold-200);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ===== 纹理叠加层 ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.015'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

/* ===== 加载动画 ===== */
.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg-void);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-loading);
  transition: opacity 1s ease, visibility 1s ease;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-content {
  text-align: center;
}

.ink-circle {
  width: 80px;
  height: 80px;
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-top-color: var(--gold-400);
  border-radius: 50%;
  animation: gold-spin 1.5s cubic-bezier(0.5, 0, 0.5, 1) infinite;
  margin: 0 auto var(--spacing-md);
  position: relative;
}

.ink-circle::after {
  content: '☰';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.4rem;
  color: var(--gold-400);
  opacity: 0.6;
}

.loading-text {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--gold-400);
  letter-spacing: 0.3em;
  opacity: 0.8;
}

@keyframes gold-spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ===== 头部导航 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(5, 5, 5, 0.85);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  z-index: var(--z-header);
  border-bottom: var(--border-gold);
  transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

.header.scrolled {
  background: rgba(5, 5, 5, 0.95);
  box-shadow: 0 2px 40px rgba(0, 0, 0, 0.5);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-lg);
  max-width: 1400px;
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(212, 175, 55, 0.2);
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--gold-400);
  font-weight: normal;
  letter-spacing: 0.15em;
  background: var(--gradient-gold-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  gap: 5px;
}

.hamburger-line {
  width: 22px;
  height: 1.5px;
  background: var(--gold-400);
  transition: var(--transition-fast);
  transform-origin: center;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  align-items: center;
}

.nav-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  transition: color var(--transition-fast);
  position: relative;
  padding: var(--spacing-xs) 0;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 1px;
  background: var(--gradient-gold);
  transition: width var(--transition-normal), left var(--transition-normal);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--gold-400);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
  left: 0;
}

/* ===== 英雄区域 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-void);
}

.hero-background {
  position: absolute;
  inset: 0;
  z-index: var(--z-bg);
}

.ink-wash-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(212, 175, 55, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 20% 80%, rgba(212, 175, 55, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse 50% 50% at 80% 60%, rgba(139, 37, 0, 0.03) 0%, transparent 50%);
}

.hero-mountains {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 45%;
  z-index: 2;
  opacity: 0.15;
}

.hero-mountains svg {
  width: 100%;
  height: 100%;
}

.hero-mist {
  position: absolute;
  bottom: 15%;
  left: -10%;
  width: 120%;
  height: 30%;
  background: linear-gradient(180deg, transparent, rgba(10, 10, 10, 0.8));
  z-index: 3;
  animation: mist-flow 20s ease-in-out infinite alternate;
}

.hero-mist::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 200%;
  height: 100%;
  background:
    radial-gradient(ellipse 30% 60% at 20% 50%, rgba(212, 175, 55, 0.04), transparent),
    radial-gradient(ellipse 25% 50% at 60% 40%, rgba(212, 175, 55, 0.03), transparent),
    radial-gradient(ellipse 35% 70% at 80% 60%, rgba(212, 175, 55, 0.02), transparent);
  animation: mist-drift 30s linear infinite;
}

@keyframes mist-flow {
  0% { transform: translateX(-3%) scaleY(1); }
  100% { transform: translateX(3%) scaleY(1.1); }
}

@keyframes mist-drift {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.hero-content {
  position: relative;
  z-index: var(--z-content);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-4xl) var(--spacing-xl);
}

.hero-text {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--transition-glacial), transform var(--transition-glacial);
}

.hero-text.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.hero-title {
  margin-bottom: var(--spacing-xl);
}

.title-main {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 5.5rem);
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
  background: var(--gradient-gold-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 2px 10px rgba(212, 175, 55, 0.3));
  letter-spacing: 0.08em;
}

.title-sub {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2vw, 1.6rem);
  color: var(--text-secondary);
  font-weight: 300;
  letter-spacing: 0.3em;
  position: relative;
  padding-left: 2.5em;
}

.title-sub::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 1.8em;
  height: 1px;
  background: var(--gradient-gold);
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xxl);
  line-height: 2;
  max-width: 480px;
}

.hero-description br {
  display: block;
  content: '';
  margin-top: 0.5em;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xxl);
  min-width: 200px;
  box-sizing: border-box;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.cta-button.primary {
  background: transparent;
  color: var(--gold-400);
  border: var(--border-gold-strong);
  box-shadow: var(--shadow-gold-sm);
}

.cta-button.primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-gold-subtle);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.cta-button.primary:hover {
  color: var(--gold-100);
  border-color: var(--gold-400);
  box-shadow: var(--shadow-gold-md);
  transform: translateY(-2px);
}

.cta-button.primary:hover::before {
  opacity: 1;
}

.cta-button.secondary {
  background: transparent;
  color: var(--text-secondary);
  border: var(--border-ink);
}

.cta-button.secondary:hover {
  color: var(--gold-400);
  border-color: rgba(212, 175, 55, 0.3);
}

.button-text {
  position: relative;
  z-index: 1;
}

.button-icon {
  font-size: 1.1rem;
  position: relative;
  z-index: 1;
  transition: transform var(--transition-fast);
}

.cta-button:hover .button-icon {
  transform: translateY(3px);
}

/* Hero Visual (Splash Preview) */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transform: translateX(40px);
  transition: opacity var(--transition-glacial) 0.3s, transform var(--transition-glacial) 0.3s;
}

.hero-visual.animate-in {
  opacity: 1;
  transform: translateX(0);
}

.app-splash-preview {
  position: relative;
  width: 300px;
  aspect-ratio: 9/19.5; /* Mobile screen ratio */
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(212, 175, 55, 0.2);
  background: #fdf5e6; /* Base paper color for splash */
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.app-splash-preview:hover {
  transform: translateY(-8px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(212, 175, 55, 0.4), var(--shadow-gold-md);
}

.splash-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.splash-bg {
  z-index: 1;
  object-fit: cover; /* Cover the whole area */
}

.splash-content-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 90%; /* 进一步增加内容区域，给顶部腾出空间 */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding-top: 5%; /* 将距离顶部的留白大幅减少到 5%，使其显著上移 */
  z-index: 5;
}

.splash-logo {
  width: 75%; /* Logo 宽度 */
  height: auto;
  object-fit: contain;
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 1.5s ease 1s, transform 1.5s ease 1s;
  margin-bottom: -5%; /* 稍微减少负边距，因为整体上移了，不需要靠得太紧 */
}

.splash-text {
  width: 50%; /* 对联宽度 */
  height: auto;
  object-fit: contain;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1.5s ease 0.5s, transform 1.5s ease 0.5s;
}

.splash-bottom-gradient {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 15%; /* 降低遮罩高度，避免遮挡文字 */
  background: linear-gradient(to top, rgba(253, 245, 230, 1) 0%, rgba(253, 245, 230, 0) 100%);
  z-index: 4;
  pointer-events: none;
}

.hero-visual.animate-in .splash-logo {
  opacity: 1;
  transform: scale(1);
}

.hero-visual.animate-in .splash-text {
  opacity: 1;
  transform: translateY(0);
}

/* Hover effect for inner elements */
.app-splash-preview:hover .splash-logo {
  transform: scale(1.05);
  transition: transform var(--transition-slow);
}

/* ===== 通用 Section 样式 ===== */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  color: var(--text-title);
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.1em;
  background: var(--gradient-gold-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.title-decoration {
  width: 60px;
  height: 1px;
  background: var(--gradient-gold);
  margin: 0 auto var(--spacing-md);
  position: relative;
}

.title-decoration::before {
  content: '◆';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.5rem;
  color: var(--gold-400);
  background: var(--bg-primary);
  padding: 0 8px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  font-weight: 300;
}

/* ===== 关于我们 ===== */
.about-section {
  padding: var(--spacing-4xl) 0;
  background: var(--bg-primary);
  position: relative;
}

.about-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.2), transparent);
}

.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

.about-description {
  font-size: 1.05rem;
  line-height: 2.2;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  text-align: justify;
  text-indent: 2em;
}

.about-visual {
  display: flex;
  justify-content: center;
}

.culture-elements {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.element-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background: rgba(20, 20, 20, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(212, 175, 55, 0.1);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  cursor: default;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.element-item:hover {
  background: rgba(30, 30, 30, 0.6);
  border-color: rgba(212, 175, 55, 0.4);
  transform: translateX(8px);
  box-shadow: var(--shadow-gold-sm);
}

.element-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  border: var(--border-gold);
  background: rgba(212, 175, 55, 0.05);
}

.element-item span {
  font-family: var(--font-serif);
  color: var(--text-primary);
  letter-spacing: 0.1em;
  font-size: 0.95rem;
}

.ink-brush::before { content: '🖌'; }
.calligraphy::before { content: '📜'; }

.traditional-pattern::before {
  content: '🏮';
}

/* ===== 功能特色 (Bento Grid) ===== */
.features-section {
  padding: var(--spacing-4xl) 0;
  background: var(--bg-secondary);
  position: relative;
}

.features-section::before,
.features-section::after {
  content: '';
  position: absolute;
  left: 10%;
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.15), transparent);
}

.features-section::before { top: 0; }
.features-section::after { bottom: 0; }

.features-bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: minmax(200px, 1fr); /* 确保行高一致且内容能够撑开 */
  gap: var(--spacing-lg);
  margin-top: var(--spacing-3xl);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.bento-card {
  background: rgba(20, 20, 20, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: var(--spacing-xl);
  border: 1px solid rgba(212, 175, 55, 0.15);
  border-radius: var(--radius-lg);
  text-align: left;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.bento-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--gradient-gold);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.bento-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.05) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.bento-card:hover {
  transform: translateY(-4px);
  border-color: rgba(212, 175, 55, 0.3);
  box-shadow: var(--shadow-card), var(--shadow-gold-sm);
  background: rgba(25, 25, 25, 0.7);
}

.bento-card:hover::before, .bento-card:hover::after {
  opacity: 1;
}

/* Bento Grid Layout Assignments */
.feature-divination {
  grid-area: 1 / 1 / 2 / 3; /* 行1，列1-2 */
}

.feature-analysis {
  grid-area: 1 / 3 / 3 / 4; /* 行1-2，列3 */
}

.feature-history {
  grid-area: 1 / 4 / 2 / 5; /* 行1，列4 */
}

.feature-culture {
  grid-area: 2 / 4 / 3 / 5; /* 行2，列4 */
}

.feature-membership {
  grid-area: 2 / 1 / 3 / 3; /* 行2，列1-2 */
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--spacing-lg);
}

.feature-membership .feature-content {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--spacing-lg);
}

.feature-membership .feature-icon {
  margin: 0;
  flex-shrink: 0;
}

.feature-membership .membership-text {
  display: flex;
  flex-direction: column;
}

.feature-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  border: var(--border-gold);
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.05);
  transition: all var(--transition-normal);
}

.bento-card:hover .feature-icon {
  border-color: var(--gold-400);
  box-shadow: var(--shadow-gold-sm);
  background: rgba(212, 175, 55, 0.15);
  transform: scale(1.05);
}

.feature-icon svg {
  width: 32px;
  height: 32px;
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--text-title);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.05em;
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.95rem;
  margin-top: auto;
}

/* ===== 下载区域 ===== */
.download-section {
  padding: var(--spacing-4xl) 0;
  background: var(--bg-primary);
  position: relative;
}

.download-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse 50% 50% at 30% 50%, rgba(212, 175, 55, 0.04), transparent),
    radial-gradient(ellipse 40% 40% at 70% 50%, rgba(212, 175, 55, 0.03), transparent);
  pointer-events: none;
}

.download-section .section-title {
  color: var(--text-title);
}

.download-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
  margin-top: var(--spacing-3xl);
  position: relative;
  z-index: 1;
}

.download-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.download-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-card);
  color: var(--text-primary);
  text-decoration: none;
  border: var(--border-gold);
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
}

.download-btn:hover {
  background: rgba(212, 175, 55, 0.06);
  border-color: rgba(212, 175, 55, 0.5);
  transform: translateX(6px);
  box-shadow: var(--shadow-gold-sm);
  color: var(--text-primary);
}

.store-icon {
  width: 36px;
  height: 36px;
  opacity: 0.8;
  filter: grayscale(0.3);
}

.btn-text {
  display: flex;
  flex-direction: column;
}

.btn-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.btn-title {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

.download-info {
  text-align: center;
}

.app-stats {
  display: flex;
  justify-content: space-around;
  margin-bottom: var(--spacing-xxl);
  padding-bottom: var(--spacing-xl);
  border-bottom: var(--border-gold);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 600;
  background: var(--gradient-gold-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
}

.qr-code-section {
  text-align: center;
}

.qr-code {
  width: 130px;
  height: 130px;
  margin: 0 auto var(--spacing-sm);
  background: var(--bg-paper);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
  border: var(--border-gold);
}

.qr-code img {
  width: 100%;
  height: 100%;
}

.qr-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-void);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
  border-top: var(--border-gold);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-logo {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  opacity: 0.9;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--gold-400);
  letter-spacing: 0.1em;
}

.footer-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--gold-400);
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: var(--border-gold);
  border-radius: 50%;
  color: var(--text-muted);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-link:hover {
  border-color: var(--gold-400);
  color: var(--gold-400);
  box-shadow: var(--shadow-gold-sm);
}

.social-icon {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.footer-bottom {
  border-top: var(--border-gold);
  padding-top: var(--spacing-lg);
  text-align: center;
}

.copyright {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.8;
  letter-spacing: 0.05em;
}

.divider {
  margin: 0 var(--spacing-xs);
  opacity: 0.4;
  color: var(--gold-700);
}

.disclaimer {
  font-style: italic;
  color: var(--text-muted);
  opacity: 0.7;
}

.icp-info {
  font-size: 0.75rem;
  opacity: 0.6;
  color: var(--text-muted);
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden { display: none; }
.visible { display: block; }

/* ===== 无障碍 ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -50px;
  left: 6px;
  background: var(--gold-400);
  color: var(--text-inverse);
  padding: 8px 16px;
  text-decoration: none;
  border-radius: var(--radius-sm);
  z-index: 10000;
  font-size: 0.9rem;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
}

:focus-visible {
  outline: 2px solid var(--gold-400);
  outline-offset: 2px;
}

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

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

@keyframes gold-pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* ===== 通知样式 ===== */
.download-notification,
.social-notification {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-elevated);
  border: var(--border-gold);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-gold-md);
  z-index: var(--z-modal);
  opacity: 0;
  transition: all var(--transition-normal);
}

.download-notification.show,
.social-notification.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.notification-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  white-space: nowrap;
}

.notification-icon {
  font-size: 1.2rem;
}

/* ===== 法律文档页面 ===== */
.legal-page {
  padding-top: 120px;
  padding-bottom: var(--spacing-4xl);
  background: var(--bg-primary);
  min-height: 100vh;
}

.legal-content {
  background: var(--bg-secondary);
  padding: var(--spacing-xxl);
  border: var(--border-gold);
  border-radius: var(--radius-sm);
  max-width: 900px;
  margin: 0 auto;
}

.legal-content h1 {
  text-align: center;
  font-family: var(--font-display);
  color: var(--gold-400);
  margin-bottom: var(--spacing-xxl);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  letter-spacing: 0.1em;
  background: var(--gradient-gold-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.legal-content h2 {
  font-family: var(--font-serif);
  color: var(--gold-400);
  margin-top: var(--spacing-xxl);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: var(--border-gold);
  font-size: 1.4rem;
  letter-spacing: 0.08em;
}

.legal-content h3 {
  color: var(--text-title);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  font-size: 1.1rem;
  font-weight: 600;
}

.legal-content p,
.legal-content li {
  color: var(--text-secondary);
  line-height: 2;
  margin-bottom: var(--spacing-sm);
  text-align: justify;
}

.legal-content ul {
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.legal-content li {
  margin-bottom: var(--spacing-xs);
}

.legal-content strong {
  color: var(--text-title);
  font-weight: 600;
}

.legal-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-md) 0;
  font-size: 0.95rem;
  border: var(--border-gold);
}

.legal-content th,
.legal-content td {
  padding: var(--spacing-sm);
  border: var(--border-gold);
  text-align: left;
  vertical-align: top;
}

.legal-content th {
  background: rgba(212, 175, 55, 0.08);
  color: var(--gold-400);
  font-weight: 600;
  white-space: nowrap;
}

.legal-content tr:nth-child(even) {
  background: rgba(212, 175, 55, 0.02);
}

.legal-content tr:hover {
  background: rgba(212, 175, 55, 0.05);
}

.legal-content a {
  color: var(--gold-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all var(--transition-fast);
}

.legal-content a:hover {
  color: var(--gold-200);
  border-bottom-color: var(--gold-400);
}

/* ===== 通用动画触发 ===== */
.animate-element {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.animate-element.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 减少动画偏好 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .animate-element {
    opacity: 1;
    transform: none;
  }

  .hero-text,
  .hero-visual {
    opacity: 1;
    transform: none;
  }

  .hero-mist,
  .hero-mountains {
    animation: none;
  }
}

/* ===== 深色模式已为默认，无需额外处理 ===== */
/* ===== 高对比度模式 ===== */
@media (prefers-contrast: high) {
  :root {
    --text-title: #ffffff;
    --text-primary: #f0f0f0;
    --text-secondary: #d0d0d0;
    --text-muted: #a0a0a0;
    --gold-400: #ffd700;
    --border-gold: 1px solid rgba(255, 215, 0, 0.5);
    --border-gold-strong: 1px solid rgba(255, 215, 0, 0.8);
  }
}