/* =========================================================
   GRAINE 官网 - 明亮暖色主题
   ========================================================= */

/* --- CSS 变量 --- */
:root {
  /* 主色调 - 温暖金棕色 */
  --gold-1: #C4956A;
  --gold-2: #B8854A;
  --gold-3: #A67540;
  --gold-light: #E8D4C0;
  --gold-glow: rgba(196, 149, 106, 0.25);

  /* 辅助色 - 柔和蓝紫 */
  --accent-1: #7B8FC4;
  --accent-2: #5D6FA8;
  --accent-glow: rgba(123, 143, 196, 0.2);

  /* 强调色 - 青绿 */
  --teal-1: #6AADBF;
  --teal-2: #4A8D9F;

  /* 背景色 - 温暖米白 */
  --bg-0: #FAF8F5;
  --bg-1: #F5F0EB;
  --bg-2: #EDE8E3;
  --bg-3: #E5E0DB;
  --bg-4: #DDD8D3;

  /* 卡片 */
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(180, 160, 140, 0.2);
  --card-border-hover: rgba(196, 149, 106, 0.5);

  /* 玻璃效果 */
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(180, 160, 140, 0.15);

  /* 文字 */
  --text-primary: #2D2A26;
  --text-secondary: #5A5550;
  --text-tertiary: #8A857F;
  --text-muted: #B5B0AA;

  /* 渐变色 */
  --gradient-gold: linear-gradient(135deg, #D4A574 0%, #C4956A 50%, #B8854A 100%);
  --gradient-accent: linear-gradient(135deg, #7B8FC4 0%, #6AADBF 100%);
  --gradient-hero: linear-gradient(180deg, #FAF8F5 0%, #F5F0EB 50%, #EDE8E3 100%);
  --gradient-text: linear-gradient(135deg, #B8854A 0%, #A67540 40%, #7B8FC4 100%);
  --gradient-btn: linear-gradient(135deg, #C4956A 0%, #B8854A 50%, #7B8FC4 100%);

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(45, 42, 38, 0.06);
  --shadow-md: 0 8px 24px rgba(45, 42, 38, 0.08);
  --shadow-lg: 0 20px 60px rgba(45, 42, 38, 0.12);
  --shadow-glow: 0 0 40px rgba(196, 149, 106, 0.15);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* 排版 */
  --font-sans: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Noto Serif SC', Georgia, serif;
  --font-display: 'Noto Serif SC', Georgia, serif;
}

/* --- 基础样式 --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-0);
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(196, 149, 106, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 100% 20%, rgba(123, 143, 196, 0.05), transparent),
    radial-gradient(ellipse 70% 50% at 0% 80%, rgba(106, 173, 191, 0.05), transparent);
  pointer-events: none;
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-base);
}

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

ul {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* --- 容器 --- */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 1;
}

/* =========================================================
   页面加载动画
   ========================================================= */
.page-loader {
  position: fixed;
  inset: 0;
  background: var(--bg-0);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-inner {
  text-align: center;
  animation: loaderPulse 2s ease-in-out infinite;
}

.loader-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gradient-gold);
  margin: 0 auto 16px;
  box-shadow: 0 0 20px var(--gold-glow);
  animation: loaderBounce 0.8s ease-in-out infinite;
}

.loader-text {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.3em;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}

@keyframes loaderPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes loaderBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* =========================================================
   导航栏
   ========================================================= */
.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 48px;
  background: transparent;
  transition: var(--transition-base);
}

.nav-bar.scrolled {
  background: rgba(250, 248, 245, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--card-border);
  padding: 14px 48px;
  box-shadow: var(--shadow-sm);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.nav-logo i {
  font-size: 18px;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-menu a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  letter-spacing: 0.02em;
}

.nav-menu a:not(.nav-cta):hover {
  color: var(--text-primary);
}

.nav-menu a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-gold);
  transition: var(--transition-base);
}

.nav-menu a:not(.nav-cta):hover::after {
  width: 100%;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--gradient-btn);
  color: white;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition-base);
  box-shadow: 0 4px 16px var(--gold-glow);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(196, 149, 106, 0.35);
}

.nav-cta i {
  transition: transform var(--transition-base);
}

.nav-cta:hover i {
  transform: translateX(3px);
}

.nav-toggle {
  display: none;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 20px;
}

/* =========================================================
   Hero 区域
   ========================================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 32px 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.5;
  animation: floatGlow 15s ease-in-out infinite;
}

.glow-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(196, 149, 106, 0.3) 0%, transparent 70%);
  top: -100px;
  left: -100px;
}

.glow-2 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(123, 143, 196, 0.2) 0%, transparent 70%);
  bottom: -150px;
  right: -100px;
  animation-delay: -5s;
}

.glow-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(106, 173, 191, 0.15) 0%, transparent 70%);
  top: 40%;
  left: 50%;
  animation-delay: -10s;
}

@keyframes floatGlow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(50px, -30px) scale(1.1); }
  50% { transform: translate(-30px, 50px) scale(0.95); }
  75% { transform: translate(30px, 30px) scale(1.05); }
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(180, 160, 140, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(180, 160, 140, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.noise-overlay {
  display: none;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4CAF50;
  box-shadow: 0 0 10px #4CAF50;
  animation: pulseDot 2s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: 28px;
  letter-spacing: -0.03em;
}

.hero-title-line {
  display: block;
  opacity: 0;
  animation: fadeUp 0.9s cubic-bezier(0.3, 0.9, 0.3, 1) forwards;
}

.hero-title-line:first-child {
  color: var(--text-primary);
  animation-delay: 0.1s;
}

.hero-title-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation-delay: 0.25s;
  position: relative;
  display: inline-block;
}

.hero-title-gradient::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 2px;
  background: var(--gradient-gold);
  opacity: 0.5;
  border-radius: 2px;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-desc {
  font-size: clamp(15px, 1.5vw, 18px);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 48px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  opacity: 0;
  animation: fadeUp 0.9s cubic-bezier(0.3, 0.9, 0.3, 1) 0.4s forwards;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 80px;
  opacity: 0;
  animation: fadeUp 0.9s cubic-bezier(0.3, 0.9, 0.3, 1) 0.55s forwards;
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition-base);
  border: none;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.01em;
}

.btn-large {
  padding: 18px 40px;
  font-size: 16px;
}

.btn-primary {
  background: var(--gradient-btn);
  color: white;
  box-shadow: 0 4px 16px var(--gold-glow), inset 0 1px 0 rgba(255,255,255,0.2);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(196, 149, 106, 0.35), inset 0 1px 0 rgba(255,255,255,0.3);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.6s ease;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary i {
  transition: transform var(--transition-base);
}

.btn-primary:hover i {
  transform: translateX(4px);
}

.btn-ghost {
  background: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.9);
  border-color: var(--card-border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.btn-ghost i {
  transition: transform var(--transition-base);
}

.btn-ghost:hover i {
  transform: scale(1.15);
}

/* --- Hero 统计数字 --- */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  opacity: 0;
  animation: fadeUp 0.9s cubic-bezier(0.3, 0.9, 0.3, 1) 0.7s forwards;
}

.stat-item {
  padding: 0 40px;
  text-align: center;
}

.stat-num {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.stat-num.stat-custom::after {
  content: '%';
  font-size: 0.6em;
}

.stat-label {
  font-size: 13px;
  color: var(--text-tertiary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.stat-divider {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, transparent, var(--card-border), transparent);
}

/* --- 滚动提示 --- */
.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  opacity: 0;
  animation: fadeIn 1s ease 1.5s forwards;
}

.hero-scroll-indicator span {
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--text-tertiary);
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--gold-2), transparent);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: '';
  position: absolute;
  top: -40px;
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, var(--gold-1));
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { top: -40px; }
  100% { top: 100%; }
}

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

/* =========================================================
   信任条
   ========================================================= */
.trust-bar {
  padding: 32px 0;
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
  background: var(--bg-1);
  position: relative;
  z-index: 1;
}

.trust-bar .container {
  display: flex;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
  justify-content: center;
}

.trust-label {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--text-tertiary);
  text-transform: uppercase;
  font-weight: 600;
}

.trust-items {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
  justify-content: center;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition-base);
}

.trust-item:hover {
  color: var(--gold-2);
}

.trust-item i {
  font-size: 14px;
  color: var(--gold-1);
}

/* =========================================================
   Section 通用样式
   ========================================================= */
.section {
  padding: 120px 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  margin-bottom: 80px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--gold-2);
  text-transform: uppercase;
  margin-bottom: 24px;
}

.section-eyebrow i {
  font-size: 10px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

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

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* =========================================================
   功能特性 - 授权系统
   ========================================================= */
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}

.feature-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  transition: var(--transition-base);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, transparent, var(--gold-1), transparent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

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

.feature-card-lg {
  grid-column: span 1;
}

.feature-card-inner {
  position: relative;
  z-index: 1;
}

.feature-icon-wrap {
  position: relative;
  width: 64px;
  height: 64px;
  margin-bottom: 24px;
}

.feature-glow {
  position: absolute;
  inset: -10px;
  background: var(--gradient-gold);
  border-radius: 20px;
  filter: blur(20px);
  opacity: 0.15;
  transition: var(--transition-base);
}

.feature-card:hover .feature-glow {
  opacity: 0.25;
}

.feature-icon {
  position: relative;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-gold);
  border-radius: 16px;
  color: white;
  font-size: 26px;
  font-weight: 700;
  box-shadow: 0 4px 16px var(--gold-glow);
}

.feature-num {
  position: absolute;
  top: 0;
  right: 0;
  font-family: var(--font-display);
  font-size: 80px;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1px var(--card-border);
  line-height: 1;
  letter-spacing: -0.05em;
  opacity: 0.5;
  transition: var(--transition-base);
}

.feature-card:hover .feature-num {
  color: rgba(196, 149, 106, 0.08);
  -webkit-text-stroke: 1px var(--gold-1);
}

.feature-title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.feature-list li i {
  font-size: 12px;
  color: white;
  background: #4CAF50;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* =========================================================
   Showcase 左右交替展示
   ========================================================= */
.showcase-section {
  background: var(--bg-1);
  overflow: hidden;
}

.showcase-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 120px;
}

.showcase-row:last-child {
  margin-bottom: 0;
}

.showcase-row.reverse .showcase-content {
  order: 2;
}

.showcase-row.reverse .showcase-visual {
  order: 1;
}

.showcase-content {
  position: relative;
}

.showcase-tag {
  display: inline-block;
  padding: 6px 14px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--gold-2);
  margin-bottom: 24px;
}

.showcase-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.showcase-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 32px;
}

.showcase-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.highlight {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition-base);
}

.highlight:hover {
  background: rgba(196, 149, 106, 0.1);
  border-color: var(--card-border-hover);
  color: var(--gold-2);
}

.highlight i {
  font-size: 14px;
  color: var(--gold-1);
}

/* --- Showcase 视觉卡片 --- */
.showcase-visual {
  position: relative;
  min-height: 400px;
}

.showcase-visual::before {
  content: '';
  position: absolute;
  inset: -40px;
  background: radial-gradient(circle, var(--gold-glow), transparent 60%);
  opacity: 0.4;
  filter: blur(40px);
  z-index: 0;
}

.visual-card {
  position: relative;
  z-index: 1;
  background: white;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--shadow-lg);
}

/* 卡片 1 - 瀑布流 */
.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 20px;
}

.card-dots {
  display: flex;
  gap: 6px;
}

.card-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg-3);
}

.card-dots span:nth-child(1) { background: #E57373; }
.card-dots span:nth-child(2) { background: #FFD54F; }
.card-dots span:nth-child(3) { background: #4FC3F7; }

.card-title {
  font-size: 13px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}

.grid-item {
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.3, 0.9, 0.3, 1);
}

.grid-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 50%, rgba(255,255,255,0.2) 100%);
}

.grid-item:nth-child(1) {
  grid-column: span 2;
  height: 160px;
  background: linear-gradient(135deg, #C4956A, #7B8FC4);
}

.grid-item:nth-child(2) {
  height: 160px;
  background: linear-gradient(135deg, #6AADBF, #4A8D9F);
}

.grid-item:nth-child(3) {
  height: 120px;
  background: linear-gradient(135deg, #E88FA8, #C4956A);
}

.grid-item:nth-child(4) {
  height: 120px;
  background: linear-gradient(135deg, #8BC34A, #6AADBF);
}

.grid-item:nth-child(5) {
  height: 120px;
  background: linear-gradient(135deg, #7B8FC4, #5D6FA8);
}

/* 卡片 2 - 评论 */
.comment-thread {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.comment-item {
  display: flex;
  gap: 12px;
  padding: 16px;
  background: var(--bg-1);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
}

.comment-reply {
  margin-left: 48px;
}

.comment-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.comment-body {
  flex: 1;
  min-width: 0;
}

.comment-name {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gold-2);
  margin-bottom: 4px;
}

.comment-body p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.comment-meta {
  font-size: 11px;
  color: var(--text-tertiary);
}

/* 卡片 3 - 友链 */
.friend-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.link-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--bg-1);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.link-item:hover {
  background: var(--bg-2);
  border-color: var(--card-border-hover);
}

.link-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.link-info {
  flex: 1;
  min-width: 0;
}

.link-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.link-desc {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* =========================================================
   主题定制
   ========================================================= */
.themes {
  background: var(--bg-0);
}

.themes-showcase {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.theme-presets {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 16px;
}

.theme-item {
  position: relative;
  aspect-ratio: 3/4;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 20px 12px;
  transition: var(--transition-base);
  box-shadow: var(--shadow-md);
}

.theme-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(0,0,0,0.4) 100%);
  transition: var(--transition-base);
}

.theme-icon {
  position: relative;
  font-size: 28px;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 12px;
  transition: var(--transition-base);
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.theme-name {
  position: relative;
  font-size: 13px;
  font-weight: 600;
  color: white;
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
  letter-spacing: 0.02em;
}

.theme-item:hover {
  transform: translateY(-8px) scale(1.03);
  box-shadow: var(--shadow-lg);
}

.theme-item:hover .theme-overlay {
  background: linear-gradient(to bottom, transparent 20%, rgba(0,0,0,0.5) 100%);
}

.theme-item:hover .theme-icon {
  transform: scale(1.2);
  margin-bottom: 16px;
}

.theme-details {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.theme-detail-card {
  padding: 32px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  transition: var(--transition-base);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

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

.theme-detail-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-1);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  font-size: 22px;
  color: var(--gold-1);
}

.theme-detail-card h4 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.theme-detail-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

/* 模式切换 */
.theme-mode-toggle {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 4px;
  background: var(--bg-2);
  border-radius: 999px;
}

.theme-mode-toggle span {
  width: 44px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  color: var(--text-tertiary);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition-base);
}

.theme-mode-toggle span.active {
  background: var(--gradient-gold);
  color: white;
  box-shadow: 0 2px 8px var(--gold-glow);
}

.theme-mode-toggle span:hover:not(.active) {
  color: var(--text-secondary);
}

/* 玻璃效果预览 */
.theme-glass-preview {
  position: relative;
  height: 80px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-2), var(--bg-3));
}

.glass-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(20px);
}

.glass-blob.blob-1 {
  width: 80px;
  height: 80px;
  background: var(--gold-1);
  top: -20px;
  left: -10px;
  opacity: 0.4;
}

.glass-blob.blob-2 {
  width: 60px;
  height: 60px;
  background: var(--accent-1);
  bottom: -10px;
  right: 10px;
  opacity: 0.4;
}

.glass-panel {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 8px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.glass-panel span {
  font-size: 11px;
  color: var(--text-primary);
  font-weight: 500;
  letter-spacing: 0.05em;
}

/* 颜色选择 */
.theme-colors {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.theme-colors span {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.theme-colors span:hover {
  transform: scale(1.2);
}

/* =========================================================
   管理后台
   ========================================================= */
.admin {
  background: var(--bg-1);
}

.admin-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.admin-card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.admin-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-gold);
  opacity: 0;
  transition: var(--transition-base);
}

.admin-card:hover {
  transform: translateY(-6px);
  border-color: var(--card-border-hover);
  box-shadow: var(--shadow-lg);
}

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

.admin-card-inner {
  padding: 36px;
}

.admin-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-1);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  margin-bottom: 20px;
  font-size: 22px;
  color: var(--gold-1);
  transition: var(--transition-base);
}

.admin-card:hover .admin-icon {
  background: var(--gradient-gold);
  color: white;
  border-color: transparent;
}

.admin-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.admin-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.admin-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
}

.admin-list li i {
  font-size: 11px;
  color: white;
  background: var(--gold-1);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* =========================================================
   FAQ
   ========================================================= */
.showcase {
  background: var(--bg-0);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.faq-item:hover {
  border-color: var(--card-border-hover);
}

.faq-item.active {
  background: white;
  border-color: var(--card-border-hover);
  box-shadow: var(--shadow-md);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 28px;
  cursor: pointer;
  gap: 20px;
}

.faq-question span {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-question i {
  font-size: 14px;
  color: var(--gold-1);
  transition: var(--transition-base);
  flex-shrink: 0;
}

.faq-item.active .faq-question i {
  transform: rotate(45deg);
  color: var(--gold-2);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 28px;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 28px 24px;
}

.faq-answer p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* =========================================================
   最终 CTA
   ========================================================= */
.final-cta {
  background: var(--bg-1);
  padding: 80px 0 120px;
}

.final-cta-content {
  text-align: center;
  padding: 80px 48px;
  background: white;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.final-cta-content::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 140%;
  height: 200%;
  background: radial-gradient(ellipse at center, var(--gold-glow) 0%, transparent 60%);
  opacity: 0.5;
  pointer-events: none;
}

.final-cta-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--gold-2);
  text-transform: uppercase;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.final-cta-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.final-cta-desc {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}

.final-cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* =========================================================
   页脚
   ========================================================= */
.footer {
  background: var(--bg-2);
  padding: 60px 0 32px;
  border-top: 1px solid var(--card-border);
  position: relative;
  z-index: 1;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 32px;
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.footer-logo i {
  font-size: 18px;
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-logo span {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-tertiary);
  line-height: 1.7;
}

.footer-links-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-column h4 {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.footer-column a {
  display: block;
  font-size: 14px;
  color: var(--text-tertiary);
  padding: 6px 0;
  transition: var(--transition-base);
}

.footer-column a:hover {
  color: var(--gold-2);
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-copyright {
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer-social {
  display: flex;
  gap: 12px;
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border: 1px solid var(--card-border);
  border-radius: 10px;
  color: var(--text-tertiary);
  font-size: 16px;
  transition: var(--transition-base);
}

.social-link:hover {
  background: var(--gradient-gold);
  color: white;
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: 0 4px 12px var(--gold-glow);
}

/* =========================================================
   回到顶部
   ========================================================= */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-btn);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 16px;
  cursor: pointer;
  box-shadow: 0 4px 16px var(--gold-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition-base);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(196, 149, 106, 0.4);
}

/* =========================================================
   滚动动画
   ========================================================= */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.3, 0.9, 0.3, 1), transform 0.8s cubic-bezier(0.3, 0.9, 0.3, 1);
}

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

.animate-on-scroll.visible:nth-child(2) { transition-delay: 0.1s; }
.animate-on-scroll.visible:nth-child(3) { transition-delay: 0.2s; }
.animate-on-scroll.visible:nth-child(4) { transition-delay: 0.3s; }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1199px) {
  .theme-presets {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 991px) {
  .container {
    padding: 0 24px;
  }

  .nav-bar {
    padding: 16px 24px;
  }

  .nav-bar.scrolled {
    padding: 12px 24px;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(250, 248, 245, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--card-border);
    box-shadow: var(--shadow-md);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .section {
    padding: 80px 0;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .showcase-row {
    grid-template-columns: 1fr;
    gap: 48px;
    margin-bottom: 80px;
  }

  .showcase-row.reverse .showcase-content {
    order: 1;
  }

  .showcase-row.reverse .showcase-visual {
    order: 2;
  }

  .admin-grid {
    grid-template-columns: 1fr;
  }

  .theme-details {
    grid-template-columns: 1fr;
  }

  .theme-presets {
    grid-template-columns: repeat(3, 1fr);
  }

  .stat-item {
    padding: 0 20px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .final-cta-content {
    padding: 60px 32px;
  }
}

@media (max-width: 767px) {
  .hero {
    padding: 100px 24px 60px;
  }

  .hero-stats {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 24px;
  }

  .stat-item {
    padding: 0;
    flex: 1;
    min-width: 80px;
  }

  .stat-divider {
    display: none;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    justify-content: center;
  }

  .trust-items {
    gap: 20px;
  }

  .trust-item {
    font-size: 12px;
  }

  .section-header {
    margin-bottom: 56px;
  }

  .theme-presets {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-links-group {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
  }
}

@media (max-width: 479px) {
  .container {
    padding: 0 16px;
  }

  .nav-bar {
    padding: 14px 20px;
  }

  .nav-logo {
    font-size: 18px;
  }

  .feature-card,
  .admin-card-inner {
    padding: 28px 24px;
  }

  .final-cta-content {
    padding: 48px 24px;
  }

  .footer-links-group {
    grid-template-columns: 1fr;
  }
}

/* =========================================================
   选中文字颜色
   ========================================================= */
::selection {
  background: var(--gold-light);
  color: var(--text-primary);
}

/* =========================================================
   自定义滚动条
   ========================================================= */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-1);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(to bottom, var(--gold-1), var(--gold-2));
  border-radius: 10px;
  border: 2px solid var(--bg-1);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(to bottom, var(--gold-2), var(--gold-3));
}

/* Firefox 滚动条 */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--gold-1) var(--bg-1);
}

/* =========================================================
   动画关键帧
   ========================================================= */
@keyframes pulseDot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

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

@keyframes scrollLine {
  0% { top: -40px; }
  100% { top: 100%; }
}

@keyframes floatGlow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(50px, -30px) scale(1.1); }
  50% { transform: translate(-30px, 50px) scale(0.95); }
  75% { transform: translate(30px, 30px) scale(1.05); }
}