/* ===================================================================
   千问AI官网 · 皮影戏风 核心样式规范
   背景幕布黄 #E8C97A · 主色皮影黑 #2C1810 · 辅色灯光橙 #FF9800 · 点缀缨络红 #B71C1C
   牛皮纸暖黄幕布 · 黑色镂空剪影 · 幕后烛光摇曳 · 关节皮影活动元素
   =================================================================== */

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

:root {
  --color-curtain-yellow: #E8C97A;     /* 背景：牛皮纸暖黄幕布 */
  --color-curtain-warm: #DFBC67;       /* 幕布暗部 */
  --color-curtain-glow: #FCE8AB;       /* 幕布高光透光 */
  --color-puppet-black: #2C1810;       /* 主色：皮影镂空玄黑 */
  --color-puppet-deep: #1A0D08;        /* 深影黑 */
  --color-lamp-orange: #FF9800;        /* 辅色：幕后灯光橙 / 烛光暖橙 */
  --color-lamp-gold: #FFA726;          /* 暖金灯彩 */
  --color-tassel-red: #B71C1C;         /* 点缀：缨络朱红 / 喜庆彩缨 */
  --color-tassel-bright: #D32F2F;      /* 明艳缨红 */
  --color-card-bg: #F0D58C;            /* 皮影台卡片透光底 */
  --color-card-border: rgba(44, 24, 16, 0.45); /* 雕镂阴刻边 */
  
  --font-calligraphy: "Ma Shan Zheng", "Noto Serif SC", cursive, serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  
  --shadow-puppet: 0 8px 24px rgba(44, 24, 16, 0.18), 0 0 16px rgba(255, 152, 0, 0.2);
  --shadow-puppet-hover: 0 16px 36px rgba(44, 24, 16, 0.32), 0 0 30px rgba(255, 152, 0, 0.4);
  --shadow-lamp: 0 0 20px rgba(255, 152, 0, 0.45);
  
  --radius-puppet: 8px 2px 8px 2px;   /* 仿皮影雕刻折角 */
  --transition-puppet: all 0.36s cubic-bezier(0.25, 1, 0.5, 1);
}

/* 全局重置与牛皮纸暖黄幕布质感 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-serif);
  background-color: var(--color-curtain-yellow);
  color: var(--color-puppet-black);
  line-height: 1.85;
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  /* 暖黄幕布透光、烛火微晕与牛皮纸纤维暗纹 */
  background-image: 
    radial-gradient(circle at 50% 15%, rgba(255, 232, 171, 0.6) 0%, transparent 60%),
    radial-gradient(circle at 15% 75%, rgba(255, 152, 0, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 85% 65%, rgba(183, 28, 28, 0.08) 0%, transparent 45%),
    linear-gradient(rgba(232, 201, 122, 0.94), rgba(223, 188, 103, 0.96));
}

/* 幕布烛火摇曳动态光晕层 */
.curtain-flicker-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(
    circle at 50% 30%,
    rgba(255, 167, 38, 0.18) 0%,
    rgba(255, 152, 0, 0.06) 40%,
    transparent 75%
  );
  animation: candleFlicker 6s ease-in-out infinite alternate;
}

@keyframes candleFlicker {
  0% { opacity: 0.7; transform: scale(0.98) translate(0, 0); }
  35% { opacity: 1; transform: scale(1.02) translate(-4px, 2px); }
  70% { opacity: 0.85; transform: scale(0.99) translate(3px, -2px); }
  100% { opacity: 0.95; transform: scale(1.01) translate(0, 0); }
}

/* 皮影铰链关节与操纵竹签装饰 */
.puppet-rod {
  display: inline-block;
  width: 2px;
  height: 14px;
  background: var(--color-puppet-black);
  margin: 0 4px;
  vertical-align: middle;
}

/* 版心容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* 顶部导航 — 镂空戏台雕花边栏与缨络朱红灯影 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(232, 201, 122, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--color-puppet-black);
  box-shadow: 0 4px 20px rgba(44, 24, 16, 0.15);
}

.site-header::after {
  content: "";
  display: block;
  height: 3px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-puppet-black) 0,
    var(--color-puppet-black) 8px,
    var(--color-lamp-orange) 8px,
    var(--color-lamp-orange) 16px,
    var(--color-tassel-red) 16px,
    var(--color-tassel-red) 24px
  );
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--color-puppet-black);
}

.puppet-logo-box {
  position: relative;
  width: 48px;
  height: 48px;
  border-radius: 4px;
  background: var(--color-card-bg);
  border: 2px solid var(--color-puppet-black);
  box-shadow: 0 2px 8px rgba(44, 24, 16, 0.2), inset 0 0 10px rgba(255, 152, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.puppet-logo-box img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.brand-title {
  font-family: var(--font-calligraphy);
  font-size: 1.45rem;
  letter-spacing: 2px;
  color: var(--color-puppet-black);
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-tag {
  font-family: var(--font-serif);
  font-size: 0.75rem;
  padding: 2px 8px;
  background: var(--color-tassel-red);
  color: #FFF;
  border-radius: 2px;
  border: 1px solid var(--color-puppet-black);
  font-weight: 700;
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 6px;
  align-items: center;
}

.nav-links li a {
  text-decoration: none;
  color: var(--color-puppet-black);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 8px 14px;
  border-radius: 3px;
  position: relative;
  letter-spacing: 0.5px;
  transition: var(--transition-puppet);
}

.nav-links li a:hover,
.nav-links li a.active {
  color: var(--color-tassel-red);
  background: rgba(44, 24, 16, 0.08);
  border: 1px dashed var(--color-puppet-black);
}

.nav-links li a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 14px;
  right: 14px;
  height: 3px;
  background: var(--color-tassel-red);
}

/* 皮影剪影小图标 */
.shadow-cut-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--color-puppet-black);
  background: var(--color-lamp-orange);
  color: var(--color-puppet-black);
  font-size: 0.75rem;
  font-weight: 900;
  margin-right: 6px;
  border-radius: 2px;
  line-height: 1;
}

/* 皮影戏台卡片（皮影镂空剪影边脚） */
.puppet-card {
  background: var(--color-card-bg);
  border: 2px solid var(--color-puppet-black);
  border-radius: var(--radius-puppet);
  box-shadow: var(--shadow-puppet);
  position: relative;
  transition: var(--transition-puppet);
  overflow: hidden;
}

/* 铰链铜钉装饰 */
.puppet-card::before,
.puppet-card::after {
  content: "●";
  position: absolute;
  font-size: 8px;
  color: var(--color-tassel-red);
  text-shadow: 0 0 4px var(--color-lamp-orange);
  pointer-events: none;
  transition: var(--transition-puppet);
}

.puppet-card::before {
  top: 4px;
  left: 6px;
}

.puppet-card::after {
  bottom: 4px;
  right: 6px;
}

.puppet-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-puppet-hover);
  border-color: var(--color-tassel-red);
}

.puppet-card:hover::before,
.puppet-card:hover::after {
  color: var(--color-lamp-orange);
  transform: scale(1.4);
}

/* 按钮样式 — 皮影执签按压与幕布透光响应 */
.btn-puppet {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 11px 18px;
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-decoration: none;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.22s ease-out;
  border: 2px solid var(--color-puppet-black);
  position: relative;
  user-select: none;
}

.btn-puppet-primary {
  background: var(--color-tassel-red);
  color: #FFF;
  box-shadow: 0 4px 12px rgba(183, 28, 28, 0.35);
}

.btn-puppet-primary:hover {
  background: var(--color-lamp-orange);
  color: var(--color-puppet-black);
  box-shadow: 0 6px 18px rgba(255, 152, 0, 0.5);
  transform: translateY(-2px);
}

.btn-puppet-primary:active {
  transform: translateY(2px) scale(0.97);
}

.btn-puppet-secondary {
  background: var(--color-card-bg);
  color: var(--color-puppet-black);
}

.btn-puppet-secondary:hover {
  background: var(--color-puppet-black);
  color: var(--color-curtain-glow);
  border-color: var(--color-lamp-orange);
}

/* Hero 首屏与零滚动转化下载区 */
.hero-section {
  padding: 44px 0 36px;
  text-align: center;
  position: relative;
}

.hero-puppet-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 6px 24px;
  background: rgba(44, 24, 16, 0.08);
  border: 1px solid var(--color-puppet-black);
  border-radius: 30px;
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--color-tassel-red);
  margin-bottom: 20px;
  letter-spacing: 2px;
}

.hero-title {
  font-family: var(--font-calligraphy);
  font-size: 2.35rem;
  font-weight: 900;
  color: var(--color-puppet-black);
  line-height: 1.35;
  margin-bottom: 14px;
  letter-spacing: 2px;
  text-shadow: 0 2px 10px rgba(255, 152, 0, 0.4);
}

.hero-subtitle {
  font-family: var(--font-calligraphy);
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--color-tassel-red);
  margin-bottom: 16px;
  letter-spacing: 2.5px;
}

.hero-desc {
  max-width: 840px;
  margin: 0 auto 36px;
  font-size: 1.05rem;
  color: #4A2818;
  line-height: 1.8;
}

/* 并列 4 个下载入口（零滚动转化） */
.download-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 10px;
}

.download-card {
  padding: 24px 20px;
  text-align: center;
}

.download-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 16px;
  border-radius: 4px;
  background: var(--color-curtain-glow);
  border: 2px solid var(--color-puppet-black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--color-puppet-black);
  box-shadow: inset 0 0 10px rgba(255, 152, 0, 0.4);
}

.download-name {
  font-family: var(--font-calligraphy);
  font-size: 1.3rem;
  color: var(--color-puppet-black);
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.download-desc {
  font-size: 0.85rem;
  color: #5D3724;
  line-height: 1.6;
  margin-bottom: 18px;
  min-height: 40px;
}

/* 镂空皮影剪纸分割饰线 */
.puppet-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.divider-line {
  flex: 1;
  max-width: 180px;
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-puppet-black) 0,
    var(--color-puppet-black) 6px,
    transparent 6px,
    transparent 12px
  );
}

.divider-emblem {
  font-family: var(--font-calligraphy);
  font-size: 1.05rem;
  color: var(--color-puppet-black);
  letter-spacing: 2px;
  padding: 4px 16px;
  border: 1px solid var(--color-puppet-black);
  border-radius: 2px;
  background: var(--color-curtain-glow);
  box-shadow: 0 0 12px rgba(255, 152, 0, 0.3);
}

/* 四大功能模块版式统一：
   模块名 + 情绪化短标题 + 场景化功能点
   配皮影幕布镂空画框
*/
.section {
  padding: 76px 0;
  position: relative;
}

.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 64px;
  padding: 48px;
}

.feature-block.reversed {
  direction: rtl;
}

.feature-block.reversed > * {
  direction: ltr;
}

.feature-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.feature-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: var(--color-tassel-red);
  margin-bottom: 12px;
}

.feature-name {
  font-family: var(--font-calligraphy);
  font-size: 2.1rem;
  color: var(--color-puppet-black);
  margin-bottom: 8px;
  letter-spacing: 1.5px;
}

.feature-title {
  font-family: var(--font-calligraphy);
  font-size: 1.35rem;
  color: var(--color-tassel-red);
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 12px;
  letter-spacing: 1.5px;
}

.feature-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 52px;
  height: 3px;
  background: var(--color-lamp-orange);
}

.feature-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-points li {
  position: relative;
  padding-left: 28px;
  font-size: 1rem;
  color: #381E13;
  line-height: 1.75;
}

.feature-points li::before {
  content: "✦";
  position: absolute;
  left: 0;
  top: 1px;
  color: var(--color-lamp-orange);
  font-size: 0.95rem;
}

.feature-points strong {
  color: var(--color-puppet-black);
  font-weight: 800;
}

/* 皮影戏台插图画框展示容器 */
.puppet-frame-box {
  position: relative;
  padding: 16px;
  background: #20110A;
  border-radius: var(--radius-puppet);
  border: 3px solid var(--color-lamp-orange);
  box-shadow: 0 10px 30px rgba(44, 24, 16, 0.4), inset 0 0 16px rgba(255, 152, 0, 0.35);
  display: flex;
  justify-content: center;
  align-items: center;
}

.puppet-frame-box::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 6px;
  right: 6px;
  bottom: 6px;
  border: 1px dashed rgba(255, 152, 0, 0.6);
  pointer-events: none;
}

.puppet-frame-image {
  width: 100%;
  max-width: 440px;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 4px;
  display: block;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  transition: var(--transition-puppet);
}

.feature-block:hover .puppet-frame-image {
  transform: scale(1.02);
}

/* 网页版入口零安装兜底横幅 */
.web-entry-section {
  padding: 24px 0 76px;
}

.web-entry-banner {
  background: linear-gradient(135deg, #24130A 0%, #160B06 100%);
  border: 2px solid var(--color-lamp-orange);
  border-radius: var(--radius-puppet);
  padding: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  box-shadow: var(--shadow-puppet-hover);
  position: relative;
  overflow: hidden;
}

.web-entry-banner::before {
  content: "";
  position: absolute;
  right: -50px;
  bottom: -50px;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(255, 152, 0, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.web-entry-info {
  flex: 1;
}

.web-entry-tag {
  display: inline-block;
  font-size: 0.82rem;
  letter-spacing: 2px;
  color: var(--color-lamp-orange);
  border: 1px solid var(--color-lamp-orange);
  padding: 3px 10px;
  border-radius: 2px;
  margin-bottom: 12px;
  background: rgba(255, 152, 0, 0.1);
}

.web-entry-title {
  font-family: var(--font-calligraphy);
  font-size: 1.95rem;
  color: #FFF;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.web-entry-desc {
  font-size: 1rem;
  color: #E6D0BA;
  line-height: 1.7;
}

.btn-puppet-glow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 34px;
  background: linear-gradient(135deg, var(--color-lamp-gold) 0%, var(--color-lamp-orange) 100%);
  color: var(--color-puppet-deep);
  font-family: var(--font-calligraphy);
  font-size: 1.25rem;
  letter-spacing: 2px;
  text-decoration: none;
  border-radius: 4px;
  border: 1px solid #FFF;
  box-shadow: 0 6px 20px rgba(255, 152, 0, 0.4);
  transition: var(--transition-puppet);
}

.btn-puppet-glow:hover {
  background: #FFF;
  color: var(--color-tassel-red);
  transform: translateY(-3px);
  box-shadow: 0 10px 26px rgba(255, 152, 0, 0.6);
}

/* web.html 网页版在线对话体验专用样式 */
.chat-puppet-frame {
  background: var(--color-card-bg);
  border: 2px solid var(--color-puppet-black);
  border-radius: var(--radius-puppet);
  padding: 36px;
  max-width: 860px;
  margin: 0 auto 50px;
  box-shadow: var(--shadow-puppet);
}

.chat-input-wrapper {
  display: flex;
  gap: 12px;
}

.chat-puppet-input {
  flex: 1;
  padding: 14px 18px;
  font-family: var(--font-serif);
  font-size: 1rem;
  border: 2px solid var(--color-puppet-black);
  border-radius: 4px;
  background: var(--color-curtain-glow);
  color: var(--color-puppet-black);
  outline: none;
  transition: var(--transition-puppet);
}

.chat-puppet-input:focus {
  border-color: var(--color-lamp-orange);
  box-shadow: 0 0 0 3px rgba(255, 152, 0, 0.35);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.step-card {
  padding: 28px 24px;
}

.step-num {
  font-family: var(--font-calligraphy);
  font-size: 1.8rem;
  color: var(--color-tassel-red);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.step-title {
  font-family: var(--font-calligraphy);
  font-size: 1.25rem;
  color: var(--color-puppet-black);
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.step-desc {
  font-size: 0.92rem;
  color: #5D3724;
  line-height: 1.7;
}

/* help.html 帮助中心专用样式 */
.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 920px;
  margin: 0 auto;
}

.faq-card {
  padding: 28px 32px;
}

.faq-question {
  font-family: var(--font-calligraphy);
  font-size: 1.3rem;
  color: var(--color-puppet-black);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: 1px;
}

.faq-answer {
  font-size: 0.98rem;
  color: #4A2818;
  line-height: 1.8;
}

/* 页脚 */
.site-footer {
  background: var(--color-puppet-deep);
  color: #D3B997;
  padding: 48px 0 32px;
  border-top: 3px solid var(--color-lamp-orange);
  margin-top: 40px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
  list-style: none;
  margin-bottom: 24px;
}

.footer-nav a {
  color: #E6D0BA;
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 1px;
  transition: var(--transition-puppet);
}

.footer-nav a:hover {
  color: var(--color-lamp-orange);
}

.footer-copy {
  text-align: center;
  font-size: 0.88rem;
  color: #9C7E60;
  line-height: 1.8;
}

/* 响应式断点 */
@media (max-width: 992px) {
  .download-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .feature-block {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 36px 28px;
  }
  
  .feature-block.reversed {
    direction: ltr;
  }
  
  .web-entry-banner {
    flex-direction: column;
    text-align: center;
    padding: 36px 24px;
  }
  
  .steps-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav-inner {
    flex-direction: column;
    height: auto;
    padding: 14px 0;
    gap: 12px;
  }
  
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
  }
  
  .hero-title {
    font-size: 1.7rem;
  }
  
  .hero-subtitle {
    font-size: 1.25rem;
  }
  
  .download-grid {
    grid-template-columns: 1fr;
  }
  
  .chat-input-wrapper {
    flex-direction: column;
  }
}