/* ============================================================
   企业宣传片页面样式表
   ------------------------------------------------------------
   功能：主题动画背景 + 全屏沉浸式场景切换
   视觉：海浪涌动 + 冷链冰晶 + 全球航线
   场景：品牌 / 口号 / 业务 / 数据 / 结尾（共 5 幕）
   配色：深海墨蓝底 + 冰蓝点缀 + 暖金航线 + 纯白主文
   特性：场景过渡、错峰动画、移动端响应、安全区适配
   ============================================================ */

/* ============ CSS 变量定义 ============ */
:root {
  /* 主色调 - 与首页宣传片区域墨绿背景融合 */
  --promo-bg: #0A1F15;            /* 墨黑绿 - 与首页 section-video 背景融合 */
  --promo-bg-2: #0F3D2E;          /* 深墨绿 - 辅助 */
  --promo-ice: #b4dcf0;           /* 冰蓝 - 冷链点缀 */
  --promo-ice-soft: rgba(180, 220, 240, 0.5);
  --promo-gold: #d4a574;          /* 暖金 - 航线/点缀色 */
  --promo-gold-light: #e8c89a;    /* 浅金 - 高亮 */
  --promo-gold-dark: #a87f4f;     /* 深金 - 渐变收尾 */
  --promo-white: #ffffff;         /* 纯白 - 主文字 */
  --promo-white-soft: rgba(255, 255, 255, 0.75);
  --promo-white-mute: rgba(255, 255, 255, 0.5);
  --promo-shadow: rgba(0, 0, 0, 0.45);

  /* 字体 */
  --promo-font-serif: 'Noto Serif SC', 'Songti SC', serif;
  --promo-font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --promo-font-en: 'Cormorant Garamond', 'Times New Roman', serif;

  /* 过渡曲线 */
  --promo-ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --promo-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ============ iframe 嵌入模式 ============ */
/* iframe 嵌入模式：针对 16:9 小窗口，文字用大绝对值确保可读 */
body.embedded {
  font-size: 18px;
}
body.embedded .promo-back,
body.embedded .promo-controls,
body.embedded .promo-dots {
  display: none !important;
}
body.embedded .promo-progress {
  z-index: 50;
  height: 3px;
}
body.embedded .promo-scene {
  padding: 6px 10px;
  padding-top: calc(6px + env(safe-area-inset-top));
  padding-bottom: calc(6px + env(safe-area-inset-bottom));
  padding-left: calc(10px + env(safe-area-inset-left));
  padding-right: calc(10px + env(safe-area-inset-right));
}
body.embedded .scene-title {
  font-size: 1.4rem;
  margin-bottom: 4px;
  padding-bottom: 4px;
}
body.embedded .scene-title::after {
  width: 36px;
}
body.embedded .brand-name {
  font-size: clamp(2.4rem, 10vh, 4.5rem);
}
body.embedded .brand-en {
  font-size: 1rem;
  letter-spacing: 0.35em;
}
body.embedded .brand-fullname {
  font-size: 1.05rem;
}
body.embedded .scene-brand {
  gap: 12px;
}
body.embedded .brand-line {
  margin: 8px auto;
}
body.embedded .promo-scene.active .brand-line {
  width: 160px;
}
/* 嵌入模式：特色场景适配 */
body.embedded .feature-icon {
  width: clamp(72px, 18vh, 108px);
  height: clamp(72px, 18vh, 108px);
}
body.embedded .feature-title {
  font-size: clamp(2.2rem, 9vh, 4rem);
}
body.embedded .feature-desc {
  font-size: clamp(1.15rem, 4vh, 1.5rem);
  max-width: 420px;
  text-align: center;
}
body.embedded .feature-line {
  margin: 8px auto;
}
body.embedded .promo-scene.active .feature-line {
  width: 160px;
}
body.embedded .scene-feature {
  gap: 14px;
  text-align: center;
}
body.embedded .feature-tags {
  gap: 10px;
  margin-top: 8px;
}
body.embedded .ftag {
  padding: 5px 16px;
  font-size: 0.85rem;
}
body.embedded .stats-grid {
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 300px;
  width: 100%;
}
body.embedded .promo-stat-item {
  padding: 10px 6px;
}
body.embedded .promo-stat-num {
  font-size: clamp(2rem, 7vh, 3.2rem);
}
body.embedded .promo-stat-suffix {
  font-size: 1.1rem;
}
body.embedded .promo-stat-label {
  font-size: 0.95rem;
  margin-top: 4px;
}
body.embedded .ending-brand {
  font-size: clamp(2.4rem, 10vh, 4rem);
}
body.embedded .ending-slogan {
  font-size: clamp(1.15rem, 4vh, 1.5rem);
}
body.embedded .ending-line {
  margin: 8px auto;
}
body.embedded .promo-scene.active .ending-line {
  width: 120px;
}

/* ============ 基础重置 ============ */
html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--promo-bg);
  color: var(--promo-white);
  font-family: var(--promo-font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
}

/* ============ 粒子画布 ============ */
#particleCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
  pointer-events: none;
}

/* ============ 舞台容器 ============ */
#promoStage {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  overflow: hidden;
}

/* ============ 通用场景容器 ============ */
.promo-scene {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 32px;
  padding-top: calc(64px + env(safe-area-inset-top));
  padding-bottom: calc(64px + env(safe-area-inset-bottom));
  padding-left: calc(32px + env(safe-area-inset-left));
  padding-right: calc(32px + env(safe-area-inset-right));
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 1s var(--promo-ease),
              visibility 1s var(--promo-ease);
  text-align: center;
  z-index: 2;
}

.promo-scene.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* 场景标题通用样式 */
.scene-title {
  font-family: var(--promo-font-serif);
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  font-weight: 600;
  color: var(--promo-white);
  letter-spacing: 0.15em;
  margin-bottom: 48px;
  position: relative;
  padding-bottom: 16px;
}

.scene-title::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg,
    transparent,
    var(--promo-gold),
    transparent);
}

/* ============ 场景 0：品牌展示 ============ */
.scene-brand {
  gap: 24px;
}

.brand-en {
  font-family: var(--promo-font-en);
  font-size: clamp(0.875rem, 1.5vw, 1.125rem);
  color: var(--promo-ice);
  letter-spacing: 0.5em;
  text-transform: uppercase;
  font-weight: 400;
  opacity: 0;
  transform: translateY(20px);
}

.brand-name {
  font-family: var(--promo-font-serif);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  color: var(--promo-white);
  letter-spacing: 0.15em;
  line-height: 1.2;
  margin: 8px 0;
  text-shadow: 0 4px 32px rgba(180, 220, 240, 0.3),
               0 0 60px rgba(180, 220, 240, 0.1);
  opacity: 0;
  transform: translateY(40px) scale(0.96);
}

.brand-line {
  width: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent,
    var(--promo-ice),
    var(--promo-gold),
    var(--promo-ice),
    transparent);
  margin: 16px auto;
  transition: width 1.2s var(--promo-ease) 0.6s;
}

.promo-scene.active .brand-line {
  width: 240px;
}

.brand-fullname {
  font-family: var(--promo-font-sans);
  font-size: clamp(0.875rem, 1.8vw, 1.25rem);
  color: var(--promo-white-soft);
  letter-spacing: 0.3em;
  font-weight: 300;
  opacity: 0;
  transform: translateY(20px);
}

/* 场景 0 激活动画 */
.promo-scene.active .brand-en {
  animation: promoFadeUp 1s var(--promo-ease-out) 0.2s forwards;
}

.promo-scene.active .brand-name {
  animation: brandFadeIn 1.2s var(--promo-ease-out) 0.4s forwards;
}

.promo-scene.active .brand-fullname {
  animation: promoFadeUp 1s var(--promo-ease-out) 0.9s forwards;
}

/* ============ 场景 1-3：特色场景（冷链/直采/配送） ============ */
.scene-feature {
  gap: 20px;
}

.feature-icon {
  width: clamp(64px, 12vw, 96px);
  height: clamp(64px, 12vw, 96px);
  color: var(--promo-ice);
  opacity: 0;
  transform: scale(0.5) rotate(-15deg);
  transition: color 0.3s;
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

/* 场景2全国直采图标用金色 */
.feature-icon-source {
  color: var(--promo-gold);
}

/* 场景3高效配送图标用金色 */
.feature-icon-delivery {
  color: var(--promo-gold);
}

.feature-title {
  font-family: var(--promo-font-serif);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--promo-white);
  letter-spacing: 0.15em;
  opacity: 0;
  transform: translateY(30px);
}

.feature-line {
  width: 0;
  height: 2px;
  background: linear-gradient(90deg,
    transparent,
    var(--promo-ice),
    var(--promo-gold),
    transparent);
  margin: 8px auto;
  transition: width 1s var(--promo-ease) 0.6s;
}

.promo-scene.active .feature-line {
  width: 180px;
}

.feature-desc {
  font-family: var(--promo-font-sans);
  font-size: clamp(0.9rem, 2vw, 1.25rem);
  color: var(--promo-white-soft);
  letter-spacing: 0.15em;
  font-weight: 300;
  max-width: 500px;
  opacity: 0;
  transform: translateY(20px);
}

.feature-tags {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 8px;
}

.ftag {
  padding: 6px 16px;
  border: 1px solid rgba(180, 220, 240, 0.2);
  border-radius: 20px;
  font-family: var(--promo-font-sans);
  font-size: clamp(0.7rem, 1.2vw, 0.85rem);
  color: var(--promo-ice-soft);
  letter-spacing: 0.1em;
  opacity: 0;
  transform: translateY(15px);
}

/* 场景1-3 激活动画 */
.promo-scene.active .feature-icon {
  animation: featureIconIn 0.8s var(--promo-ease-out) 0.2s forwards;
}

.promo-scene.active .feature-title {
  animation: promoFadeUp 0.8s var(--promo-ease-out) 0.4s forwards;
}

.promo-scene.active .feature-desc {
  animation: promoFadeUp 0.7s var(--promo-ease-out) 0.7s forwards;
}

.promo-scene.active .ftag {
  animation: promoFadeUp 0.6s var(--promo-ease-out) forwards;
}

.promo-scene.active .ftag:nth-child(1) { animation-delay: 0.9s; }
.promo-scene.active .ftag:nth-child(2) { animation-delay: 1.0s; }
.promo-scene.active .ftag:nth-child(3) { animation-delay: 1.1s; }

/* ============ 场景 4：核心数据 ============ */
.scene-stats {
  gap: 16px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  width: 100%;
  max-width: 1100px;
}

.promo-stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  opacity: 0;
  transform: translateY(40px);
}

.promo-stat-num {
  font-family: var(--promo-font-en);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--promo-white);
  line-height: 1;
  display: inline-block;
  text-shadow: 0 0 16px rgba(180, 220, 240, 0.35);
}

.promo-stat-suffix {
  font-family: var(--promo-font-en);
  font-size: clamp(1rem, 2vw, 1.5rem);
  font-weight: 600;
  color: var(--promo-gold);
  margin-left: 4px;
  display: inline-block;
  vertical-align: baseline;
}

.promo-stat-label {
  font-family: var(--promo-font-sans);
  font-size: clamp(0.875rem, 1.4vw, 1rem);
  color: var(--promo-white-soft);
  letter-spacing: 0.2em;
  margin-top: 12px;
  font-weight: 300;
}

/* 场景 4 数据项错峰动画 + 数字辉光 */
.promo-scene.active .promo-stat-item {
  animation: statGlowIn 1s var(--promo-ease-out) forwards;
}

.promo-scene.active .promo-stat-item[data-index="0"] { animation-delay: 0.2s; }
.promo-scene.active .promo-stat-item[data-index="1"] { animation-delay: 0.4s; }
.promo-scene.active .promo-stat-item[data-index="2"] { animation-delay: 0.6s; }
.promo-scene.active .promo-stat-item[data-index="3"] { animation-delay: 0.8s; }

/* ============ 场景 5：结尾 ============ */
.scene-ending {
  gap: 24px;
}

.ending-brand {
  font-family: var(--promo-font-serif);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--promo-white);
  letter-spacing: 0.2em;
  text-shadow: 0 0 24px rgba(180, 220, 240, 0.4),
               0 0 48px rgba(180, 220, 240, 0.15);
  opacity: 0;
  transform: translateY(30px);
}

.ending-slogan {
  font-family: var(--promo-font-sans);
  font-size: clamp(1rem, 2vw, 1.375rem);
  color: var(--promo-ice);
  letter-spacing: 0.3em;
  font-weight: 300;
  opacity: 0;
  transform: translateY(20px);
}

.ending-line {
  width: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent,
    var(--promo-ice),
    var(--promo-gold),
    var(--promo-ice),
    transparent);
  margin: 16px auto;
  transition: width 1.2s var(--promo-ease) 0.8s;
}

.promo-scene.active .ending-line {
  width: 200px;
}

/* 场景 5 结尾淡入动画 */
.promo-scene.active .ending-brand {
  animation: endingFadeIn 1.2s var(--promo-ease-out) 0.3s forwards;
}

.promo-scene.active .ending-slogan {
  animation: promoFadeUp 1s var(--promo-ease-out) 0.7s forwards;
}

/* ============ 顶部进度条 ============ */
.promo-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.08);
  z-index: 100;
  padding-top: env(safe-area-inset-top);
}

.progress-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg,
    var(--promo-ice),
    var(--promo-gold),
    var(--promo-gold-light));
  box-shadow: 0 0 12px rgba(180, 220, 240, 0.5);
  transition: width 0.15s linear;
  border-radius: 0 2px 2px 0;
}

/* ============ 右侧场景指示点 ============ */
.promo-dots {
  position: fixed;
  top: 50%;
  right: 24px;
  right: calc(24px + env(safe-area-inset-right));
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 16px;
  z-index: 100;
}

.promo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: all 0.4s var(--promo-ease);
  position: relative;
}

.promo-dot:hover {
  border-color: var(--promo-gold);
  transform: scale(1.2);
}

.promo-dot.active {
  background: var(--promo-ice);
  border-color: var(--promo-ice);
  box-shadow: 0 0 12px rgba(180, 220, 240, 0.6);
  transform: scale(1.3);
}

/* ============ 底部控制按钮 ============ */
.promo-controls {
  position: fixed;
  bottom: 32px;
  bottom: calc(32px + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 20px;
  z-index: 100;
}

.promo-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(10, 26, 20, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--promo-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all 0.3s var(--promo-ease);
  padding: 0;
}

.promo-btn:hover {
  background: rgba(15, 61, 46, 0.75);
  border-color: var(--promo-gold);
  color: var(--promo-gold);
  transform: translateY(-2px);
}

.promo-btn:active {
  transform: translateY(0);
}

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

.promo-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* ============ 左上角返回按钮 ============ */
.promo-back {
  position: fixed;
  top: 24px;
  top: calc(24px + env(safe-area-inset-top));
  left: 24px;
  left: calc(24px + env(safe-area-inset-left));
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px 10px 14px;
  background: rgba(10, 26, 20, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 24px;
  color: var(--promo-white);
  font-family: var(--promo-font-sans);
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  text-decoration: none;
  cursor: pointer;
  z-index: 100;
  transition: all 0.3s var(--promo-ease);
}

.promo-back:hover {
  background: rgba(15, 61, 46, 0.75);
  border-color: var(--promo-gold);
  color: var(--promo-gold);
}

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

.promo-back svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  flex-shrink: 0;
}

/* ============ 关键帧动画 ============ */

/* 通用上浮淡入 */
@keyframes promoFadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes featureIconIn {
  from {
    opacity: 0;
    transform: scale(0.5) rotate(-15deg);
  }
  to {
    opacity: 1;
    transform: scale(1) rotate(0deg);
  }
}

/* 品牌名淡入 + 轻微缩放 */
@keyframes brandFadeIn {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* 口号缩放淡入 */
@keyframes sloganZoomIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* 业务项滑入 */
@keyframes bizSlideIn {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 数据项带辉光淡入 */
@keyframes statGlowIn {
  0% {
    opacity: 0;
    transform: translateY(40px);
    filter: brightness(1);
  }
  60% {
    filter: brightness(1.6);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
    filter: brightness(1);
  }
}

/* 结尾淡入 */
@keyframes endingFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ 移动端响应式 ============ */
@media (max-width: 768px) {
  .promo-scene {
    padding: 48px 20px;
    padding-top: calc(48px + env(safe-area-inset-top));
    padding-bottom: calc(48px + env(safe-area-inset-bottom));
    padding-left: calc(20px + env(safe-area-inset-left));
    padding-right: calc(20px + env(safe-area-inset-right));
  }

  .scene-title {
    margin-bottom: 32px;
  }

  /* 业务列表：移动端纵向排列 */
  .business-list {
    flex-direction: column;
    gap: 16px;
    max-width: 320px;
  }

  .biz-item {
    flex: 1 1 auto;
    min-width: 0;
    padding: 20px 16px;
  }

  /* 数据网格：移动端 2 列 */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 16px;
  }

  .promo-stat-item {
    padding: 16px 8px;
  }

  /* 控制按钮缩小 */
  .promo-controls {
    bottom: 20px;
    bottom: calc(20px + env(safe-area-inset-bottom));
    gap: 14px;
  }

  .promo-btn {
    width: 42px;
    height: 42px;
    font-size: 16px;
  }

  .promo-btn svg {
    width: 18px;
    height: 18px;
  }

  /* 右侧指示点缩小 */
  .promo-dots {
    right: 14px;
    right: calc(14px + env(safe-area-inset-right));
    gap: 12px;
  }

  .promo-dot {
    width: 8px;
    height: 8px;
  }

  /* 返回按钮缩小 */
  .promo-back {
    top: 16px;
    top: calc(16px + env(safe-area-inset-top));
    left: 16px;
    left: calc(16px + env(safe-area-inset-left));
    padding: 8px 16px 8px 12px;
    font-size: 0.8125rem;
  }

  .promo-back svg {
    width: 16px;
    height: 16px;
  }
}

/* ============ 超小屏适配 ============ */
@media (max-width: 360px) {
  .brand-name {
    letter-spacing: 0.08em;
  }

  .slogan-text {
    letter-spacing: 0.06em;
  }

  .stats-grid {
    gap: 16px 12px;
  }
}

/* ============ 无障碍：尊重用户动效偏好 ============ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .promo-scene {
    transition: opacity 0.3s ease, visibility 0.3s ease;
  }
}