/* ==========================================================================
   钉钉官网 - 最终版 v194 核心视觉样式表
   风格：走马灯旋转 ｜ 骨架：之字折返图文 ｜ 编排：首屏大图留白 -> 再功能 -> 再亮点 -> 再下载矩阵 -> 再底部号召
   底构：底部左文右码，页脚居中备案
   配色：主色朱红 #782633 ｜ 辅色琥珀 #DED0C9 ｜ 点缀碧蓝 #339E57
   背景：走马灯旋转岩层颗粒噪点 ｜ 字体：圆体 + Familjen Grotesk
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Familjen+Grotesk:ital,wght@0,400..700;1,400..700&display=swap');

:root {
  /* 配色规范 */
  --primary-color: #782633;        /* 主色朱红 */
  --primary-hover: #631d27;
  --primary-light: rgba(120, 38, 51, 0.08);
  --secondary-color: #DED0C9;      /* 辅色琥珀 */
  --secondary-hover: #cbbbae;
  --accent-color: #339E57;         /* 点缀碧蓝（青竹碧蓝） */
  --accent-light: rgba(51, 158, 87, 0.12);

  /* 背景与岩层噪点调性 */
  --bg-dark-base: #1B0A0E;         /* 走马灯夜色深岩底 */
  --bg-dark-surface: #261016;
  --bg-dark-card: rgba(45, 18, 24, 0.82);
  --bg-light-base: #FAF6F4;        /* 琥珀浅岩白底 */
  --bg-light-surface: #FFFFFF;
  --bg-light-card: rgba(255, 255, 255, 0.95);

  /* 文字体系 */
  --text-main: #1B0A0E;
  --text-muted: #5C4D50;
  --text-subtle: #8A787B;
  --text-on-dark: #FAF6F4;
  --text-on-dark-muted: #DED0C9;

  /* 边框与微光 */
  --border-light: rgba(120, 38, 51, 0.12);
  --border-amber: rgba(222, 208, 201, 0.45);
  --border-dark: rgba(222, 208, 201, 0.18);
  --glow-zoetrope: 0 0 35px rgba(120, 38, 51, 0.35);

  /* 容器与导航高度 */
  --announcement-height: 62px;
  --header-height: 60px;
  --container-max-width: 1240px;
}

/* 全局重置与基础规范 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "Familjen Grotesk", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "YouYuan", "幼圆", system-ui, -apple-system, sans-serif;
  color: var(--text-main);
  background-color: var(--bg-light-base);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 背景：走马灯旋转岩层颗粒噪点全局叠加 */
.zoetrope-ambient-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: -1;
  background: 
    radial-gradient(circle at 18% 22%, rgba(120, 38, 51, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 82% 78%, rgba(51, 158, 87, 0.07) 0%, transparent 42%),
    radial-gradient(circle at 50% 50%, rgba(222, 208, 201, 0.25) 0%, transparent 60%);
  overflow: hidden;
}

/* 走马灯旋转光影微动层 */
.zoetrope-ambient-bg::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(
    from 0deg,
    rgba(120, 38, 51, 0.04) 0deg 30deg,
    transparent 30deg 90deg,
    rgba(222, 208, 201, 0.06) 90deg 120deg,
    transparent 120deg 180deg,
    rgba(51, 158, 87, 0.04) 180deg 210deg,
    transparent 210deg 270deg,
    rgba(120, 38, 51, 0.04) 270deg 300deg,
    transparent 300deg 360deg
  );
  animation: zoetrope-spin 50s linear infinite;
}

/* 岩层颗粒噪点模拟 */
.zoetrope-ambient-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(45, 18, 24, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.75;
}

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

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   1. 公告条 + 顶栏
   浅薄荷公告条高约 62px，右侧是黑色胶囊「立即查看」
   顶栏高 60px：左标志+六项导航，右边电话+「下载钉钉」+描边「管理后台」+实心「注册钉钉」
   大约 840px 宽时，中间导航收成汉堡菜单，右侧三个动作还在
   ========================================================================== */
.announcement-bar {
  height: var(--announcement-height);
  background-color: #E2F2E9; /* 浅薄荷 */
  border-bottom: 1px solid rgba(51, 158, 87, 0.18);
  display: flex;
  align-items: center;
  position: relative;
  z-index: 100;
}

.announcement-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
}

.announcement-info {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow: hidden;
}

.announcement-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  background-color: var(--primary-color);
  color: #FFFFFF;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.announcement-text {
  font-size: 13.5px;
  color: #194326;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.announcement-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 18px;
  background-color: #111111; /* 黑色胶囊 */
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  text-decoration: none;
  transition: all 0.25s ease;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.announcement-btn:hover {
  background-color: var(--primary-color);
  transform: translateY(-1px);
}

/* 顶栏高 60px */
.header-nav {
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 99;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 20px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand-link-zoetrope {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-icon-zoetrope-frame {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary-color), #4A161E);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(120, 38, 51, 0.25);
  overflow: hidden;
}

.brand-logo-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.brand-text-group {
  display: flex;
  flex-direction: column;
}

.brand-title-main {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: -0.3px;
  line-height: 1.15;
}

.brand-title-tag {
  font-size: 10.5px;
  font-weight: 500;
  color: var(--accent-color);
  letter-spacing: 0.5px;
}

/* 六项导航 */
.main-navigation-menu {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link-item {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  position: relative;
  padding: 6px 2px;
  transition: color 0.2s ease;
}

.nav-link-item:hover,
.nav-link-item.active {
  color: var(--primary-color);
  font-weight: 600;
}

.nav-link-item.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

/* 右侧动作群：电话、「下载钉钉」、描边「管理后台」、实心「注册钉钉」 */
.header-right-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-phone-box {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 8px;
  transition: color 0.2s;
}

.header-phone-box:hover {
  color: var(--primary-color);
}

.btn-header-download {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--primary-color);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  transition: background-color 0.2s;
}

.btn-header-download:hover {
  background-color: var(--primary-light);
}

.btn-header-outline-manage {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--primary-color);
  text-decoration: none;
  padding: 6px 14px;
  border: 1.5px solid var(--primary-color);
  border-radius: 6px;
  transition: all 0.25s ease;
}

.btn-header-outline-manage:hover {
  background-color: var(--primary-color);
  color: #FFFFFF;
}

.btn-header-solid-reg {
  font-size: 13.5px;
  font-weight: 600;
  color: #FFFFFF;
  background-color: var(--primary-color);
  text-decoration: none;
  padding: 7px 16px;
  border-radius: 6px;
  transition: all 0.25s ease;
  box-shadow: 0 4px 12px rgba(120, 38, 51, 0.2);
}

.btn-header-solid-reg:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 6px;
}

/* ==========================================================================
   2. 首屏主张 (Hero Statement) + 首屏大图留白
   居中两行 80px / 字重 600 / 行高 80px。
   气泡词在「会议、记录、协作、工作」之间切换，旁边有手绘下划线。
   辅文是 2700 万组织、7 亿用户、等保三级。
   主按钮实心「下载钉钉」，次按钮描边「下载千问办公」。
   ========================================================================== */
.hero-statement-section {
  padding: 85px 0 60px;
  text-align: center;
  position: relative;
}

.hero-statement-title {
  font-size: 80px;
  font-weight: 600;
  line-height: 80px;
  color: var(--text-main);
  letter-spacing: -2px;
  margin-bottom: 24px;
}

.rotating-bubble-slot {
  display: inline-block;
  position: relative;
  color: var(--primary-color);
  padding: 0 4px;
}

.rotating-bubble-word {
  display: inline-block;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.zoetrope-underline-svg {
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 100%;
  height: 18px;
  color: var(--accent-color);
  pointer-events: none;
}

/* 辅文：2700 万组织、7 亿用户、等保三级 */
.hero-supporting-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 18px;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 38px;
  flex-wrap: wrap;
}

.meta-slice-dot {
  width: 5px;
  height: 5px;
  background-color: var(--accent-color);
  border-radius: 50%;
}

/* 主按钮与次按钮 */
.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 60px;
}

.btn-hero-solid {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  background-color: var(--primary-color);
  color: #FFFFFF;
  font-size: 16.5px;
  font-weight: 600;
  border-radius: 999px;
  text-decoration: none;
  transition: all 0.25s ease;
  box-shadow: 0 8px 24px rgba(120, 38, 51, 0.28);
}

.btn-hero-solid:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(120, 38, 51, 0.35);
}

.btn-hero-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 15px 34px;
  background-color: transparent;
  color: var(--primary-color);
  font-size: 16.5px;
  font-weight: 600;
  border: 2px solid var(--primary-color);
  border-radius: 999px;
  text-decoration: none;
  transition: all 0.25s ease;
}

.btn-hero-outline:hover {
  background-color: var(--primary-color);
  color: #FFFFFF;
  transform: translateY(-2px);
}

/* 首屏大图留白展现区 (大比例通透留白展台) */
.hero-white-space-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 20px 20px;
  position: relative;
}

.hero-big-img-box {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(45, 18, 24, 0.12), 0 0 0 1px var(--border-light);
  background: #FFFFFF;
}

.hero-big-img-box img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.hero-float-zoetrope-card {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(222, 208, 201, 0.7);
  border-radius: 14px;
  padding: 20px 26px;
  text-align: left;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

.hero-float-zoetrope-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 6px;
}

.hero-float-zoetrope-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}

/* ==========================================================================
   3. 骨架：之字折返图文 (Zigzag Alternate Layout)
   围绕核心能力：数据导出、报表生成、统计分析
   左图右文 -> 右图左文 -> 左图右文 交替折返
   ========================================================================== */
.zigzag-feature-section {
  padding: 80px 0;
  background: linear-gradient(180deg, var(--bg-light-base) 0%, #FFFFFF 100%);
  position: relative;
}

.section-zoetrope-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 60px;
}

.zoetrope-tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  background-color: rgba(120, 38, 51, 0.09);
  color: var(--primary-color);
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  margin-bottom: 14px;
}

.section-zoetrope-title {
  font-size: 40px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -1px;
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-zoetrope-desc {
  font-size: 16.5px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 之字折返项容器 */
.zigzag-flow-container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.zigzag-row {
  display: flex;
  align-items: center;
  gap: 50px;
  background: var(--bg-light-card);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 10px 30px rgba(120, 38, 51, 0.04);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.zigzag-row:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 40px rgba(120, 38, 51, 0.08);
  border-color: rgba(120, 38, 51, 0.22);
}

/* 之字折返：偶数项左右对调（右图左文） */
.zigzag-row.reverse {
  flex-direction: row-reverse;
}

/* 图文左右各占比例 */
.zigzag-visual-col {
  flex: 1.1;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.07);
  background: #FFFFFF;
}

.zigzag-visual-col img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  display: block;
}

.zigzag-text-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.zigzag-step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--primary-color);
  color: #FFFFFF;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 700;
  box-shadow: 0 4px 10px rgba(120, 38, 51, 0.25);
}

.zigzag-item-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}

.zigzag-item-desc {
  font-size: 15.5px;
  color: var(--text-muted);
  line-height: 1.65;
}

.zigzag-item-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
}

.zigzag-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary-color);
  font-size: 12.5px;
  font-weight: 600;
  border-radius: 6px;
}

/* ==========================================================================
   4. 再亮点：产品证明，连续四段
   段 1：五个文字页签（钉钉 9.0、千问办公、AI 听记、AI 表格、AI 会议）压在演示画面上；
   段 2：灰底横滑卡片，每张是「名称 / 角色 / 一句结果」；
   段 3：白底手风琴「每一项工作，都配一个会干活的 AI」，左目录右画面；
   段 4：硬件沿用同一结构，章标题从 58px 降到 21px，读起来像上一章的续篇。
   ========================================================================== */
.proof-continuum-section {
  padding: 85px 0;
  background-color: #F7F1EE;
  position: relative;
}

/* 段 1：五个文字页签压在演示画面上 */
.proof-tabs-overlay-box {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 36px;
  margin-bottom: 60px;
  box-shadow: 0 14px 40px rgba(45, 18, 24, 0.05);
}

.proof-tabs-header-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 2px solid var(--border-light);
  padding-bottom: 16px;
  margin-bottom: 30px;
  overflow-x: auto;
}

.proof-tab-pill {
  padding: 10px 22px;
  background: transparent;
  border: none;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.proof-tab-pill.active,
.proof-tab-pill:hover {
  background: var(--primary-color);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(120, 38, 51, 0.2);
}

.proof-stage-display-card {
  display: flex;
  align-items: center;
  gap: 40px;
}

.proof-screen-preview {
  flex: 1.2;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(0,0,0,0.06);
}

.proof-screen-preview img {
  width: 100%;
  height: 350px;
  object-fit: cover;
  display: block;
}

.proof-screen-caption {
  flex: 1;
}

.proof-screen-caption h4 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
}

.proof-screen-caption p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
}

/* 段 2：灰底横滑卡片「名称 / 角色 / 一句结果」 */
.proof-carousel-wrapper {
  margin-bottom: 60px;
}

.proof-sub-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 22px;
  text-align: left;
}

.proof-scroll-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.proof-role-card {
  background: #EFE8E5; /* 灰底 */
  border: 1px solid rgba(222, 208, 201, 0.7);
  border-radius: 14px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  transition: transform 0.25s ease;
}

.proof-role-card:hover {
  transform: translateY(-3px);
  background: #FFFFFF;
  box-shadow: 0 10px 25px rgba(0,0,0,0.06);
}

.role-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.role-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
}

.role-badge {
  font-size: 11.5px;
  font-weight: 600;
  background: var(--accent-light);
  color: var(--accent-color);
  padding: 3px 8px;
  border-radius: 4px;
}

.role-result {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.55;
  font-style: italic;
}

.role-tagline {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-color);
}

/* 段 3：白底手风琴「每一项工作，都配一个会干活的 AI」，左目录右画面 */
.proof-accordion-wrapper {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 38px;
  margin-bottom: 60px;
  box-shadow: 0 12px 35px rgba(45, 18, 24, 0.04);
}

.accordion-title-main {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 26px;
}

.accordion-content-split {
  display: flex;
  align-items: center;
  gap: 40px;
}

.accordion-menu-list {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.accordion-item {
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 16px 20px;
  cursor: pointer;
  transition: all 0.25s ease;
  background: var(--bg-light-base);
}

.accordion-item.active {
  background: #FFFFFF;
  border-color: var(--primary-color);
  box-shadow: 0 4px 14px rgba(120, 38, 51, 0.1);
}

.accordion-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
}

.accordion-item.active .accordion-item-header {
  color: var(--primary-color);
}

.accordion-item-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-top: 8px;
  line-height: 1.5;
}

.accordion-visual-frame {
  flex: 1.1;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(0,0,0,0.06);
}

.accordion-visual-frame img {
  width: 100%;
  height: 310px;
  object-fit: cover;
  display: block;
}

/* 段 4：硬件沿用同一结构，章标题从 58px 降到 21px，读起来像上一章的续篇 */
.hardware-continuum-block {
  background: var(--bg-light-card);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 34px;
}

.hardware-chapter-title {
  font-size: 21px; /* 章标题从 58px 降到 21px 续篇感 */
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hardware-chapter-title::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 20px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

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

.hardware-unit-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  transition: transform 0.25s ease;
}

.hardware-unit-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary-color);
}

.hardware-unit-img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 14px;
}

.hardware-unit-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.hardware-unit-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   5. 再下载矩阵 (Download Matrix)
   主张回收（灰底三等分）+ 信任（2×2 案例）+ 转化（价格三栏）+ 生态与学习
   ========================================================================== */
.matrix-download-section {
  padding: 85px 0;
  background: #FFFFFF;
  position: relative;
}

/* 主张回收：灰底三等分：无处不在、开箱即用、安全可信 */
.reclaim-triad-wrapper {
  margin-bottom: 65px;
}

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

.reclaim-pillar-card {
  background: #EFE8E5; /* 灰底三等分 */
  border-radius: 16px;
  padding: 34px 28px;
  border: 1px solid rgba(222, 208, 201, 0.6);
  transition: all 0.25s ease;
}

.reclaim-pillar-card:hover {
  background: #FAF6F4;
  border-color: var(--primary-color);
  transform: translateY(-3px);
}

.pillar-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-color);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  box-shadow: 0 6px 14px rgba(120, 38, 51, 0.25);
}

.pillar-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.pillar-desc {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 信任：案例 2×2，数字先出（2 亿+、70%、90%、600+），再写银泰、森马、华大、美年 */
.trust-credentials-wrapper {
  background: var(--bg-light-base);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 40px;
  margin-bottom: 65px;
}

.trust-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-bottom: 36px;
}

.trust-metric-box {
  background: #FFFFFF;
  border-radius: 14px;
  padding: 26px;
  border: 1px solid var(--border-light);
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.metric-big-num {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary-color);
  line-height: 1;
  letter-spacing: -1px;
  min-width: 120px;
}

.metric-client-info h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.metric-client-info p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.55;
}

/* 服务图标排和安全认证（ISO 27001、等保三级） */
.trust-security-cert-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.cert-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text-main);
  font-weight: 600;
}

.cert-tags-flex {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.cert-pill {
  padding: 6px 14px;
  background: #FFFFFF;
  border: 1px solid var(--border-amber);
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--primary-color);
}

/* 转化与收束：价格三栏（个人/小团队、企业、AI 算粒） */
.pricing-three-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 60px;
}

.pricing-plan-card {
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: 18px;
  padding: 34px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-plan-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 35px rgba(120, 38, 51, 0.08);
}

.pricing-plan-card.featured {
  border-color: var(--primary-color);
  box-shadow: 0 16px 40px rgba(120, 38, 51, 0.12);
}

.featured-ribbon {
  position: absolute;
  top: -12px;
  right: 24px;
  background: var(--primary-color);
  color: #FFFFFF;
  font-size: 11.5px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: 0.5px;
}

.pricing-card-header {
  margin-bottom: 22px;
}

.plan-buyer-tier {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.plan-price-num {
  font-size: 34px;
  font-weight: 800;
  color: var(--primary-color);
  line-height: 1.1;
}

.plan-price-num span {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
}

.plan-features-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
}

.plan-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
}

.plan-feature-item svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--accent-color);
}

.btn-plan-action {
  display: block;
  text-align: center;
  padding: 12px;
  border-radius: 8px;
  font-size: 14.5px;
  font-weight: 600;
  text-decoration: none;
  background: var(--primary-light);
  color: var(--primary-color);
  transition: all 0.25s ease;
}

.btn-plan-action:hover,
.pricing-plan-card.featured .btn-plan-action {
  background: var(--primary-color);
  color: #FFFFFF;
}

/* 生态分类页签和学习卡片 */
.ecosystem-learning-block {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.eco-learn-col {
  background: var(--bg-light-base);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  padding: 28px;
}

.eco-learn-col h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.eco-tabs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.eco-tab-pill {
  padding: 6px 14px;
  background: #FFFFFF;
  border: 1px solid var(--border-amber);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
}

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

.learn-card-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-main);
  font-size: 13.5px;
  font-weight: 500;
  transition: border-color 0.2s;
}

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

/* ==========================================================================
   6. 核心底构规范：底部左文右码，页脚居中备案
   页脚先把首屏那句 80px 标题再说一遍，副题改成「让每个企业都有自己的 AI」
   下面再次放注册和下载按钮
   右侧放官方客户端扫码下载二维码（左文右码）
   再展开六列站点地图
   页脚居中备案（资质与版权）
   ========================================================================== */
.footer-zoetrope-wrapper {
  background: var(--bg-dark-base);
  color: var(--text-on-dark);
  padding: 85px 0 40px;
  position: relative;
  overflow: hidden;
}

/* 走马灯暗部背景与岩层颗粒 */
.footer-zoetrope-wrapper::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 80% 20%, rgba(120, 38, 51, 0.25) 0%, transparent 60%),
              radial-gradient(circle at 20% 80%, rgba(51, 158, 87, 0.18) 0%, transparent 60%);
  pointer-events: none;
}

/* 底部左文右码通栏区 (Bottom Left Text, Right QR Code) */
.bottom-left-text-right-qr {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 60px;
  border-bottom: 1px solid rgba(222, 208, 201, 0.16);
  position: relative;
  z-index: 1;
}

.bottom-left-text-col {
  flex: 1.4;
}

/* 首屏那句 80px 标题再说一遍（响应式适配） */
.bottom-restate-title {
  font-size: 56px;
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 16px;
}

/* 副题改成「让每个企业都有自己的 AI」 */
.bottom-restate-sub {
  font-size: 22px;
  color: var(--secondary-color);
  font-weight: 500;
  margin-bottom: 32px;
}

.bottom-cta-buttons {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* 右侧二维码卡片（右码） */
.bottom-right-qr-col {
  flex: 0.8;
  display: flex;
  justify-content: flex-end;
}

.qr-code-lantern-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(222, 208, 201, 0.25);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  max-width: 260px;
  width: 100%;
}

.qr-code-frame {
  width: 160px;
  height: 160px;
  margin: 0 auto 14px;
  background: #FFFFFF;
  border-radius: 10px;
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

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

.qr-code-title {
  font-size: 14.5px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.qr-code-desc {
  font-size: 12px;
  color: var(--secondary-color);
  line-height: 1.4;
}

/* 再展开六列站点地图 */
.sitemap-six-columns-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
  padding: 50px 0;
  border-bottom: 1px solid rgba(222, 208, 201, 0.12);
  position: relative;
  z-index: 1;
}

.sitemap-col h5 {
  font-size: 14.5px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.sitemap-col-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sitemap-col-links a {
  font-size: 13px;
  color: var(--secondary-color);
  text-decoration: none;
  transition: color 0.2s;
  white-space: nowrap;
}

.sitemap-col-links a:hover {
  color: #FFFFFF;
}

/* 页脚居中备案 (Footer Center ICP Info) */
.footer-center-icp-area {
  text-align: center;
  padding-top: 36px;
  position: relative;
  z-index: 1;
}

.footer-center-icp-area p {
  font-size: 12.5px;
  color: rgba(222, 208, 201, 0.7);
  line-height: 1.8;
  margin: 0;
}

.footer-center-icp-area p a {
  color: var(--secondary-color);
  text-decoration: none;
}

.footer-center-icp-area p a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   7. 响应式断点适配规则 (约 840px 宽时导航收拢，移动端自适应)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-statement-title {
    font-size: 60px;
    line-height: 64px;
  }
  .proof-scroll-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-three-columns {
    grid-template-columns: 1fr;
  }
  .sitemap-six-columns-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .bottom-restate-title {
    font-size: 42px;
  }
}

/* 约 840px 宽时，中间导航收成汉堡菜单，右侧三个动作还在 */
@media (max-width: 840px) {
  .main-navigation-menu {
    display: none; /* 中间导航收拢 */
  }
  .mobile-nav-toggle {
    display: block; /* 汉堡菜单按钮显示 */
  }
  .header-phone-box span {
    display: none;
  }
  .header-left {
    gap: 16px;
  }
  .hero-statement-title {
    font-size: 48px;
    line-height: 52px;
  }
  .zigzag-row,
  .zigzag-row.reverse {
    flex-direction: column;
    padding: 24px;
    gap: 24px;
  }
  .zigzag-visual-col img {
    height: 240px;
  }
  .proof-stage-display-card,
  .accordion-content-split {
    flex-direction: column;
  }
  .hardware-grid-inner {
    grid-template-columns: 1fr;
  }
  .reclaim-grid {
    grid-template-columns: 1fr;
  }
  .trust-metrics-grid {
    grid-template-columns: 1fr;
  }
  .ecosystem-learning-block {
    grid-template-columns: 1fr;
  }
  .bottom-left-text-right-qr {
    flex-direction: column;
    align-items: flex-start;
  }
  .bottom-right-qr-col {
    justify-content: flex-start;
  }
  .sitemap-six-columns-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .hero-statement-title {
    font-size: 34px;
    line-height: 40px;
  }
  .hero-supporting-meta {
    font-size: 14px;
    gap: 8px;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .btn-hero-solid,
  .btn-hero-outline {
    width: 100%;
    justify-content: center;
  }
  .header-right-actions {
    gap: 6px;
  }
  .btn-header-download {
    display: none;
  }
  .sitemap-six-columns-grid {
    grid-template-columns: 1fr;
  }
  .bottom-restate-title {
    font-size: 30px;
  }
}