@charset "UTF-8";

/* ==========================================================================
   Design System: Changxiang Yunlv (畅享云旅)
   Theme: Contemporary Heritage & Clean Editorial (典雅文博 · 现代人文)
   Strictly adheres to UI-UX-PRO-MAX rules: No generic AI dark-neon tropes,
   solid contrast (>= 4.5:1), refined typography, Lucide/Apple styled icons.
   ========================================================================== */

:root {
  /* 品牌色阶：典雅墨金青 + 珍珠石灰底 */
  --primary-deep: #132E35;       /* 核心主色：深沉文博墨青 */
  --primary: #1A3A4A;            /* 品牌标识深青蓝 (与讲师App/小程序保持一致) */
  --primary-accent: #0F766E;     /* 沉稳松石青 */
  --primary-light: #F0FDF4;      /* 极浅青绿点缀底色 */
  
  --gold-accent: #B45309;        /* 雅致古铜金 */
  --gold-light: #FEF3C7;         /* 暖金背景色 */
  
  /* 中性背景色与表面色 (拒绝泛滥的廉价纯黑霓虹) */
  --bg-page: #F8FAFC;            /* 全局页面底色：极柔和浅灰石色 */
  --bg-surface: #FFFFFF;         /* 卡片与容器：纯白 */
  --bg-subtle: #F1F5F9;          /* 次级区域底色 */
  --border-light: #E2E8F0;       /* 精细边框线 */
  --border-focus: #CBD5E1;       /* 聚焦状态边框 */

  /* 文字系统 (严格符合 WCAG 2.1 AA 4.5:1 对比度) */
  --text-main: #0F172A;          /* 标题与主要文字：曜石黑 slate-900 */
  --text-body: #334155;          /* 正文文字：slate-700 */
  --text-muted: #64748B;         /* 次要/说明文字：slate-500 */
  --text-inverse: #FFFFFF;       /* 深色背景上的反白文字 */

  /* 阴影系统：柔和多层弥散投影 */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 12px 24px -4px rgba(15, 23, 42, 0.08), 0 4px 8px -2px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 20px 30px -6px rgba(15, 23, 42, 0.12), 0 8px 12px -4px rgba(15, 23, 42, 0.06);

  /* 字体家族：苹果系统现代人文无衬线 + 典雅衬线标题 fallback */
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-serif: "Songti SC", "SimSun", "STSong", "Playfair Display", serif;
  
  --container-width: 1160px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-body);
  line-height: 1.65;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   微信内置浏览器下载引导遮罩 (WeChat In-App Browser Guide)
   ========================================================================== */
.wx-browser-mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 99999;
  user-select: none;
  -webkit-user-select: none;
}

.wx-mask-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.78);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.wx-tip-container {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding: 16px 24px;
}

.wx-arrow-wrap {
  margin-right: 12px;
  margin-bottom: 8px;
  animation: wxArrowPulse 1.4s ease-in-out infinite alternate;
}

@keyframes wxArrowPulse {
  0% { transform: translate(0, 0); opacity: 0.85; }
  100% { transform: translate(4px, -6px); opacity: 1; }
}

.wx-tip-card {
  background: #FFFFFF;
  border-radius: 16px;
  padding: 24px 22px;
  width: 100%;
  max-width: 320px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.wx-tip-step-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.wx-step-badge {
  width: 22px;
  height: 22px;
  background-color: var(--primary);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.wx-step-text {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.55;
  margin: 0;
  font-weight: 500;
}

.wx-dots-icon {
  display: inline-block;
  background: #F1F5F9;
  color: var(--primary);
  padding: 1px 6px;
  border-radius: 6px;
  font-weight: 700;
  letter-spacing: 2px;
}

.wx-highlight-tag {
  color: var(--primary-accent);
  font-weight: 700;
  background-color: #F0FDF4;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid #BBF7D0;
}

.wx-tip-close-btn {
  margin-top: 6px;
  width: 100%;
  padding: 10px 0;
  background-color: var(--primary);
  color: #FFFFFF;
  border: none;
  border-radius: 9999px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.wx-tip-close-btn:hover {
  background-color: var(--primary-deep);
}

/* ==========================================================================
   顶部移动端 App 下载提示横幅 (Smart App Banner)
   ========================================================================== */
.mobile-app-banner {
  background: #FFFFFF;
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 110;
}

.mobile-banner-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mobile-banner-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.mobile-banner-close {
  background: none;
  border: none;
  color: #94A3B8;
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  flex-shrink: 0;
  transition: var(--transition-fast);
}

.mobile-banner-close:hover {
  color: var(--text-main);
  background-color: var(--bg-subtle);
}

.mobile-banner-app-icon {
  width: 40px;
  height: 40px;
  background-color: #F8FAFC;
  border: 1px solid var(--border-light);
  border-radius: 9px;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.mobile-banner-app-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.mobile-banner-info {
  min-width: 0;
}

.mobile-banner-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mobile-banner-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mobile-banner-right {
  flex-shrink: 0;
}

.btn-banner-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--primary);
  color: #FFFFFF;
  padding: 7px 16px;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

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

/* 顶部导航栏 (Sticky Header) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition-fast);
}

.navbar {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: 14px;
}

.brand-logo-img {
  height: 50px;
  width: auto;
  object-fit: contain;
}

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

.brand-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: 0.5px;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  font-weight: 500;
}

.nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 32px;
}

.nav-link {
  text-decoration: none;
  color: var(--text-body);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 8px 0;
  position: relative;
  transition: var(--transition-fast);
}

.nav-link:hover {
  color: var(--primary);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--primary);
  transition: width 0.25s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.header-action {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-action .btn-primary-nav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--primary);
  color: #ffffff;
  padding: 9px 20px;
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

.header-action .btn-primary-nav:hover {
  background-color: var(--primary-deep);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.header-action .btn-secondary-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: #ffffff;
  color: var(--primary);
  border: 1px solid var(--border-focus);
  padding: 8px 18px;
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

.header-action .btn-secondary-nav:hover {
  background-color: var(--bg-subtle);
  border-color: var(--primary);
  color: var(--primary-deep);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* ==========================================================================
   Hero 首屏区：杂志排版风格 (Editorial Layout)
   左侧严谨有力的品牌主旨，右侧真实文博意象大图与预约数据指标
   ========================================================================== */
.hero-section {
  padding: 64px 0 72px;
  position: relative;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  border-bottom: 1px solid var(--border-light);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.hero-badge {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: #F0FDF4;
  color: #166534;
  border: 1px solid #BBF7D0;
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.badge-dot {
  width: 7px;
  height: 7px;
  background-color: #22C55E;
  border-radius: 50%;
}

.hero-title {
  font-size: 2.75rem;
  line-height: 1.22;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-title .title-highlight {
  color: var(--primary);
  position: relative;
  display: inline-block;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-body);
  line-height: 1.75;
  margin-bottom: 36px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.btn-main {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  background-color: var(--primary);
  color: #ffffff;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-md);
  transition: var(--transition-fast);
}

.btn-main:hover {
  background-color: var(--primary-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 24px;
  background-color: #FFFFFF;
  color: var(--text-main);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-fast);
}

.btn-outline:hover {
  background-color: var(--bg-subtle);
  border-color: var(--border-focus);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}

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

.stat-number {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.stat-divider {
  width: 1px;
  height: 32px;
  background-color: var(--border-light);
}

/* 右侧文博画卷与展示卡片 */
.hero-visual {
  position: relative;
}

.visual-card-wrap {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  padding: 14px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.visual-image {
  width: 100%;
  height: 380px;
  object-fit: cover;
  object-position: top center;
  border-radius: 12px;
  display: block;
}

.visual-overlay-tag {
  position: absolute;
  bottom: 32px;
  left: -16px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-light);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 12px;
}

.overlay-icon-box {
  width: 38px;
  height: 38px;
  background: #F0FDF4;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-accent);
}

.overlay-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.overlay-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Section 通用排版头
   ========================================================================== */
.section-wrapper {
  padding: 80px 0;
}

.section-alt {
  background-color: #FFFFFF;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary-accent);
  margin-bottom: 10px;
}

.section-main-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}

.section-subtext {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   双端产品体验区 (Products Matrix) - 苹果审核核心重点
   ========================================================================== */
.products-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.product-entry-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
  position: relative;
}

.product-entry-card:hover {
  transform: translateY(-4px);
  border-color: #CBD5E1;
  box-shadow: var(--shadow-hover);
}

.card-top-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.target-badge {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 9999px;
  background-color: #F1F5F9;
  color: #475569;
}

.badge-wechat {
  background-color: #ECFDF5;
  color: #047857;
  border: 1px solid #A7F3D0;
}

.badge-app {
  background-color: #F0F9FF;
  color: #0369A1;
  border: 1px solid #BAE6FD;
}

.card-h3 {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.card-summary {
  font-size: 1.02rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 24px;
}

/* 核心特性胶囊 */
.feature-capsules {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

.capsule-item {
  font-size: 0.88rem;
  background-color: var(--bg-page);
  color: var(--text-body);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  font-weight: 500;
}

/* 二维码交互面板 */
.qr-interaction-panel {
  background-color: var(--bg-page);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  gap: 26px;
  margin-top: auto;
}

.qr-code-img {
  width: 175px;
  height: 175px;
  flex-shrink: 0;
  border-radius: 12px;
  background-color: #FFFFFF;
  padding: 8px;
  box-sizing: border-box;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
}

.qr-instruction-wrap {
  display: flex;
  flex-direction: column;
}

.qr-tip-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.qr-tip-title svg {
  width: 20px;
  height: 20px;
}

.qr-tip-text {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.6;
  margin-bottom: 14px;
}

.qr-status-tag {
  align-self: flex-start;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--gold-accent);
  background-color: var(--gold-light);
  padding: 4px 10px;
  border-radius: 6px;
}

/* App 下载操作按钮组 (支持移动端直接点击与PC端备选) */
.app-download-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 9999px;
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-fast);
  cursor: pointer;
}

.btn-download-android {
  background-color: var(--primary);
  color: #FFFFFF;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--primary);
}

.btn-download-android:hover {
  background-color: var(--primary-deep);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-download-ios {
  background-color: #FFFFFF;
  color: var(--text-main);
  border: 1px solid var(--border-focus);
  box-shadow: var(--shadow-sm);
}

.btn-download-ios:hover {
  background-color: var(--bg-subtle);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

/* ==========================================================================
   平台核心业务流程 (Workflow 4 Steps)
   ========================================================================== */
.workflow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.workflow-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition-fast);
}

.workflow-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.step-number-tag {
  width: 36px;
  height: 36px;
  background-color: #F1F5F9;
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 800;
  margin-bottom: 18px;
}

.step-card-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.step-card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   四大核心优势 (4 Core Advantages)
   ========================================================================== */
.features-container-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-box {
  background-color: var(--bg-page);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-fast);
}

.feature-box:hover {
  background-color: #FFFFFF;
  border-color: #CBD5E1;
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-icon-wrapper {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.feature-heading {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.feature-body {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   企业资质与合规展示 (Corporate & Compliance) - 苹果审核极度看重
   ========================================================================== */
.corporate-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 44px;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 48px;
  box-shadow: var(--shadow-sm);
}

.corp-intro-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
}

.corp-intro-para {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.75;
  margin-bottom: 28px;
}

.audit-facts-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.audit-fact-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
}

.check-icon {
  width: 20px;
  height: 20px;
  color: var(--primary-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.fact-key {
  color: var(--text-muted);
  width: 145px;
  flex-shrink: 0;
  white-space: nowrap;
}

.fact-val {
  color: var(--text-main);
  font-weight: 600;
}

.corp-contact-sidebar {
  background-color: var(--bg-page);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.sidebar-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

.contact-meta-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 0.88rem;
}

.contact-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.meta-value {
  color: var(--text-main);
  font-weight: 600;
  text-decoration: none;
}

/* ==========================================================================
   页脚 (Site Footer)
   ========================================================================== */
.site-footer {
  background-color: #0F172A;
  color: #94A3B8;
  padding: 52px 0 40px;
  border-top: 1px solid #1E293B;
  font-size: 0.95rem;
}

.footer-main-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-corp-summary {
  max-width: 440px;
}

.footer-logo-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-logo-img {
  height: 32px;
  filter: brightness(0) invert(1);
}

.footer-company-name {
  color: #F8FAFC;
  font-weight: 700;
  font-size: 1.1rem;
}

.footer-tagline {
  color: #94A3B8;
  font-size: 0.92rem;
  line-height: 1.7;
}

.footer-nav-col h5 {
  color: #F8FAFC;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links-list a {
  color: #94A3B8;
  font-size: 0.92rem;
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-links-list a:hover {
  color: #F8FAFC;
}

.footer-bottom-bar {
  padding-top: 28px;
  border-top: 1px solid #1E293B;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  color: #94A3B8;
  font-size: 0.92rem;
  font-weight: 500;
}

/* ==========================================================================
   响应式断点适配 (Responsive Breakpoints: 992px, 768px, 480px)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-visual {
    max-width: 540px;
    margin: 0 auto;
  }
  .visual-image {
    height: 280px;
  }
  .features-container-grid,
  .workflow-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .corporate-card {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  .section-wrapper {
    padding: 48px 0;
  }
  .section-head {
    margin-bottom: 28px;
  }
  .section-eyebrow {
    font-size: 0.72rem;
    margin-bottom: 6px;
  }
  .section-main-title {
    font-size: 1.6rem;
    margin-bottom: 10px;
  }
  .section-subtext {
    font-size: 0.88rem;
    line-height: 1.55;
  }
  .nav-menu,
  .header-action {
    display: none;
  }
  .site-header .navbar {
    height: 60px;
  }
  .brand-logo-img {
    height: 36px;
  }
  .brand-name {
    font-size: 1.05rem;
  }
  .brand-subtitle {
    font-size: 0.68rem;
  }
  .hero-section {
    padding: 28px 0 36px;
  }
  .hero-badge {
    font-size: 0.76rem;
    padding: 5px 12px;
    margin-bottom: 16px;
  }
  .hero-title {
    font-size: 1.85rem;
    margin-bottom: 14px;
  }
  .hero-desc {
    font-size: 0.92rem;
    line-height: 1.6;
    margin-bottom: 24px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-bottom: 28px;
  }
  .btn-main, .btn-outline {
    width: 100%;
    padding: 11px 20px;
    font-size: 0.9rem;
  }
  .hero-stats {
    justify-content: space-between;
    gap: 12px;
    padding-top: 18px;
  }
  .stat-number {
    font-size: 1.25rem;
  }
  .stat-label {
    font-size: 0.75rem;
  }
  .visual-card-wrap {
    padding: 10px;
  }
  .visual-image {
    height: 220px;
  }
  .visual-overlay-tag {
    bottom: 18px;
    left: 12px;
    padding: 8px 12px;
    gap: 8px;
  }
  .overlay-icon-box {
    width: 32px;
    height: 32px;
  }
  .overlay-title {
    font-size: 0.8rem;
  }
  .overlay-desc {
    font-size: 0.7rem;
  }
  .products-cards-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .product-entry-card {
    padding: 18px 15px;
    border-radius: var(--radius-md);
  }
  .card-top-meta {
    margin-bottom: 12px;
  }
  .target-badge {
    font-size: 0.78rem;
    padding: 3px 10px;
  }
  .card-h3 {
    font-size: 1.35rem;
    margin-bottom: 8px;
  }
  .card-summary {
    font-size: 0.88rem;
    line-height: 1.6;
    margin-bottom: 16px;
  }
  .feature-capsules {
    gap: 6px;
    margin-bottom: 18px;
  }
  .capsule-item {
    font-size: 0.78rem;
    padding: 4px 9px;
  }
  .qr-interaction-panel {
    flex-direction: column;
    text-align: center;
    align-items: center;
    padding: 16px 12px;
    gap: 14px;
    border-radius: 12px;
  }
  .qr-code-img {
    width: 148px;
    height: 148px;
    padding: 6px;
  }
  .qr-tip-title {
    font-size: 0.98rem;
    justify-content: center;
    margin-bottom: 6px;
  }
  .qr-tip-text {
    font-size: 0.82rem;
    line-height: 1.5;
    margin-bottom: 10px;
  }
  .qr-status-tag {
    align-self: center;
    font-size: 0.76rem;
    padding: 3px 8px;
  }
  .app-download-actions {
    justify-content: center;
    width: 100%;
    gap: 8px;
  }
  .btn-download {
    flex: 1 1 120px;
    padding: 8px 12px;
    font-size: 0.82rem;
  }
  .workflow-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .workflow-card {
    padding: 18px 16px;
  }
  .step-number-tag {
    width: 30px;
    height: 30px;
    font-size: 0.85rem;
    margin-bottom: 12px;
  }
  .step-card-title {
    font-size: 1rem;
    margin-bottom: 6px;
  }
  .step-card-desc {
    font-size: 0.82rem;
    line-height: 1.55;
  }
  .features-container-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .feature-box {
    padding: 20px 16px;
  }
  .feature-icon-wrapper {
    width: 38px;
    height: 38px;
    margin-bottom: 14px;
  }
  .feature-heading {
    font-size: 1.02rem;
    margin-bottom: 6px;
  }
  .feature-body {
    font-size: 0.82rem;
    line-height: 1.55;
  }
  .corporate-card {
    padding: 20px 16px;
    gap: 24px;
  }
  .corp-intro-title {
    font-size: 1.35rem;
    margin-bottom: 12px;
  }
  .corp-intro-para {
    font-size: 0.86rem;
    line-height: 1.6;
    margin-bottom: 18px;
  }
  .audit-fact-row {
    font-size: 0.82rem;
    gap: 8px;
  }
  .fact-key {
    width: 115px;
  }
  .corp-contact-sidebar {
    padding: 18px 16px;
  }
  .sidebar-title {
    font-size: 0.98rem;
    margin-bottom: 12px;
    padding-bottom: 8px;
  }
  .contact-meta-list {
    gap: 10px;
    font-size: 0.82rem;
  }
  .site-footer {
    padding: 36px 0 28px;
    font-size: 0.85rem;
  }
  .footer-main-row {
    flex-direction: column;
    gap: 24px;
    margin-bottom: 24px;
  }
  .footer-company-name {
    font-size: 1rem;
  }
  .footer-tagline {
    font-size: 0.82rem;
  }
  .footer-links-list a {
    font-size: 0.82rem;
  }
  .footer-bottom-bar {
    flex-direction: column;
    text-align: center;
    gap: 10px;
    padding-top: 18px;
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }
  .product-entry-card {
    padding: 16px 12px;
  }
  .qr-interaction-panel {
    padding: 14px 10px;
  }
  .qr-code-img {
    width: 136px;
    height: 136px;
  }
  .card-h3 {
    font-size: 1.25rem;
  }
  .card-summary {
    font-size: 0.84rem;
  }
}