/* ============================================================
   天和顺心 品牌官网 — 全站样式表
   朝阳市天和顺心农副食品有限公司
   ------------------------------------------------------------
   规范依据：《需求文档.md》优先
   · 硬性约束：圆角 8-12px；卡片倾斜 ≤10deg + perspective:1000px；
     动效克制，仅 hover / 滚动触发，禁止多余自动播放特效
     （首页 Banner 的实时动态底色、客服侧边栏脉冲发光为需求明确要求，予以保留）
   · 目录：1 变量 / 2 基础 / 3 通用组件 / 4 按钮 / 5 玻璃卡片 /
     6 导航 / 7 首屏 / 8 首页各区块 / 9 页脚 / 10 客服侧边栏 /
     11 入驻页 / 12 表单 / 13 弹窗 / 14 企业介绍页 / 15 动效 /
     16 响应式 / 17 无障碍与降级
   ============================================================ */

/* ============ 1. 变量 ============ */
:root {
  /* 色彩系统 */
  --bg-primary: #0A0E1A;
  --bg-secondary: #0F1424;
  --color-primary: #FF6B2C;              /* 爱马仕橙（品牌锚点色） */
  --color-primary-light: #FF8A55;
  --color-primary-dark: #E55A1B;
  --color-text: #FAF5EF;                 /* 奶白色正文 */
  --color-text-secondary: rgba(250, 245, 239, 0.7);
  --color-text-muted: rgba(250, 245, 239, 0.5);
  --color-glass-bg: rgba(255, 255, 255, 0.06);
  --color-glass-border: rgba(255, 255, 255, 0.12);
  --color-trust: #10B981;                /* 信任绿 */
  --color-danger: #EF4444;

  /* 渐变 */
  --gradient-accent: linear-gradient(135deg, #FF6B2C, #FF3CAC, #784BA0, #2B86C5);
  --gradient-green: linear-gradient(135deg, #10B981, #34D399);
  --gradient-pink: linear-gradient(135deg, #EC4899, #F472B6);
  --gradient-orange: linear-gradient(135deg, #FF6B2C, #FF8A55);

  /* 圆角（硬性约束：8-12px） */
  --radius-card: 12px;
  --radius-button: 10px;
  --radius-input: 8px;
  --radius-tag: 8px;
  --radius-icon: 10px;

  /* 动效 */
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 200ms ease;
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* 间距 */
  --section-padding: 96px 0;
  --container-max: 1200px;
  --container-padding: 0 24px;
  --navbar-height: 72px;

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI',
    'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-size-h1: 48px;
  --font-size-h2: 36px;
  --font-size-h3: 24px;
  --font-size-body: 16px;
  --font-size-small: 14px;
  --line-height: 1.6;
}

/* ============ 2. 基础 ============ */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  /* 固定导航遮挡锚点修复：跳转时预留导航高度 */
  scroll-padding-top: calc(var(--navbar-height) + 16px);
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--color-text);
  line-height: var(--line-height);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.is-menu-open {
  overflow: hidden;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-light);
}

img,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.3;
}

/* 键盘可见焦点（无障碍） */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ============ 3. 通用组件 ============ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--container-padding);
}

.section {
  padding: var(--section-padding);
  position: relative;
}

/* 交替区块底色 */
.section--alt {
  background: var(--bg-secondary);
}

.section-title {
  font-size: var(--font-size-h2);
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: 56px;
}

/* 屏幕阅读器专用文本 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 跳转主内容（键盘无障碍） */
.skip-link {
  position: fixed;
  top: -80px;
  left: 24px;
  z-index: 1300;
  padding: 12px 20px;
  background: var(--color-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-button);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 16px;
  color: #fff;
}

/* 带圆点的信息列表 */
.info-list li {
  position: relative;
  padding: 8px 0 8px 20px;
  color: var(--color-text-secondary);
  font-size: 15px;
}

.info-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 17px;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}

.info-list--trust li::before {
  background: var(--color-trust);
}

/* 卡片内文本工具类（替代内联样式） */
.card-title-lg {
  font-size: var(--font-size-h3);
  font-weight: 700;
  margin: 12px 0;
}

.card-text {
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

.card-tag {
  display: inline-block;
  padding: 5px 12px;
  background: rgba(255, 107, 44, 0.15);
  color: var(--color-primary);
  border-radius: var(--radius-tag);
  font-size: 13px;
  line-height: 1.4;
}

.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background: var(--gradient-accent);
  border-radius: var(--radius-icon);
}

/* ============ 4. 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-button);
  font-family: inherit;
  font-size: var(--font-size-body);
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  border: 1px solid transparent;
  text-align: center;
  transition: background-color var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 107, 44, 0.3);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 107, 44, 0.4);
}

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

.btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-text);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 17px;
}

/* ============ 5. 玻璃卡片 ============ */
.glass-card {
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 32px;
  transition: transform var(--transition-base), box-shadow var(--transition-base),
    border-color var(--transition-base), background-color var(--transition-base);
}

/* 非 3D 卡片：hover 上浮 + 阴影加深 */
.glass-card:not(.tilt-card):hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 40px rgba(255, 107, 44, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

/* 3D 倾斜卡片（倾斜逻辑由 js/main.js 驱动） */
.tilt-card {
  transform-style: preserve-3d;
  will-change: transform;
}

/* 3D 卡片的 hover 阴影加深 */
.tilt-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 40px rgba(255, 107, 44, 0.1);
}

/* ============ 6. 导航 ============ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: background-color var(--transition-base), box-shadow var(--transition-base),
    backdrop-filter var(--transition-base), padding var(--transition-base);
}

/* 滚动后：底部阴影 + 毛玻璃悬浮 */
.navbar.is-scrolled {
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 30px rgba(0, 0, 0, 0.3);
  padding: 12px 0;
}

.navbar-inner {
  display: flex;
  align-items: center;
  gap: 20px;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
}

.navbar-logo:hover {
  color: var(--color-text);
}

.navbar-logo .logo-icon {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  border-radius: var(--radius-icon);
  font-size: 18px;
}

.navbar-logo img {
  height: 36px;
  width: auto;
}

.navbar-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex: 1 1 auto;
}

.navbar-menu a {
  position: relative;
  padding: 4px 0;
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 500;
}

/* hover 下划线高亮 */
.navbar-menu a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: width var(--transition-base);
}

.navbar-menu a:hover,
.navbar-menu a.is-active {
  color: var(--color-text);
}

.navbar-menu a:hover::after,
.navbar-menu a.is-active::after {
  width: 100%;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.navbar-actions .btn {
  padding: 10px 24px;
  font-size: 14px;
}

/* 语言切换按钮 */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-button);
  color: var(--color-text);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color var(--transition-fast), color var(--transition-fast),
    transform var(--transition-fast);
}

.lang-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.lang-toggle .lang-globe {
  font-size: 14px;
  line-height: 1;
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.hamburger[aria-expanded='true'] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger[aria-expanded='true'] span:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded='true'] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端折叠菜单 */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  background: rgba(10, 14, 26, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  visibility: hidden;
  opacity: 0;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-menu.is-open {
  visibility: visible;
  opacity: 1;
}

.mobile-menu > a {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
}

.mobile-menu > a:hover {
  color: var(--color-primary);
}

.mobile-menu .lang-toggle {
  font-size: 15px;
  padding: 12px 22px;
}

/* ============ 7. 首屏 ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 140px 0 100px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* 多层径向渐变 + 实时动态底色（仅首页首屏，需求明确要求；
   内页 .page-hero 只保留静态光晕装饰，不做自动播放，以符合「动效克制」约束） */
.hero .hero-bg::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(255, 107, 44, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(255, 60, 172, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 40% 80%, rgba(120, 74, 160, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 60%, rgba(43, 134, 197, 0.1) 0%, transparent 50%);
  animation: heroFloat 8s ease-in-out infinite;
}

.hero .hero-bg::after {
  content: '';
  position: absolute;
  top: -30%;
  right: -30%;
  width: 160%;
  height: 160%;
  background:
    radial-gradient(ellipse at 60% 40%, rgba(255, 107, 44, 0.08) 0%, transparent 40%),
    radial-gradient(ellipse at 30% 70%, rgba(43, 134, 197, 0.08) 0%, transparent 40%);
  animation: heroFloat2 6s ease-in-out infinite reverse;
}

/* 鼠标视差元素：外层由 JS 写入 transform，内层负责浮动动画，
   避免动画与内联 transform 互相覆盖（原实现的视差失效问题在此修复） */
.hero-parallax-element {
  position: absolute;
  pointer-events: none;
  transition: transform 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-blob {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.4;
}

.hero-parallax-element--1 {
  width: 300px;
  height: 300px;
  top: 20%;
  left: 10%;
}

.hero-parallax-element--1 .hero-blob {
  background: rgba(255, 107, 44, 0.2);
  animation: blobFloat1 7s ease-in-out infinite;
}

.hero-parallax-element--2 {
  width: 200px;
  height: 200px;
  top: 60%;
  right: 15%;
}

.hero-parallax-element--2 .hero-blob {
  background: rgba(255, 60, 172, 0.15);
  animation: blobFloat2 5s ease-in-out infinite;
}

.hero-parallax-element--3 {
  width: 250px;
  height: 250px;
  bottom: 20%;
  left: 30%;
}

.hero-parallax-element--3 .hero-blob {
  background: rgba(43, 134, 197, 0.15);
  animation: blobFloat3 6s ease-in-out infinite;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}

.hero-title {
  font-size: var(--font-size-h1);
  font-weight: 800;
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeInUp 800ms cubic-bezier(0.4, 0, 0.2, 1) 200ms forwards;
}

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

.hero-subtitle {
  font-size: 18px;
  color: var(--color-text-secondary);
  margin-bottom: 40px;
  opacity: 0;
  animation: fadeInUp 800ms cubic-bezier(0.4, 0, 0.2, 1) 400ms forwards;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  opacity: 0;
  animation: fadeInUp 800ms cubic-bezier(0.4, 0, 0.2, 1) 600ms forwards;
}

/* 内页主视觉（仅静态光晕装饰，不做自动播放动画，符合“动效克制”） */
.page-hero {
  position: relative;
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 160px 0 90px;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.page-hero .hero-bg {
  background:
    radial-gradient(ellipse at 30% 40%, rgba(255, 107, 44, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 72% 30%, rgba(120, 74, 160, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 90%, rgba(43, 134, 197, 0.07) 0%, transparent 50%);
}

.page-hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.page-hero-title {
  font-size: var(--font-size-h1);
  font-weight: 800;
  margin-bottom: 16px;
  opacity: 0;
  animation: fadeInUp 800ms cubic-bezier(0.4, 0, 0.2, 1) 200ms forwards;
}

.page-hero-subtitle {
  font-size: 18px;
  color: var(--color-text-secondary);
  opacity: 0;
  animation: fadeInUp 800ms cubic-bezier(0.4, 0, 0.2, 1) 400ms forwards;
}

/* ============ 8. 首页区块 ============ */
/* 8.1 四大核心优势 */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-card {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: 40px 24px;
}

/* 卡片背景光晕装饰 */
.advantage-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(255, 107, 44, 0.05) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

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

.advantage-card .advantage-icon {
  position: relative;
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  background: var(--gradient-accent);
  border-radius: var(--radius-card);
  transition: transform var(--transition-base);
}

.advantage-card:hover .advantage-icon {
  transform: scale(1.1);
}

.advantage-card h3 {
  position: relative;
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.advantage-card p {
  position: relative;
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* 8.2 多端智能下载展示区 */
.download-panel {
  display: flex;
  align-items: center;
  gap: 36px;
  margin-top: 48px;
  padding: 32px 40px;
}

.download-qr {
  flex: 0 0 120px;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  text-align: center;
  font-size: 12px;
  line-height: 1.5;
  color: var(--color-text-muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed var(--color-glass-border);
  border-radius: var(--radius-card);
}

.download-info h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.download-info > p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 18px;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: var(--font-size-small);
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-tag);
  transition: transform var(--transition-fast), border-color var(--transition-fast),
    color var(--transition-fast);
}

.store-badge:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.store-badge.is-soon {
  color: var(--color-text-muted);
  cursor: default;
}

.store-badge.is-soon:hover {
  transform: none;
  border-color: var(--color-glass-border);
  color: var(--color-text-muted);
}

/* 8.3 核心业务场景 */
.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.business-card {
  padding: 0;
  overflow: hidden;
}

.business-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 22px 32px;
  border-radius: var(--radius-card) var(--radius-card) 0 0;
}

.business-card-header--green {
  background: var(--gradient-green);
}

.business-card-header--pink {
  background: var(--gradient-pink);
}

.business-card-header--orange {
  background: var(--gradient-orange);
}

.business-card-header h3 {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.business-card-icon {
  font-size: 22px;
  line-height: 1;
}

.business-card-body {
  padding: 28px 32px;
}

.business-card-body p {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* 8.4 合作模式 */
.cooperation-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.cooperation-card {
  display: flex;
  flex-direction: column;
  padding: 40px;
}

.cooperation-card h3 {
  font-size: var(--font-size-h3);
  font-weight: 700;
  margin-bottom: 12px;
}

.cooperation-card > .card-tag {
  align-self: flex-start;
  margin-bottom: 16px;
}

.cooperation-card > p {
  flex-grow: 1;
  margin-bottom: 24px;
  color: var(--color-text-secondary);
}

.cooperation-card .info-list {
  margin-bottom: 28px;
}

.cooperation-card .btn {
  align-self: flex-start;
}

/* 8.5 底部 CTA 转化区 */
.cta-section {
  padding: 80px 0;
}

.cta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.cta-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 48px 40px;
  text-align: center;
}

.cta-card h3 {
  font-size: var(--font-size-h3);
  font-weight: 700;
}

.cta-card p {
  color: var(--color-text-secondary);
}

/* ============ 9. 页脚 ============ */
.footer {
  padding: 56px 0 32px;
  background: rgba(5, 7, 13, 0.8);
  border-top: 1px solid var(--color-glass-border);
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-info h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 14px;
}

.footer-info p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.footer-links h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 14px;
}

.footer-links a {
  display: block;
  padding: 4px 0;
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
}

/* 链接 hover 下划线 */
.footer-links a:hover {
  color: var(--color-primary);
  text-decoration-color: currentColor;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--color-glass-border);
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

/* 备案号外链：低调样式，hover 才出现下划线与品牌色（合规要求可点击跳转工信部） */
.icp-link {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

.icp-link:hover,
.icp-link:focus-visible {
  color: var(--color-primary);
  text-decoration-color: currentColor;
}

/* ============ 10. 客服侧边栏 ============ */
.cs-sidebar {
  position: fixed;
  right: 0;
  top: 50%;
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transform: translateY(-50%);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

/* 滚动超过 300px 自动展开（由 js/main.js 添加 .is-visible） */
.cs-sidebar.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.cs-sidebar-item {
  position: relative;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-right: none;
  border-radius: var(--radius-card) 0 0 var(--radius-card);
  color: var(--color-text);
  font-family: inherit;
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform var(--transition-base), background-color var(--transition-base),
    border-color var(--transition-base), color var(--transition-base);
}

/* hover：向左滑出 + 橙色高亮 */
.cs-sidebar-item:hover,
.cs-sidebar-item:focus-visible {
  transform: translateX(-6px);
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.cs-sidebar-item.is-disabled {
  cursor: default;
}

.cs-icon {
  font-size: 20px;
  line-height: 1;
}

/* 收起状态脉冲发光（需求明确要求，保留） */
.cs-sidebar-item--pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* 悬停滑出的信息面板 */
.cs-sidebar-panel {
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 200px;
  padding: 18px 20px;
  text-align: left;
  background: rgba(15, 20, 36, 0.96);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-card);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-50%) translateX(10px);
  transition: opacity var(--transition-base), transform var(--transition-base),
    visibility var(--transition-base);
}

.cs-sidebar-item:hover .cs-sidebar-panel,
.cs-sidebar-item:focus-visible .cs-sidebar-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

.cs-sidebar-panel strong {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.cs-sidebar-panel span {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ============ 11. 入驻页 ============ */
/* 11.1 入驻资质 */
.qualification-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.qualification-card {
  padding: 36px;
}

.qualification-card h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
}

.qualification-card h3 .icon {
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  background: var(--gradient-accent);
  border-radius: var(--radius-tag);
}

/* 11.2 入驻权益 */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.benefit-card {
  padding: 32px;
  text-align: center;
}

.benefit-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background: var(--gradient-accent);
  border-radius: var(--radius-card);
  transition: transform var(--transition-base);
}

.benefit-card:hover .benefit-icon {
  transform: scale(1.1) rotate(5deg);
}

.benefit-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

.benefit-card p {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

/* 11.3 入驻流程步骤条 */
.steps-container {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
}

.steps-container::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 60px;
  right: 60px;
  height: 2px;
  background: var(--color-glass-border);
}

.step-item {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.step-number {
  width: 56px;
  height: 56px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-secondary);
  background: var(--bg-secondary);
  border: 2px solid var(--color-glass-border);
  border-radius: 50%;
  transition: background-color var(--transition-base), border-color var(--transition-base),
    color var(--transition-base), box-shadow var(--transition-base);
}

/* 当前步骤 / hover 高亮 */
.step-item.is-active .step-number,
.step-item:hover .step-number,
.step-item:focus-within .step-number {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 20px rgba(255, 107, 44, 0.3);
}

.step-item h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.step-item p {
  max-width: 130px;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* hover 展示补充说明 */
.step-tip {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  z-index: 5;
  width: 210px;
  padding: 10px 14px;
  text-align: center;
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  background: rgba(15, 20, 36, 0.98);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-tag);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(6px);
  transition: opacity var(--transition-base), transform var(--transition-base),
    visibility var(--transition-base);
}

.step-item:hover .step-tip,
.step-item:focus-within .step-tip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ============ 12. 表单 ============ */
.form-container {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px;
}

.form-type-switch {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 32px;
}

.form-type-btn {
  padding: 10px 24px;
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-button);
  color: var(--color-text-secondary);
  font-family: inherit;
  font-size: var(--font-size-small);
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast),
    color var(--transition-fast);
}

.form-type-btn.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.form-type-btn:hover:not(.is-active) {
  border-color: var(--color-primary);
  color: var(--color-text);
}

.form-group {
  margin-bottom: 24px;
}

.form-group > label,
.form-group > .form-label {
  display: block;
  margin-bottom: 8px;
  font-size: var(--font-size-small);
  font-weight: 500;
  color: var(--color-text-secondary);
}

.form-group .required {
  margin-left: 2px;
  color: var(--color-primary);
}

.form-control {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-input);
  color: var(--color-text);
  font-family: var(--font-family);
  font-size: 15px;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

/* 输入框 focus 橙色高亮边框 */
.form-control:focus {
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 0 0 3px rgba(255, 107, 44, 0.15);
}

.form-control::placeholder {
  color: var(--color-text-muted);
}

.form-control[aria-invalid='true'] {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.form-error {
  display: none;
  margin-top: 6px;
  font-size: 12px;
  color: var(--color-danger);
}

.form-error.is-visible {
  display: block;
}

select.form-control {
  appearance: none;
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23FAF5EF' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}

select.form-control option {
  background: var(--bg-secondary);
  color: var(--color-text);
}

textarea.form-control {
  min-height: 100px;
  resize: vertical;
}

/* 12.1 主营品类多选下拉 */
.multi-select {
  position: relative;
}

.multi-select-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-input);
  color: var(--color-text);
  font-family: inherit;
  font-size: 15px;
  text-align: left;
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

.multi-select-trigger:focus-visible,
.multi-select.is-open .multi-select-trigger {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 107, 44, 0.15);
}

.multi-select[aria-invalid='true'] .multi-select-trigger {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.multi-select-value {
  flex: 1 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.multi-select-value.is-placeholder {
  color: var(--color-text-muted);
}

.multi-select-arrow {
  flex: 0 0 auto;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--color-text-secondary);
  transition: transform var(--transition-fast);
}

.multi-select.is-open .multi-select-arrow {
  transform: rotate(180deg);
}

.multi-select-panel {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% + 6px);
  z-index: 60;
  display: none;
  max-height: 280px;
  overflow-y: auto;
  padding: 8px;
  background: rgba(15, 20, 36, 0.98);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-card);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.multi-select.is-open .multi-select-panel {
  display: block;
}

.multi-select-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-input);
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.multi-select-option:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text);
}

.multi-select-option input {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

/* 12.2 协议勾选 */
.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 24px;
  cursor: pointer;
}

.form-checkbox input[type='checkbox'] {
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.form-checkbox span {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.form-checkbox a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 接口业务错误提示条（如手机号已申请、提交过于频繁） */
.form-alert {
  margin-top: 8px;
  padding: 12px 16px;
  font-size: var(--font-size-small);
  line-height: 1.6;
  color: var(--color-text);
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.45);
  border-radius: var(--radius-input);
}

.form-alert[hidden] {
  display: none;
}

.form-submit {
  margin-top: 32px;
  text-align: center;
}

.form-submit .btn {
  min-width: 220px;
}

/* ============ 13. 成功弹窗 ============ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.modal-overlay.is-open {
  display: flex;
}

.modal-content {
  width: 100%;
  max-width: 420px;
  padding: 48px;
  text-align: center;
  background: var(--bg-secondary);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-card);
  animation: modalIn 300ms ease-out;
}

.modal-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  background: var(--gradient-green);
  border-radius: 50%;
}

.modal-content h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.modal-content p {
  margin-bottom: 24px;
  color: var(--color-text-secondary);
}

/* ============ 13.1 轻量提示条 ============ */
.ths-toast {
  position: fixed;
  left: 50%;
  bottom: 40px;
  z-index: 2100;
  max-width: 90vw;
  padding: 12px 24px;
  font-size: var(--font-size-small);
  color: var(--color-text);
  background: rgba(15, 20, 36, 0.96);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-button);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(12px);
  transition: opacity var(--transition-base), transform var(--transition-base),
    visibility var(--transition-base);
  pointer-events: none;
}

.ths-toast.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ============ 14. 企业介绍页 ============ */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.about-intro-text h2 {
  font-size: var(--font-size-h2);
  font-weight: 700;
  margin-bottom: 24px;
}

.about-intro-text p {
  font-size: var(--font-size-body);
  line-height: 1.9;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

/* 预留企业形象配图位置 */
.about-intro-image {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 320px;
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-card);
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.mission-card {
  padding: 40px;
  text-align: center;
}

.mission-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background: var(--gradient-accent);
  border-radius: var(--radius-card);
}

.mission-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.mission-card p {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.system-card {
  padding: 36px;
}

.system-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  background: var(--gradient-accent);
  border-radius: var(--radius-icon);
}

.system-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

.compliance-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 860px;
  margin: 0 auto;
}

.compliance-item {
  padding: 16px 24px;
  text-align: center;
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-input);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.compliance-item:hover {
  border-color: var(--color-primary);
  background: rgba(255, 107, 44, 0.05);
}

.compliance-item a {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

.compliance-item:hover a {
  color: var(--color-primary);
  text-decoration-color: currentColor;
}

.contact-info {
  max-width: 620px;
  margin: 0 auto;
  text-align: center;
}

.contact-info-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px 0;
}

.contact-info-item .icon {
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-icon);
}

.contact-info-item span {
  font-size: 15px;
  color: var(--color-text-secondary);
}

/* ============ 15. 动效 ============ */@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(2%, -2%) rotate(1deg); }
  66% { transform: translate(-1%, 1%) rotate(-0.5deg); }
}

@keyframes heroFloat2 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(-3%, 2%) rotate(1deg); }
}

@keyframes blobFloat1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(20px, -30px); }
}

@keyframes blobFloat2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-25px, 20px); }
}

@keyframes blobFloat3 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(15px, 25px); }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 107, 44, 0.4); }
  50% { box-shadow: 0 0 15px 5px rgba(255, 107, 44, 0.2); }
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* 滚动入场 fade-in-up（进入视口 20% 触发，见 js/main.js） */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ============ 16. 响应式 ============ */
@media (max-width: 1024px) {
  :root {
    --font-size-h1: 38px;
    --font-size-h2: 30px;
    --font-size-h3: 20px;
    --section-padding: 72px 0;
  }

  .advantages-grid,
  .business-grid,
  .benefits-grid,
  .system-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-intro {
    grid-template-columns: 1fr;
  }

  .navbar-menu {
    gap: 24px;
  }
}

@media (max-width: 860px) {
  .navbar-menu,
  .navbar-actions .btn {
    display: none;
  }

  .hamburger {
    display: flex;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-h1: 30px;
    --font-size-h2: 26px;
    --font-size-h3: 18px;
    --section-padding: 56px 0;
    --navbar-height: 64px;
  }

  .hero {
    min-height: 88vh;
    padding: 120px 0 72px;
  }

  .hero-subtitle,
  .page-hero-subtitle {
    font-size: 16px;
  }

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

  .hero-buttons .btn {
    width: 100%;
  }

  .page-hero {
    min-height: 40vh;
    padding: 130px 0 72px;
  }

  .cooperation-grid,
  .cta-grid,
  .qualification-grid,
  .mission-grid {
    grid-template-columns: 1fr;
  }

  .download-panel {
    flex-direction: column;
    text-align: center;
    padding: 32px 24px;
  }

  .download-actions {
    justify-content: center;
  }

  .download-info h3 {
    font-size: 18px;
  }

  .business-card-header,
  .business-card-body {
    padding-left: 24px;
    padding-right: 24px;
  }

  /* 步骤条：移动端自动纵向排布 */
  .steps-container {
    flex-direction: column;
    align-items: stretch;
    gap: 28px;
    padding-left: 0;
  }

  .steps-container::before {
    top: 28px;
    bottom: 28px;
    left: 27px;
    right: auto;
    width: 2px;
    height: auto;
  }

  .step-item {
    flex-direction: row;
    align-items: flex-start;
    text-align: left;
    gap: 16px;
  }

  .step-number {
    flex: 0 0 56px;
    margin-bottom: 0;
  }

  .step-item p {
    max-width: none;
  }

  /* 移动端补充说明常显，替代 hover 悬浮 */
  .step-tip {
    position: static;
    width: auto;
    margin-top: 6px;
    padding: 0;
    text-align: left;
    background: none;
    border: none;
    box-shadow: none;
    color: var(--color-text-muted);
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .form-container {
    padding: 32px 20px;
  }

  .form-type-switch {
    flex-direction: column;
    align-items: stretch;
  }

  .footer-content {
    flex-direction: column;
    gap: 28px;
  }

  /* 移动端隐藏客服侧边栏（避免遮挡内容） */
  .cs-sidebar {
    display: none;
  }

  /* 移动端禁用 3D 倾斜（需求：性能优化） */
  .tilt-card {
    transform: none !important;
  }
}

@media (max-width: 560px) {
  .advantages-grid,
  .business-grid,
  .benefits-grid,
  .system-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-h1: 26px;
    --font-size-h2: 22px;
    --container-padding: 0 16px;
  }

  .glass-card {
    padding: 24px;
  }

  .advantage-card,
  .benefit-card,
  .cooperation-card,
  .mission-card,
  .system-card,
  .qualification-card {
    padding: 28px 20px;
  }

  .modal-content {
    padding: 32px 24px;
  }
}

/* ============ 17. 无障碍与降级 ============ */
/* 尊重系统「减少动态效果」设置 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }
}

/* 不支持毛玻璃时的兜底底色 */
@supports not ((backdrop-filter: blur(10px)) or (-webkit-backdrop-filter: blur(10px))) {
  .glass-card,
  .cs-sidebar-item,
  .mobile-menu,
  .navbar.is-scrolled {
    background: rgba(15, 20, 36, 0.96);
  }
}

/* 打印样式 */
@media print {
  .navbar,
  .cs-sidebar,
  .mobile-menu,
  .hero-bg,
  .download-panel {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }
}