html {
	height: 100%;
}

body {
	width: 100%;
	height: 100%;
	margin: 0;
	padding: 0;
}

.page_container {
	width: 100%;
	min-height: 100%;
	display: flex;
	flex-direction: column;
	position: relative;
	/* overflow: auto; */
}

.page_container_background {
	background: linear-gradient(to bottom, #E4EEF6 0%, #C9DDF4 100%);
}

.top_image{
	width: 70%;
	position: absolute;
	z-index: 0;
}

.app_info_container {
	width: 88%;
	display: flex;
	flex-direction: row;
	align-self: center;
	justify-content: center;
	align-items: center;
	margin-top: 40px;
	margin-bottom: 10px;
}

.app_logo_container {
	width: 12%; /* 设置宽度为父容器的 50% */
	position: relative;
}

.app_logo_container::before{
	content: '';
	display: block;
	padding-top: 100%; /* 设置高度为宽度的 100%，即 1:1 比例 */
}

.app_logo {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	object-fit: cover; /* 确保图片内容按比例填充 */
	align-self: center;
}

.download_view_title{
	width: auto;
	font-weight: 400;
	font-size: 30px;
	color: #2B3A4A;
	text-align: center;
	font-style: normal;
	text-transform: none;
	margin-left: 14px;
}

.download_btn{
	width: 88%;
	height: 50px;
	line-height: 50px;
	border-radius: 9px;
	border: 1px solid #91979E;
	align-self: center;
	margin-top: 24px;
	display: flex;
	flex-direction: row;
	align-items: center;
	justify-content: flex-start;
}

.download_btn_icon {
	width: 35px;
	height: 35px;
	margin-left: 10%;
}

.download_btn_text{
	flex: 1;
	width: 0;
	text-align: center;
	white-space: nowrap;
	color: #2B3A4A;
	margin-right: calc(10% + 35px);
}

.module_parent{
	width: 100%;
	margin-top: 30px;
	display: flex;
	flex-direction: column;
	align-items: center;
}

.module_title_view{
	width: 65%;
	height: 50px;
	line-height: 50px;
	background-image: url("../img/module_title_bg.webp");
	background-position: center center;
	background-repeat: no-repeat;
	background-size: contain;
	font-weight: 500;
	font-size: 20px;
	color: #FFFFF1;
	text-align: center;
	font-style: normal;
	text-transform: none;
	z-index: 2;
}

.module_content_view{
	width: calc(90% - 40px);
	background-color: #F7FBFF;
	border-radius: 12px;
	margin-top: -25px;
	font-size: 18px;
	line-height: 30px;
	padding-top: 35px;
	padding-left: 20px;
	padding-right: 20px;
	padding-bottom: 20px;
	color: #3D3D3D;
}

.mudule_screenshot_image{
	width: 100%;
}

.wechat_page{
	display: none;
	width: 100%;
	height: 100%;
	background-image: url("../img/wechat_tip.png");
	background-position: center center;
	background-repeat: no-repeat;
	background-size: cover;
}

/* ---- 连接教程页 tutorial.html:顶栏(毛玻璃,照 FAQ / landing.css 的 nav-bar) ---- */

.tut_nav {
	width: 100%;
	height: 52px;
	background: rgba(228, 238, 246, .5);
	backdrop-filter: blur(20px);
	-webkit-backdrop-filter: blur(20px);
	display: flex;
	align-items: center;
	padding: 0 16px;
	position: sticky;
	top: 0;
	z-index: 100;
	flex-shrink: 0;
}

.tut_back {
	font-size: 26px;
	color: #2B3A4A;
	line-height: 1;
	text-decoration: none;
	padding: 2px 8px 4px 0;
	flex-shrink: 0;
}

.tut_nav_title {
	position: absolute;
	left: 50%;
	transform: translateX(-50%);
	font-size: 16px;
	font-weight: 600;
	color: #2B3A4A;
	white-space: nowrap;
}

/* 顶栏之下的背景线稿从顶栏下沿开始 */
.tut_nav + .top_image {
	top: 52px;
}

/* ---- 连接教程视频(照 landing.css 的 .vid-wrap) ---- */

.module_content_media {
	display: flex;
	flex-direction: column;
	align-items: center;
}

.vid-wrap {
	position: relative;
	background: #000;
	aspect-ratio: 9 / 20;           /* 教程视频 720×1600,完整显示不裁切 */
	width: 72%;
	max-width: 280px;
	border-radius: 24px;
	overflow: hidden;
	box-shadow: 0 6px 24px rgba(0, 0, 0, .18);
}

.tut-video {
	width: 100%;
	height: 100%;
	display: block;
	object-fit: contain;
}

.vid-btn {
	position: absolute;
	top: 14px;
	right: 14px;
	width: 42px;
	height: 42px;
	padding: 0;
	border-radius: 50%;
	background: rgba(50, 50, 50, .52);
	backdrop-filter: blur(10px);
	-webkit-backdrop-filter: blur(10px);
	border: none;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
}

.vid-tip-err {
	color: #c0392b;
}

.vid-tip {
	margin: 16px 0 0;
	font-size: 14px;
	line-height: 1.7;
	color: #5a6b7b;
	text-align: center;
}

/* ---- 使用说明:各界面截图 + 按钮图例(照 landing.css 的 .usage-*) ---- */

.usage_content {
	/* 字号/行高继承 .module_content_view(18px / 30px),与「应用介绍」模块一致 */
	padding-left: 16px;
	padding-right: 16px;
}

.usage-sub {
	padding-bottom: 28px;
	margin-bottom: 8px;
	border-bottom: 1px solid rgba(43, 58, 74, .08);
}

.usage-sub:last-child {
	border-bottom: none;
	padding-bottom: 0;
	margin-bottom: 0;
}

.usage-sub-title {
	font-size: 20px;
	font-weight: 700;
	color: #2B3A4A;
	text-align: center;
	padding: 18px 0;
	letter-spacing: 1px;
}

.usage-shot-full {
	width: 72%;
	max-width: 280px;
	display: block;
	margin: 0 auto 22px;
	border-radius: 24px;
	box-shadow: 0 6px 24px rgba(0, 0, 0, .18);
}

.usage-shot-full-ph {
	width: 72%;
	max-width: 280px;
	aspect-ratio: 9 / 18;
	display: flex;
	align-items: center;
	justify-content: center;
	margin: 0 auto 22px;
	border-radius: 24px;
	background: #eef4ff;
	border: 1px dashed #aac4e8;
	font-size: 12px;
	color: #88aacc;
}

.usage-desc {
	padding: 0 4px;
	font-size: 18px;
	color: #3D3D3D;
	line-height: 30px;
}

.usage-desc > p {
	color: #4a5a7a;
	margin: 0 0 14px;
}

.usage-btn-list {
	list-style: none;
	padding: 0;
	margin: 0;
}

.usage-btn-item {
	display: flex;
	align-items: flex-start;
	gap: 11px;
	margin-bottom: 12px;
}

.ui-btn {
	flex-shrink: 0;
	display: flex;
	align-items: center;
	margin-top: 0;   /* 图标高 30px,与正文 30px 行高对齐 */
}

/* 图标按自身纵横比显示,统一高度,不拉伸 */
.ui-btn img {
	height: 30px;
	width: auto;
	display: block;
}

.usage-btn-text {
	flex: 1;
	font-size: 18px;
	color: #3D3D3D;
	line-height: 30px;
}