html {
    font-size: 16px;
}

:root {
    /* 主色 */
    --primary-blue: #0174e3;
    --primary-blue-dark: #005bb5;
    --primary-cyan: #00e5ff;
    --color-primary: var(--primary-blue);
    --color-active-blue: var(--primary-blue);
    --primary-color: var(--primary-blue);

    /* 文字 */
    --text-main: #1a1a1a;
    --text-dark: #1a1a1a;
    --text-light: #ffffff;
    --text-gray: #666666;
    --text-muted: #999999;
    --color-text-main: var(--text-main);
    --color-text-dark: var(--text-main);
    --color-text-muted: var(--text-gray);
    --color-text-light: var(--text-muted);
    --color-black: #1a1a1a;
    --color-dark-grey: #333333;
    --color-grey: var(--text-gray);
    --color-light-grey: var(--text-muted);

    /* 背景 */
    --bg-white: #ffffff;
    --bg-dark: #000000;
    --bg-card: #f8f9fa;
    --bg-section-dark: #1e2023;
    --bg-light-gray: #f4f5f7;
    --bg-gray: #f5f5f7;
    --bg-light: #f9f9f9;
    --bg-offwhite: #fafafa;
    --color-bg-white: var(--bg-white);
    --color-bg-black: var(--bg-dark);
    --color-bg-light: var(--bg-light);
    --color-bg-gray: var(--bg-gray);
    --color-beige: #faf9f6;
    --color-form-bg: #f6f5f0;
    --color-hero-bg: #f4efe9;

    /* 边框 */
    --border-color: #e5e5e5;
    --color-border: var(--border-color);
    --color-lightest-grey: #e5e5e5;

    /* 字体 */
    --font-main: Arial, Helvetica, sans-serif, "Arial Narrow", 'MicrosoftYaHei', 'Microsoft YaHei', "微软雅黑", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto;
    --font-family: var(--font-main);

    /* 布局 */
    --container-width: 1280px;

    /* 过渡 */
    --transition: all 0.3s ease;
    --transition-speed: 0.3s;
}

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

body {
    font-family: var(--font-main);
    color: var(--text-main);
    background-color: var(--bg-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-width: 1400px;
    ;
}

a {
    text-decoration: none;
    color: inherit;
}

ul,
ol {
    list-style: none;
}

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

/* ==========================================================================
   3. 布局工具
   ========================================================================== */
.container {
    width: 1280px;
    margin: 0 auto;
    padding: 0;
}

/* ==========================================================================
   4. 公共组件 — Section Header
   ========================================================================== */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-subtitle {
    color: var(--primary-blue);
    font-size: 13.6px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-main);
}

/* ==========================================================================
   5. Navbar（全站统一 Header）— 基准：index.html
   颜色使用固定值，不受各页 :root 覆盖影响
   ========================================================================== */
.navbar {
    position: sticky;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    min-width: 1400px;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-width: 1300px;
    padding: 0;
}

.logo {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: 1px;
    color: #1a1a1a;
}

.logo img {
    width: 100%;
    max-height: 40px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
    font-size: 0;
    line-height: 0;
}

.nav-links a {
    font-size: 14.4px;
    font-weight: 500;
    color: #666666;
    transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: #0072ce;
}

.lang-switch {
    font-weight: 700;
    color: #1a1a1a;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: #1a1a1a;
}

.menu-toggle svg {
    width: 24px;
    height: 24px;
}

/* navbar 搜索框（expandable：默认小圆，focus 平滑展开）— 全站统一 */

/* navbar 搜索框（expandable：默认小圆，focus 平滑展开）— 全站统一 */
.nav-links li:has(.form-search) {
    width: 100px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.navbar .form-search input[type=search] {
    -webkit-appearance: textfield;
    font-family: inherit;
    font-size: 14.4px;
    line-height: 1.4;
}

.navbar .form-search input::-webkit-search-decoration,
.navbar .form-search input::-webkit-search-cancel-button {
    display: none;
}

.navbar .form-search input[type=search] {
    background: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath fill='%23666' d='M416 208c0 45.9-14.9 88.3-40 122.7L502.6 457.4c12.5 12.5 12.5 32.8 0 45.3s-32.8 12.5-45.3 0L330.7 376c-34.4 25.2-76.8 40-122.7 40C93.1 416 0 322.9 0 208S93.1 0 208 0S416 93.1 416 208zM208 352a144 144 0 1 0 0-288 144 144 0 1 0 0 288z'/%3E%3C/svg%3E") no-repeat 10px center;
    background-size: 16px 16px;
    border: 1px solid transparent;
    padding: 4px 10px;
    width: 32px;
    border-radius: 10em;
    transition: all 0.5s;
    cursor: pointer;
    box-shadow: none;
    color: transparent;
    outline: none;
    height: 32px;
}

.navbar .form-search input[type=search]:hover {
    background-color: #f0f0f0;
}

.navbar .form-search input[type=search]:focus {
    border-color: #0072ce;
    width: 250px;
    padding-left: 28px;
    padding-right: 10px;
    color: #000;
    background-color: #fff;
    cursor: auto;
    box-shadow: 0 0 5px rgba(0, 114, 206, 0.4);
}

.navbar .form-search input[type=search]:focus::placeholder {
    color: #999;
    font-size: 13.6px;
}

.navbar .form-search input::placeholder {
    color: transparent;
    font-size: 13.6px;
}


.search-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s ease;
}

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

.search-btn:hover,
.search-btn.active {
    background-color: #f0f0f0;
}

.search-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #ffffff;
    border-top: 1px solid #eeeeee;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
    display: none;
    z-index: 1001;
}

.search-dropdown.open {
    display: block;
}

.search-dropdown-inner {
    position: relative;
    width: 900px;
    min-height: 300px;
    max-width: 100%;
    margin: 0 auto;
    padding: 28px 20px 36px;
}

.search-close {
    position: absolute;
    top: 24px;
    right: 24px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.search-close svg {
    width: 16px;
    height: 16px;
}

.search-close:hover {
    background-color: #f0f0f0;
}

.search-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    max-width: 720px;
    border-bottom: 2px solid #e5e5e5;
    padding-bottom: 12px;
    transition: border-color 0.3s ease;
}

.search-bar:focus-within {
    border-color: #0072ce;
}

.search-bar-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    font-family: inherit;
    font-size: 20px;
    color: #1a1a1a;
    background: transparent;
    line-height: 1.4;
}

.search-input::placeholder {
    color: #b0b0b0;
}

.search-go {
    color: #ffffff;
    border: none;
    border-radius: 8px;
    padding: 8px 20px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    flex-shrink: 0;
    background: none;
}

.search-go svg {
    width: 26px;
    height: 26px;
}

.search-body {
    max-width: 720px;
    margin-top: 18px;
}

.search-hot {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.search-hot-title {
    font-size: 13px;
    color: #999999;
}

.search-hot-item {
    font-size: 13px;
    color: #0072ce;
    background-color: #eef6ff;
    border-radius: 20px;
    padding: 4px 14px;
    transition: background 0.3s ease, color 0.3s ease;
}

.search-hot-item:hover {
    background-color: #0072ce;
    color: #ffffff;
}

.search-results-list {
    list-style: none;
    margin-top: 10px;
}

.search-result-item {
    border-bottom: 1px solid #f0f0f0;
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 8px;
    border-radius: 6px;
    transition: background 0.3s ease;
}

.search-result-item a:hover {
    background-color: #f7f9fc;
}

.search-result-title {
    font-size: 15px;
    font-weight: 500;
    color: #1a1a1a;
}

.search-result-title mark {
    background: none;
    color: inherit;
    border-radius: 2px;
}

.search-result-type {
    font-size: 12px;
    color: #999999;
    background: #f0f0f0;
    border-radius: 4px;
    padding: 2px 8px;
    display: none;
}

.search-empty {
    font-size: 14px;
    color: #b0b0b0;
    padding: 14px 8px;
}

.container {
    width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==========================================================================
   6. Footer（全站统一）— 基准：bj.html
   颜色使用固定值，不受各页 :root 覆盖影响
   ========================================================================== */
.footer {
    background-color: #000000;
    color: rgba(255, 255, 255, 0.8);
    text-align: center;
    padding: 40px 0;
    font-size: 15px;
    line-height: 2;
}

.footer p {
    margin: 0;
}

.footer a {
    color: #999999;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: #ffffff;
}

/* ==========================================================================
   7. 移动端导航 — 小屏设备用汉堡菜单展开
   ========================================================================== */
body.nav-mobile .nav-links {
    display: none;
}

body.nav-mobile .nav-links.open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #ffffff;
    padding: 40px 32px;
    gap: 24px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

body.nav-mobile .navbar {
    padding-top: 40px;
    padding-bottom: 40px;
}

body.nav-mobile .nav-links li {
    padding-top: 30px;
    padding-bottom: 30px;
}

body.nav-mobile .nav-links.open a {
    font-size: 40px;
}

body.nav-mobile .menu-toggle {
    display: block;
}

body.nav-mobile .menu-toggle img {
    width: 46px;
    height: 46px;
}

body.nav-mobile .logo img {
    height: 36px;
    max-height: 56px;
}

body.nav-mobile .nav-links li:has(.form-search) {
    width: 100%;
}

body.nav-mobile .navbar .form-search {
    width: 100%;
}

body.nav-mobile .navbar .form-search input[type=search] {
    width: 100%;
    height: auto;
    padding-left: 60px;
    color: #000;
    background-color: #fff;
    cursor: auto;
    border-color: #e0e0e0;
    box-shadow: none;
    font-size: 30px;
    padding-bottom: 20px;
    padding-top: 20px;
    background-size: 36px 36px;
    background-position: 0 0 10px;
}

body.nav-mobile .navbar .form-search input[type=search]:focus {
    width: 100%;
    box-shadow: none;
}

body.nav-mobile .navbar .form-search input[type=search]:focus::placeholder {
    color: #999;
    font-size: 30px;
}

body.nav-mobile .footer {
    font-size: 30px;
}

body.nav-mobile .navbar .container {
    padding: 0 40px;
}

body.nav-mobile .search-input {
    font-size: 50px;
}

body.nav-mobile .search-box-wrapper {
    max-width: 900px;
}

body.nav-mobile .search-dropdown-inner {
    min-height: 800px;
    width: 1100px;
    margin-top: 100px;
}

body.nav-mobile .search-close svg {
    height: 50px;
    width: 50px;
}

body.nav-mobile .search-bar {
    max-width: 920px;
    padding-bottom: 22px;
}

body.nav-mobile .search-go {
    font-size: 50px;
}

body.nav-mobile .search-empty {
    font-size: 40px;
}

body.nav-mobile .search-result-title {
    font-size: 32px;
}

body.nav-mobile .search-result-item a {
    padding: 30px 10px;
    display: block;
}

body.nav-mobile .search-body {
    max-width: 920px;
}

body.nav-mobile .search-go svg {
    width: 50px;
    height: 50px;
}

body.nav-mobile .search-btn svg {
    width: 50px;
    height: 50px;
}

.search-dropdown-inner .search-input {
    border: 0;
}

.fdbtn{
	width:221px;
	height: 63px;
	background:none;
	border: none;
	background-image: url(../img/rqbtnbg.png?t=4);
    background-size: 100%;
	position:fixed;
	right: 0;
	bottom:170px;
	z-index: 100000;
    display: block;
}

.fdbtn span{
	display: block;
	height: 44px;
	line-height: 44px;
	font-size: 16px;
	color: #fff;
	margin-top: 20px;
	margin-left: 46px;
	text-align: center;
    background:none;
	border: none;
    outline: 0;
}
.fdbtn span:hover{
    color: #fff;
}