/* ============================================
   Base Styles - Header & Footer Components
   ============================================ */

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

html {
    width: 100%;
    min-width: 100%;
    overflow-x: hidden;
    -webkit-text-size-adjust: 100%;
}

/* 响应式字体变量 */
:root {
    --base-font-size: 16px;
    --small-font-size: 14px;
    --tiny-font-size: 12px;
}

/* 768px 以下的响应式字体 */
@media (max-width: 768px) {
    :root {
        --base-font-size: 1rem;
        --small-font-size: 0.875rem;
        --tiny-font-size: 0.75rem;
    }
    html {
        font-size: 12px;
    }
    body {
        font-size: 1.5rem; /* 15px 基准 */
    }
}

/* 480px 以下固定 15px 基准 */
@media (max-width: 480px) {
    body {
        font-size: 1.5rem; /* 15px 固定 */
    }
}
/* Font Face Declarations */
@font-face {
  font-family: 'AlibabaPuHuiTi_2_55_Regular';
  src: url('../fonts/AlibabaPuHuiTi-2.55-Regular.woff2') format('woff2'),
       url('../fonts/AlibabaPuHuiTi-2.55-Regular.ttf') format('truetype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'AlibabaPuHuiTi_2_65_Medium';
  src: url('../fonts/AlibabaPuHuiTi-2.65-Medium.woff2') format('woff2'),
       url('../fonts/AlibabaPuHuiTi-2.65-Medium.ttf') format('truetype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'AlibabaPuHuiTi_2_65_Bold';
  src: url('../fonts/AlibabaPuHuiTi-2.85-Bold.woff2') format('woff2'),
       url('../fonts/AlibabaPuHuiTi-2.85-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}


@font-face {
  font-family: 'AlibabaPuHuiTi_2_85_Bold';
  src: url('../fonts/AlibabaPuHuiTi-2.85-Bold.woff2') format('woff2'),
       url('../fonts/AlibabaPuHuiTi-2.85-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'AlibabaPuHuiTi_2_95_ExtraBold';
  src: url('../fonts/AlibabaPuHuiTi-2.95-ExtraBold.woff2') format('woff2'),
       url('../fonts/AlibabaPuHuiTi-2.95-ExtraBold.ttf') format('truetype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

body {
    width: 100%;
    min-width: 100%;
    font-family: 'AlibabaPuHuiTi_2_55_Regular';
    color: #2B2D42;
    background-color: #FFFFFF;
    line-height: 1.6;
    overflow-x: hidden;
    padding-top: 120px; /* 与首页一致：固定 header 下内容区顶部留白 */
}

body.menu-open {
    overflow: hidden;
}

/* 菜单打开时的遮罩效果通过header::after实现，无需额外设置内容区域z-index */

/* 确保菜单和遮罩层在所有内容之上 - 已在媒体查询中设置 */

.header-container {
    width: 100%;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    /* padding: 0 40px; */
}

/* ============================================
   Header Styles
   ============================================ */
.header {
    background-color: #FFFFFF;
    padding: 20px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 999;
    box-shadow: 0px 2px 6px 0px rgba(0, 0, 0, 0.14);
}

/* 移动端菜单打开时，header需要更高的z-index，但保持吸顶效果 */
@media (max-width: 768px) {
    body.menu-open .header {
        z-index: 999;
        /* 保持position: sticky，确保吸顶效果 */
    }

    .header {
        padding: 10px 0;
    }
}

.header .header-content {
    display: flex;
    align-items: center;
}

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

.header .logo .logo-icon {
    display: flex;
    align-items: center;
}

.header .logo .logo-text {
    font-size: var(--base-font-size);
    font-weight: 700;
    color: #2B2D42;
    letter-spacing: 1px;
}

/* PC 端：菜单与 logo 间距 290px，菜单项之间 64px；随屏幕变小逐步减小 */
.header .nav-menu {
    display: flex;
    align-items: center;
    margin-left: 290px;
}

.header .nav-menu .nav-links {
    display: flex;
    align-items: center;
    gap: 64px;
}

.header .nav-link {
    color: #2B2D42;
    text-decoration: none;
    font-size: var(--base-font-size);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.header .nav-link:hover,
.header .nav-link.active {
    color: #E63946;
}

.header .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #E63946;
}

/* Navigation Dropdown */
.header .nav-dropdown {
    position: relative;
}

.header .nav-dropdown .dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
}

.header .nav-dropdown .dropdown-arrow {
    transition: transform 0.3s ease;
}

.header .nav-dropdown:hover .dropdown-arrow,
.header .nav-dropdown.active .dropdown-arrow {
    transform: rotate(180deg);
}

.header .nav-dropdown .dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    background: white;
    border: 1px solid #E0E0E0;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    min-width: 280px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    padding: 8px 0;
}

.header .nav-dropdown:hover .dropdown-menu,
.header .nav-dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.header .nav-dropdown .dropdown-item {
    display: block;
    padding: 12px 20px;
    color: #2B2D42;
    text-decoration: none;
    font-size: var(--small-font-size);
    transition: background-color 0.2s ease, color 0.2s ease;
}

.header .nav-dropdown .dropdown-item:hover {
    background-color: #F5F5F5;
    color: #E63946;
}

/* Language Selector */
.header .language-selector {
    position: relative;
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    padding: 2px 12px;
    border: 1px solid #E0E0E0;
    border-radius: 30px;
    transition: all 0.3s ease;
}

/* PC 端：右侧单独语言切换按钮（第三块区域，贴右） */
.header .language-selector-desktop {
    margin-left: auto;
}

/* PC 端：隐藏侧滑菜单版本的语言切换，仅保留右侧按钮 */
@media (min-width: 769px) {
    .header .nav-menu .language-selector-mobile {
        display: none;
    }
}

.header .language-selector:hover {
    border-color: #2B2D42;
}

.header .language-selector .lang-text {
    font-size: var(--small-font-size);
    font-weight: 500;
    color: #2B2D42;
}

.header .language-selector .lang-arrow {
    transition: transform 0.3s ease;
}

.header .language-selector:hover .lang-arrow {
    transform: translateY(2px);
}

.header .language-selector .language-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: white;
    border: 1px solid #E0E0E0;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    min-width: 150px;
    z-index: 1000;
    overflow: hidden;
}

.header .language-selector .language-item {
    padding: 12px 16px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    color: #2B2D42;
    font-size: var(--small-font-size);
}

.header .language-selector .language-item:hover {
    background-color: #F5F5F5;
}

.header .language-selector .language-item.active {
    background-color: #F0F0F0;
    font-weight: 600;
}

/* Hamburger Menu */
.header .hamburger-menu {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
    position: relative;
}

.header .hamburger-menu span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #2B2D42;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.header .hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.header .hamburger-menu.active span:nth-child(2) {
    opacity: 0;
}

.header .hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ============================================
   Footer Styles
   ============================================ */
.footer {
    padding: 20px 0;
    background-color: #FFFFFF;
    border-top: 1px solid #F0F0F0;
}

.footer .footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer .logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer .logo .logo-icon {
    display: flex;
    align-items: center;
}

.footer .logo .logo-text {
    font-size: var(--base-font-size);
    font-weight: 700;
    color: #2B2D42;
    letter-spacing: 1px;
}

.footer .copyright {
    font-size: var(--small-font-size);
    color: #6C757D;
}

/* ============================================
   Responsive Design - Header & Footer
   ============================================ */
@media (max-width: 1200px) {
    .header .nav-menu {
        margin-left: 220px;
    }
    .header .nav-menu .nav-links {
        gap: 48px;
    }
}

@media (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }
    .header .nav-menu {
        margin-left: 160px;
    }
    .header .nav-menu .nav-links {
        gap: 40px;
    }
}

@media (max-width: 900px) {
    .header .nav-menu {
        margin-left: 100px;
    }
    .header .nav-menu .nav-links {
        gap: 32px;
    }
}

@media (max-width: 768px) {
    body {
        padding-top: 40px; /* 移动端与首页一致 */
    }
    .container {
        padding: 0 20px;
    }

    .header .header-content {
        position: relative;
        z-index: 100003;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .header .hamburger-menu {
        display: flex;
        order: 1;
        margin-left: auto;
    }

    .header .logo {
        order: 0;
        flex: 1;
    }

    /* 移动端：顶部隐藏桌面语言按钮，使用侧滑菜单中的版本 */
    .header .language-selector-desktop {
        display: none;
    }

    .header .nav-menu .language-selector-mobile {
        display: flex;
        margin-top: 16px;
        align-self: flex-start;
    }

    /* 遮罩层：在顶栏和侧滑菜单之下，点击遮罩可关闭菜单 */
    .header::after {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        z-index: 100001;
        pointer-events: none;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    body.menu-open .header::after {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .header .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: #FFFFFF;
        flex-direction: column;
        padding: 40px 20px 20px;
        box-shadow: -4px 0 12px rgba(0, 0, 0, 0.15);
        transition: right 0.3s ease;
        margin-left: 0;
        z-index: 100002;
        overflow-y: auto;
    }

    .header .nav-menu .nav-links {
        display: flex;
        flex-direction: column;
        gap: 0;
        width: 100%;
    }

    .header .nav-menu.mobile-open {
        right: 0;
    }

    .header .nav-link {
        padding: 16px 0;
        border-bottom: 1px solid #F0F0F0;
        width: 100%;
        display: block;
    }

    .header .nav-link:last-child {
        border-bottom: none;
    }

    .header .nav-dropdown {
        width: 100%;
    }

    .header .nav-dropdown .dropdown-toggle {
        width: 100%;
        justify-content: space-between;
    }

    .header .nav-dropdown .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        border-top: 1px solid #F0F0F0;
        margin-top: 0;
        padding: 0;
        min-width: auto;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        background: #FFFFFF;
    }

    .header .nav-dropdown.active .dropdown-menu {
        max-height: 300px;
    }

    .header .nav-dropdown .dropdown-item {
        padding: 12px 0 12px 20px;
        font-size: 14px;
    }

    .header .language-selector {
        margin-top: 12px;
        width: 100%;
        justify-content: space-between;
    }

    .footer {
        padding: 10px 0;
    }

    .footer .footer-content {
        flex-direction: column;
        /* gap: 20px; */
        text-align: center;
    }
}

/* 480px 以下将 12px、13px、14px 字体设置为 1.1rem */
@media (max-width: 480px) {
    .header .nav-dropdown .dropdown-item,
    .footer .copyright {
        font-size: 1.1rem !important;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}