/**
 * Ubaytech 主样式文件
 * 基于设计系统构建的全站样式
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
@import url('variables.css');
@import url('auth-modal.css');
@import url('skeleton.css');

/* ===== CSS Reset ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
}

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

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

ul,
ol {
    list-style: none;
}

/* ===== 布局工具类 ===== */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--fluid-spacing-sm);
}

.section {
    padding: var(--fluid-spacing-md) 0;
}

.section--gray {
    background-color: var(--color-bg-secondary);
}

.section--dark {
    background-color: var(--color-bg-dark);
    color: var(--color-text-inverse);
}

/* ===== 排版 ===== */
.heading-1 {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    letter-spacing: -0.02em;
}

.heading-2 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    letter-spacing: -0.01em;
}

.heading-3 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
}

.heading-4 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
}

.text-lg {
    font-size: var(--font-size-lg);
}

.text-sm {
    font-size: var(--font-size-sm);
}

.text-muted {
    color: var(--color-text-secondary);
}

.text-center {
    text-align: center;
}

/* ===== 按钮组件 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    white-space: nowrap;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
    color: var(--color-text-inverse);
    box-shadow: 0 4px 14px rgba(30, 136, 229, 0.3);
}

.btn--primary:hover {
    background: linear-gradient(135deg, var(--color-primary-400), var(--color-primary-500));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 136, 229, 0.4);
}

.btn--accent {
    background: linear-gradient(135deg, var(--color-accent-500), var(--color-accent-600));
    color: var(--color-text-inverse);
    box-shadow: 0 4px 14px rgba(255, 107, 53, 0.3);
}

.btn--accent:hover {
    background: linear-gradient(135deg, var(--color-accent-400), var(--color-accent-500));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.btn--outline {
    background: transparent;
    border: 2px solid var(--color-primary-500);
    color: var(--color-primary-500);
}

.btn--outline:hover {
    background: var(--color-primary-500);
    color: var(--color-text-inverse);
}

.btn--lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
}

.btn--sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
}

/* ===== 顶部工具栏 ===== */
.top-bar {
    background: var(--color-primary-900);
    padding: var(--spacing-2) 0;
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.9);
}

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

.top-bar__left {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.top-bar__text {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.top-bar__text i {
    color: var(--color-accent-400);
}

.top-bar__right {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.top-bar__link {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: rgba(255, 255, 255, 0.9);
    transition: color var(--transition-fast);
}

.top-bar__link:hover {
    color: var(--color-accent-400);
}

.top-bar__language {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.top-bar__language-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-sm);
    cursor: pointer;
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.top-bar__language-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-accent-400);
}

.top-bar__language-btn i:last-child {
    font-size: 10px;
    transition: transform var(--transition-fast);
}

.top-bar__language.active .top-bar__language-btn i:last-child {
    transform: rotate(180deg);
}

.top-bar__language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-2);
    min-width: 120px;
    background: var(--color-bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: var(--z-tooltip);
    overflow: hidden;
}

.top-bar__language.active .top-bar__language-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.top-bar__language-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-3) var(--spacing-4);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    transition: background var(--transition-fast);
}

.top-bar__language-option:hover {
    background: var(--color-gray-50);
}

.top-bar__language-option--active {
    color: var(--color-primary-500);
    background: var(--color-primary-50);
}

.top-bar__language-option i {
    font-size: 12px;
    color: var(--color-primary-500);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.top-bar__language-option--active i {
    opacity: 1;
}

/* ===== 头部主导航 ===== */
.header {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: var(--spacing-4) 0;
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-smooth-sm);
    transition: all var(--transition-normal);
}

.header--scrolled {
    padding: var(--spacing-2) 0;
    background: rgba(255, 255, 255, 0.9);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-8);
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    flex-shrink: 0;
}

.header__logo img {
    height: 45px;
}

.header__logo-text {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary-500);
}

/* 搜索框 */
.header__search {
    flex: 1;
    max-width: 600px;
    display: flex;
    border: 2px solid var(--color-accent-500);
    border-radius: var(--radius-md);
    overflow: visible;
    /* 改为 visible 以显示下拉框 */
    position: relative;
}

/* 搜索建议下拉框 */
.search-suggestions {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-smooth-lg);
    z-index: var(--z-dropdown);
    display: none;
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--glass-border);
}

.search-suggestions--active {
    display: block;
}

.search-suggestion-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-3) var(--spacing-4);
    gap: var(--spacing-3);
    cursor: pointer;
    transition: background var(--transition-fast);
    border-bottom: 1px solid var(--color-gray-50);
}

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

.search-suggestion-item:hover {
    background: var(--color-gray-50);
}

.search-suggestion-item__img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    background: var(--color-gray-100);
}

.search-suggestion-item__info {
    flex: 1;
}

.search-suggestion-item__name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    display: block;
    margin-bottom: 2px;
}

.search-suggestion-item__price {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent-500);
}

.search-suggestions__footer {
    padding: var(--spacing-2) var(--spacing-4);
    background: var(--color-gray-50);
    text-align: center;
    font-size: var(--font-size-xs);
    border-top: 1px solid var(--color-gray-100);
    color: var(--color-text-secondary);
}

.header__search-input {
    flex: 1;
    padding: var(--spacing-3) var(--spacing-4);
    border: none;
    font-size: var(--font-size-base);
    outline: none;
}

.header__search-input::placeholder {
    color: var(--color-text-tertiary);
}

.header__search-btn {
    padding: var(--spacing-3) var(--spacing-6);
    background: var(--color-accent-500);
    color: var(--color-text-inverse);
    font-size: var(--font-size-lg);
    transition: background var(--transition-fast);
}

.header__search-btn:hover {
    background: var(--color-accent-600);
}

/* 用户操作 */
.header__actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.header__action {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    color: var(--color-text-primary);
    transition: color var(--transition-fast);
}

.header__action:hover {
    color: var(--color-primary-500);
}

.header__action i {
    font-size: var(--font-size-xl);
}

.header__action--cart {
    position: relative;
}

.header__cart-badge {
    position: absolute;
    top: -8px;
    left: 12px;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-500);
    color: var(--color-text-inverse);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-full);
}

.header__action-text {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.header__action-text span {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.header__action-text strong {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

/* ===== 主导航 ===== */
.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
    flex: 1;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav__item {
    position: relative;
}

.nav__link {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav__link:hover {
    color: var(--color-primary-500);
    background: var(--color-gray-50);
}

.nav__link i {
    font-size: 10px;
    transition: transform var(--transition-fast);
}

.nav__item:hover .nav__link i {
    transform: rotate(180deg);
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.nav__action-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    position: relative;
}

.nav__action-btn:hover {
    color: var(--color-primary-500);
    background: var(--color-gray-50);
}

.nav__action-btn--cart {
    position: relative;
}

.nav__cart-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    min-width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-500);
    color: var(--color-text-inverse);
    font-size: 10px;
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-full);
    padding: 0 4px;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-2);
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav__toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ===== Mega Menu ===== */
.mega-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 700px;
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-6);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: var(--z-dropdown);
}

.nav__item:hover .mega-menu {
    opacity: 1;
    visibility: visible;
}

.mega-menu__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-6);
}

.mega-menu__category {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.mega-menu__title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    padding-bottom: var(--spacing-2);
    border-bottom: 2px solid var(--color-primary-500);
    margin-bottom: var(--spacing-2);
}

.mega-menu__link {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    padding: var(--spacing-2) 0;
    transition: color var(--transition-fast);
}

.mega-menu__link:hover {
    color: var(--color-primary-500);
}

/* ===== 响应式导航 ===== */
@media (max-width: 992px) {
    .nav__list {
        display: none;
    }

    .nav__toggle {
        display: flex;
    }

    .mega-menu {
        display: none;
    }
}

/* ===== 分类导航栏 ===== */
.category-nav {
    background: var(--color-primary-900);
    position: sticky;
    top: 77px;
    z-index: calc(var(--z-fixed) - 1);
}

.category-nav__inner {
    display: flex;
    align-items: stretch;
}

/* ALL CATEGORIES 下拉 */
.category-nav__dropdown {
    position: relative;
}

.category-nav__trigger {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-4) var(--spacing-6);
    background: var(--color-accent-500);
    color: var(--color-text-inverse);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    cursor: pointer;
    transition: background var(--transition-fast);
    min-width: 220px;
}

.category-nav__trigger:hover {
    background: var(--color-accent-600);
}

.category-nav__menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-bg-primary);
    box-shadow: var(--shadow-xl);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: var(--z-dropdown);
}

.category-nav__dropdown:hover .category-nav__menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.category-nav__menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-5);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    border-bottom: 1px solid var(--color-gray-100);
}

.category-nav__menu-item:last-child {
    border-bottom: none;
}

.category-nav__menu-item:hover {
    background: var(--color-primary-50);
    color: var(--color-primary-500);
    padding-left: var(--spacing-6);
}

.category-nav__menu-item i {
    width: 20px;
    text-align: center;
    color: var(--color-primary-500);
}

/* 快捷导航链接 */
.category-nav__links {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    padding-left: var(--spacing-6);
}

.category-nav__link {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) var(--spacing-5);
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
}

.category-nav__link:hover,
.category-nav__link--active {
    color: var(--color-text-inverse);
    background: rgba(255, 255, 255, 0.1);
}

.category-nav__link--hot {
    color: var(--color-accent-400);
}

.category-nav__link--hot:hover {
    color: var(--color-accent-300);
}


/* 移动端菜单按钮 */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-2);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    cursor: pointer;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

/* ===== Hero 区域 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero__slider {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero__slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s ease;
}

.hero__slide--active {
    opacity: 1;
}

.hero__slide-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
            rgba(10, 25, 41, 0.9) 0%,
            rgba(10, 25, 41, 0.7) 50%,
            rgba(10, 25, 41, 0.5) 100%);
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    color: var(--color-text-inverse);
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-6);
    backdrop-filter: blur(10px);
}

.hero__title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: var(--font-weight-bold);
    line-height: 1.1;
    margin-bottom: var(--spacing-6);
}

.hero__title span {
    background: linear-gradient(135deg, var(--color-primary-400), var(--color-accent-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__description {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-8);
    line-height: var(--line-height-relaxed);
}

.hero__actions {
    display: flex;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

/* Hero 指示器 */
.hero__indicators {
    position: absolute;
    bottom: var(--spacing-10);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-3);
}

.hero__indicator {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.hero__indicator--active {
    background: var(--color-accent-500);
    transform: scale(1.2);
}

/* ===== 服务背书区 ===== */
.services-bar {
    background: var(--color-bg-primary);
    padding: var(--spacing-10) 0;
    border-bottom: 1px solid var(--color-gray-100);
}

.services-bar__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-8);
}

.service-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    transition: transform var(--transition-normal);
}

.service-item:hover {
    transform: translateY(-4px);
}

.service-item__icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-50), var(--color-primary-100));
    border-radius: var(--radius-xl);
    color: var(--color-primary-500);
    font-size: var(--font-size-2xl);
    flex-shrink: 0;
    transition: all var(--transition-normal);
}

.service-item:hover .service-item__icon {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
    color: var(--color-text-inverse);
    box-shadow: 0 4px 12px rgba(30, 136, 229, 0.3);
}

.service-item__content h4 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-1);
}

.service-item__content p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ===== 章节标题 ===== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-12);
}

.section-header__label {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary-500);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-4);
}

.section-header__title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-4);
}

.section-header__description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* ===== 产品品类展示 ===== */
.categories {
    padding: var(--spacing-20) 0;
}

.categories__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-6);
}

.category-card {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-primary-900), var(--color-primary-700));
    min-height: 320px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--spacing-8);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.category-card__image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
    transition: all var(--transition-normal);
}

.category-card:hover .category-card__image {
    opacity: 0.5;
    transform: scale(1.05);
}

.category-card__content {
    position: relative;
    z-index: 1;
    color: var(--color-text-inverse);
}

.category-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-4);
    font-size: var(--font-size-2xl);
    backdrop-filter: blur(10px);
}

.category-card__title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-2);
}

.category-card__description {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-4);
}

.category-card__link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-accent-400);
    transition: gap var(--transition-fast);
}

.category-card:hover .category-card__link {
    gap: var(--spacing-3);
}

/* ===== 公司优势区 ===== */
.advantages {
    background: var(--color-bg-dark);
    padding: var(--spacing-24) 0;
    color: var(--color-text-inverse);
}

.advantages__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-16);
    align-items: center;
}

.advantages__content {
    max-width: 500px;
}

.advantages__label {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent-500);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-4);
}

.advantages__title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-6);
}

.advantages__description {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-8);
    line-height: var(--line-height-relaxed);
}

.advantages__stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-6);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-6);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item__number {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent-500);
    margin-bottom: var(--spacing-2);
}

.stat-item__label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

.advantages__image {
    position: relative;
    border-radius: var(--radius-2xl);
    overflow: hidden;
}

.advantages__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.advantages__image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, var(--color-primary-500), transparent);
    opacity: 0.2;
}

/* ===== 产品展示区 ===== */
.products {
    padding: var(--spacing-20) 0;
}

.products__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-6);
}

.product-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-smooth-sm);
    transition: all var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-smooth-lg);
}

.product-card__image {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--color-bg-secondary);
}

.product-card__image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: var(--spacing-4);
    transition: transform var(--transition-normal);
}

.product-card:hover .product-card__image img {
    transform: scale(1.05);
}

.product-card__badge {
    position: absolute;
    top: var(--spacing-3);
    left: var(--spacing-3);
    padding: var(--spacing-1) var(--spacing-3);
    background: var(--color-accent-500);
    color: var(--color-text-inverse);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-sm);
}

.product-card__actions {
    position: absolute;
    bottom: var(--spacing-3);
    right: var(--spacing-3);
    display: flex;
    gap: var(--spacing-2);
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-fast);
}

.product-card:hover .product-card__actions {
    opacity: 1;
    transform: translateY(0);
}

.product-card__action {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-primary);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.product-card__action:hover {
    background: var(--color-primary-500);
    color: var(--color-text-inverse);
}

.product-card__content {
    padding: var(--spacing-5);
}

.product-card__category {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-2);
}

.product-card__title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-3);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.product-card__price {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent-500);
}

/* ===== 页脚 ===== */
.footer {
    background: var(--color-primary-900);
    color: var(--color-text-inverse);
    padding-top: var(--spacing-20);
}

.footer__top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--spacing-10);
    padding-bottom: var(--spacing-12);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__brand {
    max-width: 300px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-6);
}

.footer__logo img {
    height: 40px;
}

.footer__logo-text {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
}

.footer__description {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-6);
}

.footer__social {
    display: flex;
    gap: var(--spacing-3);
}

.footer__social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    font-size: var(--font-size-lg);
    transition: all var(--transition-fast);
}

.footer__social-link:hover {
    background: var(--color-primary-500);
    transform: translateY(-3px);
}

.footer__column h4 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-6);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.footer__link {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-accent-500);
}

.footer__contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.footer__contact-item i {
    color: var(--color-primary-400);
    margin-top: 2px;
}

.footer__contact-item span {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-6) 0;
}

.footer__copyright {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
}

.footer__bottom-links {
    display: flex;
    gap: var(--spacing-6);
}

.footer__bottom-links a {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition-fast);
}

.footer__bottom-links a:hover {
    color: var(--color-text-inverse);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1200px) {
    .products__grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer__top {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer__brand {
        grid-column: span 4;
        max-width: 100%;
        margin-bottom: var(--spacing-8);
    }
}

@media (max-width: 992px) {
    .categories__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .advantages__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-10);
    }

    .mega-menu {
        width: 600px;
    }

    .mega-menu__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }

    .nav__list {
        display: none;
    }

    /* 移动端菜单样式修复 */
    .mobile-menu-open .category-nav {
        display: block !important;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        z-index: var(--z-fixed);
        overflow-y: auto;
        animation: slideInRight 0.3s ease forwards;
        background: var(--color-bg-primary);
        border-top: 1px solid var(--color-gray-100);
    }

    .mobile-menu-open .category-nav__inner {
        flex-direction: column;
        padding: var(--spacing-4) 0;
    }

    .mobile-menu-open .category-nav__links {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 0;
        width: 100%;
    }

    .mobile-menu-open .category-nav__link {
        width: 100%;
        padding: var(--spacing-3) var(--spacing-6);
        color: var(--color-text-primary);
        border-bottom: 1px solid var(--color-gray-50);
    }

    .mobile-menu-open .category-nav__link:hover {
        background: var(--color-gray-50);
        color: var(--color-primary-500);
    }

    /* 隐藏下拉菜单触发器，直接显示所有链接 */
    .mobile-menu-open .category-nav__dropdown {
        display: none;
    }

    .nav__toggle {
        display: flex;
    }

    .services-bar__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .products__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero__title {
        font-size: var(--font-size-4xl);
    }

    .hero__actions {
        flex-direction: column;
    }

    .advantages__stats {
        grid-template-columns: 1fr;
    }

    .footer__top {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer__brand {
        grid-column: span 2;
    }

    .footer__bottom {
        flex-direction: column;
        gap: var(--spacing-4);
        text-align: center;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 var(--spacing-4);
    }

    .section {
        padding: var(--spacing-12) 0;
    }

    .categories__grid,
    .products__grid,
    .services-bar__grid {
        grid-template-columns: 1fr;
    }

    .footer__top {
        grid-template-columns: 1fr;
    }

    .footer__brand {
        grid-column: span 1;
    }

    /* ===== 极小屏幕优化 ===== */

    /* 顶部工具栏堆叠 */
    .top-bar__inner {
        flex-direction: column;
        gap: var(--spacing-2);
        text-align: center;
    }

    .top-bar__right {
        flex-wrap: wrap;
        justify-content: center;
    }

    .top-bar__link {
        font-size: var(--font-size-xs);
    }

    .top-bar__language {
        display: none;
    }

    /* 头部简化 */
    .header__search {
        display: none;
    }

    .header__action-text {
        display: none;
    }

    .header__logo-text {
        font-size: var(--font-size-lg);
    }

    /* 字体缩放 */
    .hero__title {
        font-size: var(--font-size-3xl);
    }

    .hero__description {
        font-size: var(--font-size-base);
    }

    .section-header__title {
        font-size: var(--font-size-2xl);
    }

    /* 按钮适配 */
    .btn--lg {
        padding: var(--spacing-3) var(--spacing-6);
        font-size: var(--font-size-base);
    }

    /* 产品卡片优化 */
    .product-card__content {
        padding: var(--spacing-3);
    }

    .product-card__title {
        font-size: var(--font-size-sm);
    }

    /* 分类卡片 */
    .category-card {
        min-height: 200px;
        padding: var(--spacing-5);
    }

    .category-card__title {
        font-size: var(--font-size-lg);
    }

    /* 服务条优化 */
    .service-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-2);
    }

    .service-item__icon {
        width: 44px;
        height: 44px;
        font-size: var(--font-size-lg);
    }
}

/* ===== 动画效果 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fadeIn {
    animation: fadeIn 0.6s ease forwards;
}

.animate-slideInRight {
    animation: slideInRight 0.6s ease forwards;
}

/* 交错动画 */
.stagger-1 {
    animation-delay: 0.1s;
}

.stagger-2 {
    animation-delay: 0.2s;
}

.stagger-3 {
    animation-delay: 0.3s;
}

.stagger-4 {
    animation-delay: 0.4s;
}

.stagger-5 {
    animation-delay: 0.5s;
}

.stagger-6 {
    animation-delay: 0.6s;
}

/* ===== Flash Deals 限时秒杀 ===== */
.flash-deals {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    padding: var(--spacing-12) 0;
}

.flash-deals__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-8);
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.flash-deals__title-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.flash-deals__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent-500), var(--color-accent-600));
    border-radius: var(--radius-lg);
    color: var(--color-text-inverse);
    font-size: var(--font-size-xl);
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.flash-deals__title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-inverse);
}

.flash-deals__badge {
    padding: var(--spacing-1) var(--spacing-3);
    background: var(--color-accent-500);
    color: var(--color-text-inverse);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    text-transform: uppercase;
}

.flash-deals__countdown {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-md);
    min-width: 60px;
}

.countdown-item__value {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent-500);
}

.countdown-item__label {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
}

.countdown-separator {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent-500);
}

.flash-deals .btn--outline {
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--color-text-inverse);
}

.flash-deals .btn--outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-text-inverse);
}

.flash-deals__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-6);
}

/* ===== Testimonials 客户评价 ===== */
.testimonials__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-6);
}

.testimonial-card {
    background: var(--color-bg-primary);
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
    transition: all var(--transition-normal);
}

.testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

.testimonial-card__rating {
    display: flex;
    gap: var(--spacing-1);
    margin-bottom: var(--spacing-4);
    color: #ffc107;
}

.testimonial-card__text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-6);
    font-style: italic;
}

.testimonial-card__author {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.testimonial-card__avatar {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-700));
    border-radius: var(--radius-full);
    color: var(--color-text-inverse);
    font-size: var(--font-size-lg);
}

.testimonial-card__info h4 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-1);
}

.testimonial-card__info span {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* ===== 客户评价 Testimonials 轮播 ===== */
.testimonials__carousel {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.testimonials__track-container {
    flex: 1;
    overflow: hidden;
}

.testimonials__track {
    display: flex;
    gap: var(--spacing-6);
    /* 移除 transition，改用 animation */
}

/* 跑马灯动画 - 移动端/桌面端通用 */
@keyframes marquee {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(calc(-50% - var(--spacing-6) / 2));
    }
}

.testimonials__track--marquee {
    animation: marquee 40s linear infinite;
    /* 鼠标悬停暂停 */
}

.testimonials__track--marquee:hover {
    animation-play-state: paused;
}

.testimonials__nav {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-primary);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    z-index: 10;
}

.testimonials__nav:hover {
    background: var(--color-primary-500);
    border-color: var(--color-primary-500);
    color: var(--color-text-inverse);
    transform: scale(1.1);
}

/* 评论卡片 */
.testimonial-card {
    flex: 0 0 calc(25% - var(--spacing-6) * 3 / 4);
    min-width: 280px;
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* 用户信息头部 */
.testimonial-card__header {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.testimonial-card__avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    overflow: hidden;
    background: var(--color-gray-100);
    flex-shrink: 0;
}

.testimonial-card__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-card__avatar i {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-400);
    font-size: var(--font-size-xl);
}

.testimonial-card__user {
    flex: 1;
}

.testimonial-card__name {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-1);
}

.testimonial-card__location {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* 星级评分 */
.testimonial-card__rating {
    display: flex;
    gap: var(--spacing-1);
    margin-bottom: var(--spacing-4);
}

.testimonial-card__rating i {
    color: #ffc107;
    font-size: var(--font-size-sm);
}

/* 评论内容 */
.testimonial-card__content {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-4);
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 产品图片轮播 */
.testimonial-card__images {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.testimonial-card__image-track {
    display: flex;
    width: 100%;
    transition: transform 0.3s ease;
    /* 移除 overflow: hidden 以允许滑动，由父级裁剪 */
    /* overflow: hidden; */
    /* border-radius: var(--radius-lg); */
    /* aspect-ratio: 4/3; */
    background: var(--color-gray-100);
}

.testimonial-card__image-track img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    flex-shrink: 0;
    object-fit: cover;
    flex-shrink: 0;
}

.testimonial-card__image-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2);
    margin-top: var(--spacing-3);
}

.testimonial-card__image-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--color-gray-300);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    padding: 0;
}

.testimonial-card__image-dot--active {
    background: var(--color-primary-500);
    transform: scale(1.2);
}

/* ===== 回到顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-8);
    right: var(--spacing-8);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-500);
    color: var(--color-text-inverse);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: var(--z-fixed);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--color-primary-600);
    transform: translateY(-4px);
}

/* ===== Flash Deals 响应式 ===== */


@media (max-width: 992px) {
    .flash-deals__grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .testimonial-card {
        flex: 0 0 calc(50% - var(--spacing-6) / 2);
        min-width: 260px;
    }
}

@media (max-width: 768px) {
    .flash-deals__header {
        flex-direction: column;
        align-items: flex-start;
    }

    .flash-deals__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .testimonials__nav {
        display: none;
    }

    .testimonial-card {
        flex: 0 0 calc(100% - var(--spacing-4));
        min-width: 240px;
    }

    .testimonials__track {
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .testimonials__track::-webkit-scrollbar {
        display: none;
    }

    .testimonial-card {
        scroll-snap-align: start;
    }
}

@media (max-width: 576px) {
    .flash-deals__grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 移动端侧边菜单 ===== */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-modal);
    visibility: hidden;
    opacity: 0;
    transition: visibility 0.3s, opacity 0.3s;
}

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

.mobile-menu__overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.mobile-menu__content {
    position: absolute;
    top: 0;
    right: 0;
    width: 280px;
    max-width: 85%;
    height: 100%;
    background: var(--color-bg-primary);
    box-shadow: var(--shadow-xl);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

.mobile-menu.active .mobile-menu__content {
    transform: translateX(0);
}

.mobile-menu__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-200);
}

.mobile-menu__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.mobile-menu__logo img {
    height: 32px;
    width: auto;
}

.mobile-menu__logo span {
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.mobile-menu__close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.mobile-menu__close:hover {
    background: var(--color-gray-100);
    color: var(--color-text-primary);
}

.mobile-menu__nav {
    flex: 1;
    padding: var(--spacing-4) 0;
    overflow-y: auto;
}

.mobile-menu__link {
    display: block;
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.mobile-menu__link:hover {
    background: var(--color-gray-50);
    color: var(--color-primary-500);
}

.mobile-menu__actions {
    padding: var(--spacing-6);
    border-top: 1px solid var(--color-gray-200);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

/* ===== WhatsApp 悬浮按钮 ===== */
.whatsapp-float {
    position: fixed;
    bottom: var(--spacing-6);
    right: var(--spacing-6);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #25d366;
    border-radius: var(--radius-full);
    color: white;
    font-size: 28px;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
    z-index: var(--z-fixed);
    transition: all var(--transition-normal);
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
}

@media (max-width: 768px) {
    .whatsapp-float {
        width: 50px;
        height: 50px;
        font-size: 24px;
        bottom: var(--spacing-4);
        right: var(--spacing-4);
    }
}

/* ===== Search Modal ===== */
.search-modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    z-index: var(--z-modal);
}

.search-modal.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.search-modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(2px);
}

.search-modal__dialog {
    position: relative;
    z-index: 1;
    width: min(560px, 92vw);
    background: var(--color-bg-primary);
    border-radius: 16px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
    padding: var(--spacing-6);
}

.search-modal__form {
    display: flex;
    gap: var(--spacing-3);
    align-items: center;
}

.search-modal__input {
    flex: 1;
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-gray-200);
    font-size: var(--font-size-base);
    outline: none;
}

.search-modal__input:focus {
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.15);
}

.search-modal__submit {
    min-width: 140px;
}

@media (max-width: 576px) {
    .search-modal__form {
        flex-direction: column;
        align-items: stretch;
    }

    .search-modal__submit {
        width: 100%;
    }
}

/* ===== Mobile Touch Target Optimization ===== */
/* Ensure all interactive elements meet 44px minimum touch target */
@media (max-width: 768px) {

    /* Small buttons need larger tap area on mobile */
    .btn--sm {
        min-height: 44px;
        padding: var(--spacing-3) var(--spacing-4);
    }

    /* Navigation action buttons */
    .nav__action-btn {
        min-width: 44px;
        min-height: 44px;
    }

    /* Form inputs */
    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="password"],
    input[type="number"],
    input[type="search"],
    select,
    textarea {
        min-height: 44px;
        font-size: 16px;
        /* Prevents iOS zoom on focus */
    }

    /* Links in navigation */
    .nav__link,
    .mobile-menu a {
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    /* Touch-action for smoother interactions */
    button,
    a,
    input,
    select,
    textarea {
        touch-action: manipulation;
    }
}

/* ===== Ultra-small devices (320px - 400px) ===== */
@media (max-width: 400px) {

    /* Tighter container padding */
    .container {
        padding: 0 var(--spacing-4);
    }

    /* Smaller section padding */
    .section {
        padding: var(--spacing-12) 0;
    }

    /* Reduce heading sizes */
    .heading-1,
    .section-header__title {
        font-size: var(--font-size-2xl);
    }

    .heading-2 {
        font-size: var(--font-size-xl);
    }

    .heading-3 {
        font-size: var(--font-size-lg);
    }

    /* Product grid single column */
    .products-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-4);
    }

    /* Smaller product cards */
    .product-card__content {
        padding: var(--spacing-3);
    }

    /* Full-width buttons */
    .btn {
        width: 100%;
        justify-content: center;
    }

    /* Hero text smaller */
    .hero__title {
        font-size: var(--font-size-2xl);
    }

    .hero__subtitle {
        font-size: var(--font-size-sm);
    }

    /* Footer compacted */
    .footer__grid {
        gap: var(--spacing-6);
    }

    /* Hide less critical elements */
    .top-bar__promo,
    .nav__search {
        display: none;
    }
}

/* ===== Landscape orientation adjustments ===== */
@media (max-height: 500px) and (orientation: landscape) {

    /* Reduce vertical spacing for landscape mobile */
    .section {
        padding: var(--spacing-8) 0;
    }

    /* Compact header */
    .header {
        padding: var(--spacing-2) 0;
    }

    /* Hero fits in viewport */
    .hero {
        min-height: auto;
        padding: var(--spacing-8) 0;
    }

    .hero__content {
        max-width: 60%;
    }

    /* Hide decorative elements */
    .hero__bg-pattern {
        display: none;
    }

    /* Scrollable mobile menu */
    .mobile-menu__content {
        max-height: calc(100vh - 60px);
        overflow-y: auto;
    }
}