/* ========== 变量 ========== */
:root {
    --primary: #165DFF;
    --primary-light: #e8f0ff;
    --text-1: #1d2129;
    --text-2: #4e5969;
    --text-3: #86909c;
    --bg-1: #ffffff;
    --bg-2: #f7f8fa;
    --border: #e5e6eb;
}

/* ========== 重置 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
a, a:link, a:visited, a:hover, a:active {
    text-decoration: none !important;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-1);
    background: var(--bg-1);
    line-height: 1.6;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== Header ========== */
.header {
    background: #fff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    padding: 0 24px;
}

.header .logo a {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header .menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.header .menu a {
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    color: var(--text-2);
    transition: all 0.2s;
}

.header .menu a:hover,
.header .menu a.active {
    color: var(--primary);
    background: var(--primary-light);
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-2);
}
/* 菜单项包装 */
/* 菜单项包装 */
.menu-item {
    position: relative;
}

.menu-item > a {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* 子菜单 - 下拉 */
.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 150px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    padding: 6px 0;
    z-index: 200;
    flex-direction: column;
}

.has-submenu:hover .submenu {
    display: flex;
}

.submenu a {
    display: block;
    padding: 10px 16px;
    font-size: 14px;
    color: var(--text-2);
    white-space: nowrap;
    text-decoration: none;
}

.submenu a:hover {
    background: var(--bg-2);
    color: var(--primary);
}

/* 移动端子菜单 */
@media (max-width: 768px) {
    .submenu {
        position: static;
        border: none;
        box-shadow: none;
        padding-left: 20px;
        display: none;
    }
    
    .has-submenu.open .submenu {
        display: block;
    }
    
    .submenu a {
        padding: 8px 16px;
    }
}
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-2);
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    .menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--border);
        padding: 12px 0;
        z-index: 99;
    }
    .menu.open {
        display: flex;
    }
}
/* ========== Hero ========== */
.hero {
    background: linear-gradient(135deg, #e0f0ff 0%, #b8d9ff 50%, #d4e6ff 100%);
    padding: 80px 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.hero-content {
    max-width: 500px;
}

.hero-content h1 {
    font-size: 42px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 16px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 16px;
    color: var(--text-2);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image img {
    max-width: 520px;
    width: 100%;
    height: 100%;
    opacity: 0.85;
}

/* ========== Buttons ========== */
.btn-primary-lg {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: #fff;
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    transition: opacity 0.3s;
}

.btn-primary-lg:hover {
    opacity: 0.9;
    color: #fff;
}

.btn-outline-lg {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-outline-lg:hover {
    background: var(--primary);
    color: #fff;
}

/* ========== Sections ========== */
.section {
    padding: 80px 24px;
    text-align: center;
}

.section-alt {
    background: var(--bg-2);
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 15px;
    color: var(--text-3);
    margin-bottom: 50px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ========== Product Grid ========== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.product-block {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px 24px;
    text-align: left;
    transition: all 0.3s;
    cursor: pointer;
}

.product-block:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-4px);
}

.product-block-icon {
    margin-bottom: 16px;
}

.product-block-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 8px;
}

.product-block-desc {
    font-size: 14px;
    color: var(--text-3);
    line-height: 1.6;
}

/* ========== Features Grid ========== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    max-width: 900px;
    margin: 0 auto;
}

.feature-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px 20px;
    font-size: 14px;
    color: var(--text-2);
    text-align: left;
    display: flex;
    align-items: center;
    gap: 8px;
}

.feature-item::before {
    content: "✓";
    color: var(--primary);
    font-weight: 700;
    flex-shrink: 0;
}

/* ========== Stats Grid ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
}

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

.stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 14px;
    color: var(--text-3);
    margin-top: 4px;
}

/* ========== 通用卡片 ========== */
.card {
    background: #fff;
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 24px;
}

/* ========== 表单 ========== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-1);
}

.form-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s;
}

.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(22, 93, 255, 0.1);
}

select.form-input {
    appearance: auto;
}

textarea.form-input {
    resize: vertical;
}

/* ========== 通用按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    opacity: 0.9;
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

.btn-lg {
    padding: 14px 36px;
    font-size: 16px;
}

/* ========== 商品卡片（用户端商品列表用） ========== */
.product-card {
    background: #fff;
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: all 0.3s;
}

.product-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-4px);
}

.product-card-image {
    height: 160px;
    background: linear-gradient(135deg, #f0f5ff, #e8ecf1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-card-body {
    padding: 20px;
}

.product-card-body h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.product-card-body p {
    font-size: 13px;
    color: var(--text-3);
    margin-bottom: 12px;
}

.product-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    background: var(--bg-2);
}

.product-price {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

/* ========== 提示框 ========== */
.alert {
    padding: 10px 16px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-error {
    background: #fff2f0;
    border: 1px solid #ffccc7;
    color: #cf1322;
}

.alert-success {
    background: #f6ffed;
    border: 1px solid #b7eb8f;
    color: #389e0d;
}

/* ========== 表格 ========== */
table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background: var(--bg-2);
    padding: 14px 16px;
    font-size: 13px;
    color: var(--text-3);
    font-weight: 500;
    text-align: left;
}

td {
    padding: 12px 16px;
    font-size: 14px;
    border-top: 1px solid #f0f0f0;
}

/* ========== 面包屑 ========== */
.breadcrumb {
    font-size: 13px;
    color: var(--text-3);
    margin-bottom: 24px;
}

.breadcrumb a {
    color: var(--primary);
}

.breadcrumb span {
    margin: 0 8px;
}

/* ========== 移动端响应式 ========== */
@media (max-width: 768px) {
    .menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--border);
        padding: 12px 0;
        z-index: 99;
    }

    .menu.open {
        display: flex;
    }

    .menu a {
        padding: 12px 24px;
        border-radius: 0;
    }

    .menu-toggle {
        display: block;
    }

    .hero {
        flex-direction: column;
        text-align: center;
        padding: 50px 24px;
        gap: 30px;
    }

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

    .hero-content h1 {
        font-size: 28px;
    }

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

    .hero-image img {
        max-width: 600px;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .stat-value {
        font-size: 28px;
    }

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

    .section-title {
        font-size: 24px;
    }
}