/* ============================================
   桐庐高端租房 - 全局样式
   设计参考: Awehome(集好家) 风格
   本地化: 浙江桐庐租房平台
   ============================================ */

/* --- CSS 变量(设计令牌) --- */
:root {
    /* 品牌色 */
    --primary: #2d6ce0;
    --primary-hover: #1a56b8;
    --primary-light: #e8f0fe;
    --primary-lighter: #f0f5ff;

    /* 强调色(价格/CTA) */
    --accent: #ff6d00;
    --accent-hover: #e56200;
    --accent-light: #fff3e0;

    /* 功能色 */
    --success: #00b578;
    --warning: #faad14;
    --danger: #f5222d;
    --info: #1890ff;

    /* 文字色 */
    --text-primary: #1a1a2e;
    --text-secondary: #5a5a7a;
    --text-light: #8c8ca1;
    --text-placeholder: #b0b0c3;

    /* 背景色 */
    --bg-body: #f5f6fa;
    --bg-white: #ffffff;
    --bg-gray: #f0f1f5;
    --bg-dark: #1a1a2e;

    /* 边框色 */
    --border-light: #e8e8ef;
    --border-normal: #d9d9e3;
    --border-dark: #b0b0c3;

    /* 阴影 */
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
    --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
    --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.1);

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* 间距 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* 布局 */
    --container-width: 1200px;
    --nav-height: 64px;
    --nav-height-scroll: 56px;

    /* 字体 */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 28px;
    --font-size-4xl: 36px;

    /* 动画 */
    --transition-fast: 0.15s ease;
    --transition: 0.25s ease;
    --transition-slow: 0.4s ease;
}

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

html {
    font-size: 14px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background: var(--bg-body);
    line-height: 1.6;
    min-height: 100vh;
}

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

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

ul, ol { list-style: none; }

input, button, select, textarea {
    font-family: inherit;
    font-size: inherit;
    outline: none;
    border: none;
    background: none;
}

button { cursor: pointer; }

/* --- 容器 --- */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* --- 通用组件 --- */

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 0 24px;
    height: 40px;
    font-size: var(--font-size-base);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition);
    white-space: nowrap;
    cursor: pointer;
    border: 1px solid transparent;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(45,108,224,0.3);
}

.btn-accent {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
.btn-accent:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    box-shadow: 0 4px 12px rgba(255,109,0,0.3);
}

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

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}
.btn-ghost:hover {
    background: var(--bg-gray);
    color: var(--text-primary);
}

.btn-white {
    background: #fff;
    color: var(--primary);
}
.btn-white:hover {
    background: #f5f5f5;
    box-shadow: var(--shadow-sm);
}

.btn-lg { height: 48px; padding: 0 32px; font-size: var(--font-size-md); border-radius: var(--radius-lg); }
.btn-sm { height: 32px; padding: 0 16px; font-size: var(--font-size-sm); border-radius: var(--radius-sm); }
.btn-block { display: flex; width: 100%; }

/* 标签 */
.tag {
    display: inline-block;
    padding: 2px 8px;
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
    line-height: 1.6;
    white-space: nowrap;
}
.tag-primary { background: var(--primary-light); color: var(--primary); }
.tag-accent { background: var(--accent-light); color: var(--accent); }
.tag-success { background: #e6f7ef; color: var(--success); }
.tag-gray { background: var(--bg-gray); color: var(--text-secondary); }

/* 分区标题 */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}
.section-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.section-header .more-link {
    font-size: var(--font-size-base);
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color var(--transition);
}
.section-header .more-link:hover { color: var(--primary); }

/* 区块 */
.section {
    padding: var(--space-3xl) 0;
}

/* 面包屑 */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 0;
    font-size: var(--font-size-sm);
    color: var(--text-light);
}
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--text-placeholder); }

/* 空状态 */
.empty-state {
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
}
.empty-state .empty-icon { font-size: 64px; margin-bottom: 16px; }
.empty-state p { color: var(--text-light); font-size: var(--font-size-md); }
.empty-state a { color: var(--primary); text-decoration: underline; }

/* 工具类 */
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }
.text-light { color: var(--text-light); }
.fw-500 { font-weight: 500; }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }

/* ============================================
   导航栏 - 参考 Awehome 风格
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: all var(--transition);
}
.navbar.scrolled {
    height: var(--nav-height-scroll);
    box-shadow: var(--shadow-sm);
}
.navbar .container {
    display: flex;
    align-items: center;
    height: 100%;
    gap: 0;
}

.navbar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    margin-right: 40px;
}
.navbar-logo .logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), #4a90d9);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    font-weight: 700;
}
.navbar-logo .logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}
.navbar-logo .logo-text span {
    color: var(--primary);
}

/* 导航链接 */
.navbar-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
}
.navbar-nav a {
    display: flex;
    align-items: center;
    height: var(--nav-height);
    padding: 0 16px;
    font-size: var(--font-size-base);
    color: var(--text-primary);
    font-weight: 500;
    position: relative;
    transition: color var(--transition);
}
.navbar-nav a:hover,
.navbar-nav a.active {
    color: var(--primary);
}
.navbar-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 16px;
    right: 16px;
    height: 3px;
    background: var(--primary);
    border-radius: 3px 3px 0 0;
}

/* 右侧操作区 */
.navbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
    flex-shrink: 0;
}
.navbar-actions .nav-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}
.navbar-actions .nav-btn:hover {
    background: var(--bg-gray);
    color: var(--text-primary);
}
.navbar-actions .user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}
.navbar-actions .user-avatar:hover {
    background: var(--primary);
    color: #fff;
}

/* ============================================
   Hero/Banner 区域 - 轮播式搜索
   ============================================ */
.hero {
    position: relative;
    margin-top: var(--nav-height);
    background: linear-gradient(135deg, #1a3a6e 0%, #2d6ce0 50%, #4a90d9 100%);
    overflow: hidden;
    min-height: 460px;
    display: flex;
    align-items: center;
}
/* 装饰元素 */
.hero::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -150px;
    left: -80px;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255,255,255,0.03);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 60px 0 50px;
    width: 100%;
}
.hero-content h1 {
    font-size: 42px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.hero-content .hero-sub {
    font-size: 18px;
    color: rgba(255,255,255,0.85);
    margin-bottom: 36px;
    letter-spacing: 1px;
}

/* 搜索框 */
.search-box {
    display: flex;
    align-items: center;
    max-width: 720px;
    margin: 0 auto 20px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    height: 52px;
}
.search-box .search-type {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 16px;
    font-size: var(--font-size-base);
    color: var(--text-primary);
    font-weight: 500;
    border-right: 1px solid var(--border-light);
    white-space: nowrap;
    cursor: pointer;
}
.search-box .search-input {
    flex: 1;
    height: 100%;
    padding: 0 16px;
    font-size: var(--font-size-base);
    color: var(--text-primary);
}
.search-box .search-input::placeholder { color: var(--text-placeholder); }
.search-box .search-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    height: 100%;
    padding: 0 28px;
    background: var(--primary);
    color: #fff;
    font-size: var(--font-size-base);
    font-weight: 500;
    transition: background var(--transition);
    white-space: nowrap;
}
.search-box .search-btn:hover { background: var(--primary-hover); }

/* 热门标签 */
.hot-tags {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}
.hot-tags .tag {
    display: flex;
    align-items: center;
    padding: 6px 14px;
    font-size: var(--font-size-sm);
    color: rgba(255,255,255,0.9);
    background: rgba(255,255,255,0.15);
    border-radius: var(--radius-full);
    backdrop-filter: blur(4px);
    cursor: pointer;
    transition: all var(--transition);
}
.hot-tags .tag:hover {
    background: rgba(255,255,255,0.25);
    color: #fff;
}

/* 数据统计 */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.15);
}
.hero-stats .stat-item { text-align: center; }
.hero-stats .stat-num {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
}
.hero-stats .stat-label {
    font-size: var(--font-size-sm);
    color: rgba(255,255,255,0.7);
    margin-top: 4px;
}

/* ============================================
   区域/城市卡片网格
   ============================================ */
.city-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.city-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 100px;
    cursor: pointer;
    transition: all var(--transition);
}
.city-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.city-card .city-bg {
    position: absolute;
    inset: 0;
    transition: transform var(--transition-slow);
}
.city-card:hover .city-bg { transform: scale(1.05); }
.city-card .city-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1;
    padding: 12px;
}
.city-card .city-name {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: #fff;
}
.city-card .city-count {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,0.8);
    margin-top: 2px;
}

/* ============================================
   房源卡片网格 - 核心组件
   ============================================ */
.house-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
@media (max-width: 1024px) {
    .house-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
    .house-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .hero-content h1 { font-size: 28px; }
    .hero-stats { gap: 24px; }
    .hero-stats .stat-num { font-size: 20px; }
    .city-grid { grid-template-columns: repeat(2, 1fr); }
    .navbar-nav { display: none; }
}

.house-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
    display: block;
    cursor: pointer;
    border: 1px solid var(--border-light);
}
.house-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-4px);
    border-color: transparent;
}

/* 卡片图片区 */
.house-card .card-img {
    position: relative;
    padding-top: 66.67%; /* 3:2 比例 */
    background: var(--bg-gray);
    overflow: hidden;
}
.house-card .card-img img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.house-card:hover .card-img img {
    transform: scale(1.05);
}
.house-card .card-img .no-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    background: linear-gradient(135deg, var(--bg-gray), #e2e5ea);
}
.house-card .card-tag {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 3px 8px;
    font-size: 11px;
    font-weight: 500;
    color: #fff;
    background: rgba(0,0,0,0.5);
    border-radius: var(--radius-sm);
    backdrop-filter: blur(4px);
    z-index: 1;
}
.house-card .card-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 3px 8px;
    font-size: 11px;
    font-weight: 500;
    color: #fff;
    background: var(--accent);
    border-radius: var(--radius-sm);
    z-index: 1;
}
.house-card .card-img-count {
    position: absolute;
    bottom: 8px;
    right: 8px;
    padding: 2px 8px;
    font-size: 11px;
    color: #fff;
    background: rgba(0,0,0,0.45);
    border-radius: var(--radius-full);
    backdrop-filter: blur(4px);
    z-index: 1;
}

/* 卡片信息区 */
.house-card .card-body {
    padding: 14px 16px 16px;
}
.house-card .card-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 6px;
    transition: color var(--transition);
}
.house-card:hover .card-title { color: var(--primary); }

.house-card .card-location {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 户型参数 */
.house-card .card-specs {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}
.house-card .card-specs span {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    padding: 2px 6px;
    background: var(--bg-gray);
    border-radius: var(--radius-sm);
}

/* 标签 */
.house-card .card-tags {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}
.house-card .card-tags span {
    font-size: 11px;
    color: var(--text-light);
    padding: 1px 6px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
}

/* 卡片底栏(价格) */
.house-card .card-footer {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    padding-top: 10px;
    border-top: 1px solid var(--border-light);
}
.house-card .card-price .amount {
    font-size: 22px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}
.house-card .card-price .unit {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    font-weight: 400;
    margin-left: 2px;
}
.house-card .card-action {
    font-size: var(--font-size-xs);
    color: var(--text-light);
}

/* ============================================
   筛选栏
   ============================================ */
.filter-bar {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 16px 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-xs);
    border: 1px solid var(--border-light);
}
.filter-row {
    display: flex;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-light);
}
.filter-row:last-child { border-bottom: none; }
.filter-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 70px;
    flex-shrink: 0;
}
.filter-options {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}
.filter-options a {
    padding: 6px 14px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    transition: all var(--transition);
}
.filter-options a:hover { color: var(--primary); background: var(--primary-lighter); }
.filter-options a.active {
    color: var(--primary);
    background: var(--primary-light);
    font-weight: 500;
}
.filter-input {
    width: 80px;
    height: 32px;
    padding: 0 10px;
    border: 1px solid var(--border-normal);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    text-align: center;
    transition: border-color var(--transition);
}
.filter-input:focus { border-color: var(--primary); }

/* ============================================
   列表工具栏
   ============================================ */
.list-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.result-count {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}
.result-count strong {
    color: var(--text-primary);
    font-weight: 700;
}
.sort-options {
    display: flex;
    gap: 4px;
}
.sort-options a {
    padding: 6px 12px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.sort-options a:hover { color: var(--primary); }
.sort-options a.active {
    color: var(--primary);
    background: var(--primary-light);
    font-weight: 500;
}

/* ============================================
   分页
   ============================================ */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 32px 0;
}
.pagination a, .pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: all var(--transition);
    background: var(--bg-white);
}
.pagination a:hover { color: var(--primary); border-color: var(--primary); }
.pagination a.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.pagination .prev, .pagination .next { font-weight: 500; }

/* ============================================
   平台优势
   ============================================ */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.advantage-item {
    text-align: center;
    padding: 32px 20px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
    border: 1px solid var(--border-light);
}
.advantage-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
    border-color: transparent;
}
.advantage-item .adv-icon {
    font-size: 36px;
    margin-bottom: 16px;
}
.advantage-item h3 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: 8px;
}
.advantage-item p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   步骤流程
   ============================================ */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    position: relative;
}
.steps-grid::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 16%;
    right: 16%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0.2;
}
.step-item {
    text-align: center;
    position: relative;
}
.step-num {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--primary), #4a90d9);
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
}
.step-item h3 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: 8px;
}
.step-item p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.6;
    padding: 0 12px;
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 48px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}
.footer-brand .footer-logo .logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), #4a90d9);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
}
.footer-brand .footer-logo .logo-text {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
}
.footer-brand .footer-desc {
    font-size: var(--font-size-sm);
    line-height: 1.8;
    margin-bottom: 16px;
}
.footer-brand .footer-contact {
    font-size: var(--font-size-sm);
    line-height: 2;
}
.footer-col h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}
.footer-col a {
    display: block;
    font-size: var(--font-size-sm);
    color: rgba(255,255,255,0.6);
    padding: 4px 0;
    transition: color var(--transition);
}
.footer-col a:hover { color: #fff; }

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,0.4);
}

/* ============================================
   登录弹窗
   ============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px);
}
.modal-overlay.show { display: flex; }

.modal {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    width: 420px;
    max-width: 90vw;
    box-shadow: var(--shadow-xl);
    animation: modalIn 0.3s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: translateY(20px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 0;
}
.modal-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
}
.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--text-light);
    border-radius: 50%;
    transition: all var(--transition);
}
.modal-close:hover { background: var(--bg-gray); color: var(--text-primary); }

.modal-body { padding: 24px; }
.modal-footer { padding: 0 24px 24px; }

.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.form-group .form-input {
    width: 100%;
    height: 44px;
    padding: 0 14px;
    border: 1px solid var(--border-normal);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group .form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(45,108,224,0.1);
}
.form-group .form-input::placeholder { color: var(--text-placeholder); }
.form-group .form-hint {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    margin-top: 4px;
}
.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }

/* 页面内容区占位(nav高度) */
.page-body { padding-top: var(--nav-height); }