/* 苏州铂金婚礼官网 - 主样式表 */
/* 黑白灰极简杂志风格 */

/* ========== CSS变量 ========== */
:root {
    /* 颜色 */
    --bg-color: #fcfcfc;
    --bg-white: #ffffff;
    --text-primary: #000000;
    --text-secondary: #666666;
    --text-muted: #999999;
    --border-color: #e7e7e7;
    --border-dark: #000000;
    
    /* 字体 */
    --font-serif: "Songti SC", "SimSun", "STSong", serif;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    
    /* 尺寸 */
    --header-height: 70px;
    --container-width: 1200px;
    --spacing-sm: 10px;
    --spacing-md: 20px;
    --spacing-lg: 40px;
    --spacing-xl: 60px;
}

/* ========== 重置样式 ========== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

a:hover {
    opacity: 0.7;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    /* 防止图片拉伸变形 */
    object-fit: cover;
}

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

ul, ol {
    list-style: none;
}

/* ========== 通用容器 ========== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========== 头部导航 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-dark);
    z-index: 1000;
    transition: transform 0.3s ease;
}

.header.hidden {
    transform: translateY(-100%);
}

.header-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: normal;
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-item {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s ease;
}

.nav-item:hover,
.nav-item.active {
    opacity: 1;
    border-bottom-color: var(--text-primary);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========== 主内容区 ========== */
.main-content {
    padding-top: var(--header-height);
}

/* ========== Banner轮播 ========== */
.banner-section {
    width: 100%;
    position: relative;
    overflow: hidden;
}

.banner-swiper {
    width: 100%;
    position: relative;
    overflow: hidden;
}

.swiper-wrapper {
    display: flex;
    transition: transform 0.8s ease;
}

.banner-slide {
    width: 100%;
    min-width: 100%;
    position: relative;
    flex-shrink: 0;
}

.banner-image {
    width: 100%;
    height: 500px;
    display: block;
    /* 裁剪图片以填满容器，保持比例 */
    object-fit: cover;
    object-position: center;
}

.banner-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 60px 40px;
    background: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
    color: #fff;
}

.banner-desc {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 4px;
    opacity: 0.9;
    margin-bottom: 10px;
}

.banner-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: normal;
    line-height: 1.2;
}

.swiper-pagination {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.swiper-dot {
    width: 8px;
    height: 8px;
    background: rgba(255,255,255,0.5);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.swiper-dot.active {
    background: #fff;
    transform: scale(1.2);
}

/* ========== Slogan区域 ========== */
.slogan-section {
    padding: var(--spacing-xl) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: 30px;
    max-width: var(--container-width);
    margin: 0 auto;
}

.slogan-text {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-style: italic;
    letter-spacing: 2px;
    white-space: nowrap;
}

.slogan-divider {
    flex: 1;
    height: 1px;
    background: var(--text-primary);
}

/* ========== 服务区域 ========== */
.service-section {
    padding: 0 var(--spacing-lg) var(--spacing-xl);
    max-width: var(--container-width);
    margin: 0 auto;
}

.section-title {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 4px;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--text-primary);
    display: inline-block;
}

.service-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.service-card {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 15px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.service-card:hover {
    border-color: var(--text-primary);
    background: var(--bg-color);
}

.service-icon {
    font-size: 1.75rem;
}

.service-name {
    font-family: var(--font-serif);
    font-size: 1rem;
}

/* 快捷操作按钮 - 2个按钮并排 */
.quick-actions {
    display: flex;
    gap: 0;
    border: 2px solid var(--text-primary);
    margin-top: var(--spacing-lg);
}

.action-btn {
    flex: 1;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 1px;
    background: var(--bg-white);
    border: none;
    border-right: 1px solid var(--text-primary);
    transition: all 0.3s ease;
}

.action-btn:last-child {
    border-right: none;
}

.action-btn:hover {
    opacity: 1;
    background: var(--bg-color);
}

.action-btn .icon {
    width: 18px;
    height: 18px;
}

.action-btn-primary {
    background: var(--text-primary);
    color: var(--bg-white);
}

.action-btn-primary:hover {
    background: #333;
}

/* ========== 案例区域 ========== */
.case-section {
    padding: 0 var(--spacing-lg) var(--spacing-xl);
    max-width: var(--container-width);
    margin: 0 auto;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--text-primary);
}

.section-header .section-title {
    margin: 0;
    padding: 0;
    border: none;
}

.section-more {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-decoration: underline;
}

.case-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.case-card {
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.case-card:hover {
    opacity: 0.9;
}

.case-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    margin-bottom: var(--spacing-md);
    /* 确保图片不会超出容器 */
    max-width: 100%;
}

.case-info {
    padding: 0;
}

.case-name {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    margin-bottom: 10px;
}

.case-desc {
    font-family: var(--font-serif);
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.case-tags {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.case-tag {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.case-tag::before {
    content: "#";
    margin-right: 2px;
}

/* ========== 页脚 ========== */
.footer {
    background: var(--text-primary);
    color: var(--bg-white);
    padding: var(--spacing-xl) var(--spacing-lg);
}

.footer-content {
    max-width: var(--container-width);
    margin: 0 auto;
    text-align: center;
}

.footer-info {
    margin-bottom: var(--spacing-lg);
}

.footer-name {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.footer-slogan {
    font-family: var(--font-serif);
    font-size: 0.875rem;
    font-style: italic;
    opacity: 0.8;
}

.footer-contact {
    margin-bottom: var(--spacing-lg);
}

.footer-contact p {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-bottom: 5px;
}

.footer-copyright {
    font-size: 0.75rem;
    opacity: 0.6;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255,255,255,0.2);
}

.footer-icp {
    display: block;
    font-size: 0.75rem;
    opacity: 0.6;
    margin-top: 10px;
    color: inherit;
    text-decoration: none;
}

.footer-icp:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* ========== 加载状态 ========== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border-color);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

.empty-state p {
    font-family: var(--font-serif);
    font-size: 1rem;
}