/* ===== 华盛证件制作中心 - 现代商务蓝主题 ===== */
/* 主题色：#1a73e8 主色 / #e8f0fe 辅助 / #ff6b35 强调 */

:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #4a90e8;
    --secondary: #e8f0fe;
    --accent: #ff6b35;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --bg-white: #ffffff;
    --bg-light: #f5f7fb;
    --border: #e5e7eb;
    --shadow: 0 4px 16px rgba(26, 115, 232, 0.08);
    --shadow-hover: 0 8px 24px rgba(26, 115, 232, 0.16);
    --radius: 14px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', '微软雅黑', 'PingFang SC', Helvetica, Arial, sans-serif;
    color: var(--text-dark);
    background: var(--bg-white);
    line-height: 1.7;
    font-size: 15px;
    padding-bottom: 70px;
}

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

a:hover {
    color: var(--accent);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 顶部栏 ===== */
.topbar {
    background: var(--primary-dark);
    color: #fff;
    font-size: 13px;
    padding: 8px 0;
}

.topbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.topbar a {
    color: #fff;
    opacity: 0.9;
}

.topbar a:hover {
    opacity: 1;
    color: var(--accent);
}

.topbar .top-contact span {
    margin-right: 18px;
}

.topbar .top-contact span::before {
    content: '▸ ';
    color: var(--accent);
}

/* ===== 导航栏 ===== */
.header {
    background: #fff;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

.logo .logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 22px;
    font-weight: 700;
    box-shadow: 0 4px 10px rgba(26, 115, 232, 0.3);
}

.logo .logo-text small {
    display: block;
    font-size: 11px;
    font-weight: 400;
    color: var(--text-gray);
    letter-spacing: 1px;
}

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

.nav a {
    color: var(--text-dark);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    position: relative;
}

.nav a:hover,
.nav a.active {
    color: var(--primary);
    background: var(--secondary);
}

.nav a.active::after {
    content: '';
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 2px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}

/* 汉堡按钮 */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 22px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

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

.hamburger.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* ===== 轮播图 ===== */
.banner {
    position: relative;
    overflow: hidden;
    background: var(--primary-dark);
}

.banner-slider {
    display: flex;
    transition: transform 0.6s ease;
}

.banner-slide {
    min-width: 100%;
    height: 420px;
    position: relative;
    overflow: hidden;
}

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

.banner-slide::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(21, 87, 176, 0.85) 0%, rgba(26, 115, 232, 0.4) 50%, rgba(26, 115, 232, 0.1) 100%);
}

.banner-caption {
    position: absolute;
    left: 10%;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    color: #fff;
    max-width: 540px;
}

.banner-caption h2 {
    font-size: 34px;
    font-weight: 700;
    margin-bottom: 14px;
    line-height: 1.3;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.banner-caption p {
    font-size: 16px;
    opacity: 0.95;
    margin-bottom: 22px;
}

.banner-btn {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 15px;
    box-shadow: 0 6px 18px rgba(255, 107, 53, 0.4);
}

.banner-btn:hover {
    background: #ff5519;
    color: #fff;
    transform: translateY(-2px);
}

.banner-btn.prev,
.banner-btn.next {
    display: none;
}

.banner-btn-group {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    transform: translateY(-50%);
    z-index: 3;
}

.banner-btn-group button {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    border: 2px solid rgba(255, 255, 255, 0.6);
    color: #fff;
    font-size: 22px;
    cursor: pointer;
    backdrop-filter: blur(6px);
    transition: var(--transition);
}

.banner-btn-group button:hover {
    background: var(--accent);
    border-color: var(--accent);
}

.banner-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
    list-style: none;
}

.banner-dots li {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.banner-dots li.active {
    background: var(--accent);
    width: 32px;
    border-radius: 6px;
}

/* ===== 通用区块 ===== */
.section {
    padding: 60px 0;
}

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

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

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: 30px;
    color: var(--text-dark);
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 4px;
    margin: 10px auto 0;
}

.section-header p {
    color: var(--text-gray);
    font-size: 15px;
    max-width: 640px;
    margin: 0 auto;
}

/* ===== 面包屑 ===== */
.breadcrumb {
    background: var(--secondary);
    padding: 14px 0;
    font-size: 14px;
    color: var(--text-gray);
    border-bottom: 1px solid var(--border);
}

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

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

.breadcrumb .sep {
    margin: 0 8px;
    color: #cbd5e1;
}

.breadcrumb .current {
    color: var(--primary);
    font-weight: 500;
}

/* ===== 页面标题区 ===== */
.page-hero {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: #fff;
    padding: 50px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 30%, rgba(255, 107, 53, 0.25), transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.12), transparent 50%);
}

.page-hero .container {
    position: relative;
    z-index: 1;
}

.page-hero h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 10px;
}

.page-hero p {
    opacity: 0.9;
    font-size: 15px;
}

/* ===== 瀑布流布局 ===== */
.masonry {
    column-count: 3;
    column-gap: 24px;
}

.masonry-item {
    break-inside: avoid;
    margin-bottom: 24px;
    display: inline-block;
    width: 100%;
}

/* ===== 卡片 ===== */
.card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-6px);
    border-color: var(--primary-light);
}

.card-img {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: var(--secondary);
}

.card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.card:hover .card-img img {
    transform: scale(1.08);
}

.card-body {
    padding: 20px;
}

.card-body h3 {
    font-size: 18px;
    color: var(--text-dark);
    margin-bottom: 10px;
    font-weight: 600;
}

.card-body h3 a {
    color: inherit;
}

.card-body h3 a:hover {
    color: var(--primary);
}

.card-body p {
    color: var(--text-gray);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 12px;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-gray);
    border-top: 1px solid var(--border);
    padding-top: 12px;
    margin-top: 4px;
}

.card-meta .tag {
    background: var(--secondary);
    color: var(--primary);
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
}

.card-more {
    color: var(--primary);
    font-weight: 500;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.card-more::after {
    content: '→';
    transition: var(--transition);
}

.card-more:hover::after {
    transform: translateX(4px);
}

/* 卡片角标 */
.card-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--accent);
    color: #fff;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    z-index: 2;
    box-shadow: 0 4px 10px rgba(255, 107, 53, 0.4);
}

.card-img-wrap {
    position: relative;
}

/* ===== 栏目预览(首页) ===== */
.preview-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.preview-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 28px 22px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 4px solid var(--primary);
}

.preview-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-top-color: var(--accent);
}

.preview-card .icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: var(--secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: var(--primary);
}

.preview-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.preview-card p {
    color: var(--text-gray);
    font-size: 14px;
    margin-bottom: 14px;
}

.preview-card .more {
    color: var(--primary);
    font-weight: 500;
    font-size: 14px;
}

/* ===== 数据统计 ===== */
.stats {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: #fff;
    padding: 50px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.stats-item .num {
    font-size: 42px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1.2;
}

.stats-item .num small {
    font-size: 20px;
    color: #fff;
}

.stats-item .label {
    font-size: 15px;
    opacity: 0.9;
    margin-top: 6px;
}

/* ===== 关于我们 ===== */
.about-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.about-img img {
    width: 100%;
    height: 360px;
    object-fit: cover;
    border-radius: var(--radius);
    box-shadow: var(--shadow-hover);
}

.about-text h2 {
    font-size: 28px;
    margin-bottom: 18px;
    color: var(--text-dark);
}

.about-text p {
    color: var(--text-gray);
    margin-bottom: 16px;
    line-height: 1.9;
}

.about-list {
    list-style: none;
    margin: 20px 0;
}

.about-list li {
    padding: 8px 0 8px 28px;
    position: relative;
    color: var(--text-dark);
}

.about-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 8px;
    width: 20px;
    height: 20px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    text-align: center;
    line-height: 20px;
    font-size: 12px;
}

/* 优势列表 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-item {
    background: #fff;
    padding: 30px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-left: 4px solid var(--primary);
}

.feature-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.feature-item .feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin-bottom: 16px;
}

.feature-item h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.feature-item p {
    color: var(--text-gray);
    font-size: 14px;
}

/* ===== 文章页 ===== */
.article-wrap {
    max-width: 860px;
    margin: 0 auto;
}

.article-header {
    text-align: center;
    padding: 36px 0 24px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 30px;
}

.article-header h1 {
    font-size: 30px;
    color: var(--text-dark);
    margin-bottom: 14px;
    line-height: 1.4;
}

.article-meta {
    color: var(--text-gray);
    font-size: 14px;
}

.article-meta span {
    margin: 0 12px;
}

.article-meta span::before {
    content: '⏱ ';
    color: var(--primary);
}

.article-body {
    font-size: 16px;
    line-height: 2;
    color: #374151;
}

.article-body h2 {
    font-size: 22px;
    color: var(--primary-dark);
    margin: 30px 0 16px;
    padding-left: 14px;
    border-left: 4px solid var(--accent);
}

.article-body h3 {
    font-size: 18px;
    color: var(--text-dark);
    margin: 24px 0 12px;
}

.article-body p {
    margin-bottom: 18px;
}

.article-body ul,
.article-body ol {
    margin: 0 0 18px 22px;
}

.article-body li {
    margin-bottom: 8px;
}

.article-body img {
    width: 100%;
    border-radius: var(--radius);
    margin: 20px 0;
    box-shadow: var(--shadow);
}

.article-body blockquote {
    background: var(--secondary);
    border-left: 4px solid var(--primary);
    padding: 16px 22px;
    margin: 20px 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--primary-dark);
    font-style: italic;
}

.article-body strong {
    color: var(--primary-dark);
}

.article-footer {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.article-tags {
    margin: 20px 0;
}

.article-tags a {
    display: inline-block;
    background: var(--secondary);
    color: var(--primary);
    padding: 5px 14px;
    border-radius: 14px;
    font-size: 13px;
    margin-right: 8px;
}

.article-nav {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 24px;
}

.article-nav a {
    flex: 1;
    background: #fff;
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-size: 14px;
    color: var(--text-dark);
}

.article-nav a:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.article-nav a.next {
    text-align: right;
}

/* ===== 案例/产品卡片网格 ===== */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* ===== 评价 ===== */
.review-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    margin-bottom: 24px;
}

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

.review-card::before {
    content: '“';
    position: absolute;
    top: -8px;
    right: 22px;
    font-size: 70px;
    color: var(--secondary);
    font-family: Georgia, serif;
    line-height: 1;
}

.review-stars {
    color: #ffb400;
    margin-bottom: 12px;
    font-size: 16px;
}

.review-text {
    color: var(--text-dark);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 16px;
}

.review-user {
    display: flex;
    align-items: center;
    gap: 12px;
    border-top: 1px solid var(--border);
    padding-top: 14px;
}

.review-avatar {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 18px;
}

.review-user .name {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 15px;
}

.review-user .info {
    font-size: 12px;
    color: var(--text-gray);
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 860px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.faq-question {
    padding: 18px 24px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 16px;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary);
}

.faq-question .faq-icon {
    width: 26px;
    height: 26px;
    background: var(--secondary);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: var(--transition);
    flex-shrink: 0;
    margin-left: 14px;
}

.faq-item.active .faq-question .faq-icon {
    background: var(--accent);
    color: #fff;
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 24px;
    color: var(--text-gray);
    font-size: 14px;
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 24px 18px;
}

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.contact-info-card h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--primary-dark);
    padding-bottom: 14px;
    border-bottom: 2px solid var(--secondary);
}

.contact-list {
    list-style: none;
}

.contact-list li {
    display: flex;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px dashed var(--border);
    align-items: flex-start;
}

.contact-list li:last-child {
    border-bottom: none;
}

.contact-list .ic {
    width: 40px;
    height: 40px;
    background: var(--secondary);
    color: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.contact-list .lbl {
    font-size: 13px;
    color: var(--text-gray);
    margin-bottom: 2px;
}

.contact-list .val {
    font-size: 15px;
    color: var(--text-dark);
    font-weight: 500;
}

.contact-form {
    background: #fff;
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.contact-form h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--primary-dark);
}

.form-group {
    margin-bottom: 18px;
}

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    background: #fff;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.12);
}

.form-group textarea {
    resize: vertical;
    min-height: 110px;
}

.btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 12px 32px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(26, 115, 232, 0.3);
}

.btn.accent {
    background: var(--accent);
}

.btn.accent:hover {
    background: #ff5519;
    box-shadow: 0 6px 18px rgba(255, 107, 53, 0.3);
}

.btn.full {
    width: 100%;
}

/* 地图 */
.map-wrap {
    margin-top: 40px;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.map-wrap img {
    width: 100%;
    height: 320px;
    object-fit: cover;
}

/* ===== 友情链接 ===== */
.links-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.link-card {
    background: #fff;
    padding: 18px 22px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 14px;
    border-left: 3px solid var(--primary);
}

.link-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-left-color: var(--accent);
}

.link-card .link-ic {
    width: 44px;
    height: 44px;
    background: var(--secondary);
    color: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.link-card .link-title {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 15px;
}

.link-card .link-desc {
    font-size: 13px;
    color: var(--text-gray);
}

/* ===== CTA ===== */
.cta {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: #fff;
    text-align: center;
    padding: 56px 0;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 70% 30%, rgba(255, 107, 53, 0.3), transparent 50%);
}

.cta .container {
    position: relative;
    z-index: 1;
}

.cta h2 {
    font-size: 28px;
    margin-bottom: 14px;
}

.cta p {
    font-size: 16px;
    opacity: 0.95;
    margin-bottom: 24px;
}

/* ===== 返回顶部 ===== */
.back-top {
    position: fixed;
    right: 22px;
    bottom: 90px;
    width: 46px;
    height: 46px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    box-shadow: 0 6px 18px rgba(26, 115, 232, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 900;
}

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

.back-top:hover {
    background: var(--accent);
    transform: translateY(-4px);
}

/* ===== 页脚 ===== */
.footer {
    background: #1e293b;
    color: #cbd5e1;
    padding: 50px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 36px;
    margin-bottom: 30px;
}

.footer-col h3 {
    color: #fff;
    font-size: 17px;
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 36px;
    height: 2px;
    background: var(--accent);
}

.footer-col p {
    font-size: 14px;
    line-height: 1.9;
    margin-bottom: 14px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul a {
    color: #cbd5e1;
    font-size: 14px;
}

.footer-col ul a:hover {
    color: var(--accent);
    padding-left: 4px;
}

.footer-contact li {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    font-size: 14px;
    color: #cbd5e1;
}

.footer-contact .fic {
    color: var(--accent);
    flex-shrink: 0;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
    color: #94a3b8;
}

.footer-bottom a {
    color: #94a3b8;
}

.footer-bottom a:hover {
    color: var(--accent);
}