/* ===== 全局重置 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: #333;
    line-height: 1.6;
    background: #fff;
    font-size: 14px;
}
a { text-decoration: none; color: inherit; transition: all 0.3s; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; border: none; }
.container { width: 1200px; margin: 0 auto; }
.clearfix::after { content: ""; display: block; clear: both; }

/* ===== 顶部信息栏 ===== */
.top-bar {
    background: #f5f7fa;
    border-bottom: 1px solid #e8e8e8;
    font-size: 13px;
    color: #666;
}
.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 36px;
}
.top-bar .left span { margin-right: 20px; }
.top-bar .right a { margin-left: 20px; }
.top-bar .right a:hover { color: #1a5490; }

/* ===== 头部 Logo + 导航 ===== */
.header {
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 90px;
}
.logo-area { display: flex; align-items: center; }
.logo-icon {
    width: 60px; height: 60px;
    background: linear-gradient(135deg, #1a5490, #2c7ac9);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: bold; font-size: 22px;
    margin-right: 14px;
    letter-spacing: -1px;
}
.logo-text h1 {
    font-size: 22px;
    color: #1a5490;
    font-weight: 700;
    letter-spacing: 1px;
}
.logo-text p {
    font-size: 12px;
    color: #888;
    margin-top: 2px;
    letter-spacing: 2px;
}
.header-phone {
    text-align: right;
    margin-right: 30px;
}
.header-phone .label { font-size: 13px; color: #888; }
.header-phone .number {
    font-size: 24px;
    color: #e63946;
    font-weight: bold;
    font-family: Arial, sans-serif;
}

/* ===== 导航菜单 ===== */
.nav { display: flex; align-items: center; }
.nav > li { position: relative; }
.nav > li > a {
    display: block;
    padding: 0 22px;
    line-height: 90px;
    font-size: 16px;
    color: #333;
    font-weight: 500;
    position: relative;
}
.nav > li > a:hover,
.nav > li.active > a {
    color: #1a5490;
}
.nav > li > a::after {
    content: "";
    position: absolute;
    bottom: 0; left: 50%;
    width: 0; height: 3px;
    background: #1a5490;
    transition: all 0.3s;
    transform: translateX(-50%);
}
.nav > li > a:hover::after,
.nav > li.active > a::after { width: 60%; }

/* 下拉菜单 */
.nav .dropdown {
    position: absolute;
    top: 100%; left: 0;
    min-width: 180px;
    background: #fff;
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
    border-top: 3px solid #1a5490;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s;
    z-index: 50;
}
.nav > li:hover .dropdown {
    opacity: 1; visibility: visible; transform: translateY(0);
}
.nav .dropdown li a {
    display: block;
    padding: 12px 20px;
    font-size: 14px;
    color: #555;
    border-bottom: 1px solid #f0f0f0;
}
.nav .dropdown li:last-child a { border-bottom: none; }
.nav .dropdown li a:hover {
    background: #f5f9ff;
    color: #1a5490;
    padding-left: 26px;
}

/* ===== Banner ===== */
.banner {
    position: relative;
    height: 480px;
    overflow: hidden;
    background: linear-gradient(135deg, #0d3b66 0%, #1a5490 50%, #2c7ac9 100%);
}
.banner-bg {
    position: absolute; inset: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.06) 0%, transparent 40%),
        linear-gradient(135deg, #0d3b66 0%, #1a5490 50%, #2c7ac9 100%);
}
.banner-bg::before {
    content: "";
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 40px 40px;
}
.banner .container {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}
.banner-content { color: #fff; max-width: 680px; }
.banner-content .tag {
    display: inline-block;
    padding: 6px 18px;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 20px;
    font-size: 14px;
    margin-bottom: 20px;
    backdrop-filter: blur(4px);
}
.banner-content h2 {
    font-size: 44px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 16px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.banner-content h2 span { color: #ffd166; }
.banner-content p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 30px;
    line-height: 1.8;
}
.banner-btns a {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    margin-right: 16px;
    transition: all 0.3s;
}
.banner-btns .btn-primary {
    background: #e63946;
    color: #fff;
}
.banner-btns .btn-primary:hover {
    background: #c92d3a;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(230,57,70,0.4);
}
.banner-btns .btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
}
.banner-btns .btn-outline:hover {
    background: #fff;
    color: #1a5490;
    border-color: #fff;
}

/* Banner 右侧装饰 */
.banner-deco {
    position: absolute;
    right: 5%; top: 50%;
    transform: translateY(-50%);
    width: 340px; height: 340px;
    border: 2px solid rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
}
.banner-deco::before {
    content: "";
    position: absolute; inset: 30px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 50%;
}
.banner-deco .deco-text {
    text-align: center;
    color: #fff;
}
.banner-deco .deco-text .big {
    font-size: 64px;
    font-weight: bold;
    color: #ffd166;
    line-height: 1;
}
.banner-deco .deco-text .small {
    font-size: 16px;
    opacity: 0.8;
    margin-top: 8px;
}

/* ===== 通用区块标题 ===== */
.section { padding: 70px 0; }
.section-gray { background: #f7f9fc; }
.section-title {
    text-align: center;
    margin-bottom: 50px;
}
.section-title h2 {
    font-size: 32px;
    color: #222;
    font-weight: 700;
    margin-bottom: 12px;
}
.section-title .line {
    width: 50px; height: 3px;
    background: #1a5490;
    margin: 0 auto 16px;
}
.section-title p {
    font-size: 15px;
    color: #888;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 服务项目 ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.service-card {
    background: #fff;
    border: 1px solid #e8eef5;
    border-radius: 8px;
    padding: 30px 24px;
    text-align: center;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}
.service-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: #1a5490;
    transform: scaleX(0);
    transition: transform 0.3s;
}
.service-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(26,84,144,0.15);
    border-color: #1a5490;
}
.service-card:hover::before { transform: scaleX(1); }
.service-card .icon {
    width: 70px; height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #eaf2fb, #d6e6f7);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 32px;
    color: #1a5490;
    transition: all 0.3s;
}
.service-card:hover .icon {
    background: linear-gradient(135deg, #1a5490, #2c7ac9);
    color: #fff;
    transform: rotateY(180deg);
}
.service-card h3 {
    font-size: 18px;
    color: #222;
    margin-bottom: 12px;
    font-weight: 600;
}
.service-card p {
    font-size: 13px;
    color: #777;
    line-height: 1.7;
    margin-bottom: 16px;
}
.service-card .more {
    font-size: 13px;
    color: #1a5490;
    font-weight: 500;
}
.service-card .more:hover { letter-spacing: 1px; }

/* ===== 选择我们的理由 ===== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}
.advantage-item {
    text-align: center;
    padding: 20px;
}
.advantage-item .num {
    font-size: 48px;
    font-weight: bold;
    color: #1a5490;
    font-family: Arial, sans-serif;
    line-height: 1;
    margin-bottom: 8px;
}
.advantage-item .num span { font-size: 20px; color: #e63946; }
.advantage-item h4 {
    font-size: 18px;
    color: #222;
    margin-bottom: 10px;
}
.advantage-item p {
    font-size: 13px;
    color: #777;
    line-height: 1.7;
}

/* ===== 证书案例展示 ===== */
.cases-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 40px;
}
.cases-filter button {
    padding: 8px 24px;
    border: 1px solid #d0d7de;
    background: #fff;
    color: #555;
    font-size: 14px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
}
.cases-filter button:hover,
.cases-filter button.active {
    background: #1a5490;
    color: #fff;
    border-color: #1a5490;
}
.cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.case-item {
    background: #fff;
    border: 1px solid #e8eef5;
    border-radius: 6px;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
}
.case-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
.case-item .img-box {
    height: 200px;
    overflow: hidden;
    background: #f5f7fa;
    display: flex;
    align-items: center;
    justify-content: center;
}
.case-item .img-box img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}
.case-item:hover .img-box img { transform: scale(1.08); }
.case-item .case-info {
    padding: 14px 16px;
    text-align: center;
}
.case-item .case-info h4 {
    font-size: 14px;
    color: #333;
    font-weight: 500;
    line-height: 1.4;
}

/* ===== 关于我们简介 ===== */
.about-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}
.about-text h2 {
    font-size: 28px;
    color: #222;
    margin-bottom: 20px;
    font-weight: 700;
}
.about-text h2 span { color: #1a5490; }
.about-text p {
    font-size: 15px;
    color: #666;
    line-height: 1.9;
    margin-bottom: 16px;
    text-align: justify;
}
.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
}
.about-feature {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background: #f5f9ff;
    border-radius: 6px;
    border-left: 3px solid #1a5490;
}
.about-feature .ico {
    font-size: 20px;
    margin-right: 10px;
    color: #1a5490;
}
.about-feature span { font-size: 14px; color: #444; font-weight: 500; }
.about-image {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}
.about-image img { width: 100%; height: 380px; object-fit: cover; }
.about-image .badge {
    position: absolute;
    bottom: 20px; left: 20px;
    background: rgba(26,84,144,0.95);
    color: #fff;
    padding: 16px 24px;
    border-radius: 6px;
    backdrop-filter: blur(4px);
}
.about-image .badge .b-num {
    font-size: 32px; font-weight: bold; color: #ffd166;
}
.about-image .badge .b-text { font-size: 13px; opacity: 0.9; }

/* ===== 联系板块 ===== */
.contact-section {
    background: linear-gradient(135deg, #0d3b66, #1a5490);
    color: #fff;
}
.contact-section .section-title h2 { color: #fff; }
.contact-section .section-title p { color: rgba(255,255,255,0.7); }
.contact-section .section-title .line { background: #ffd166; }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}
.contact-info h3 {
    font-size: 22px;
    margin-bottom: 24px;
    color: #fff;
}
.contact-info-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 22px;
    padding-bottom: 22px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.contact-info-item:last-child { border-bottom: none; }
.contact-info-item .c-icon {
    width: 44px; height: 44px;
    background: rgba(255,255,255,0.12);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 20px;
    margin-right: 16px;
    flex-shrink: 0;
}
.contact-info-item .c-text h4 {
    font-size: 15px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 4px;
    font-weight: normal;
}
.contact-info-item .c-text p {
    font-size: 17px;
    color: #fff;
    font-weight: 500;
}
.contact-form {
    background: rgba(255,255,255,0.08);
    padding: 36px;
    border-radius: 8px;
    backdrop-filter: blur(6px);
}
.contact-form h3 {
    font-size: 20px;
    margin-bottom: 24px;
    color: #fff;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: 13px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 6px;
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.1);
    color: #fff;
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,0.5); }
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #ffd166;
    background: rgba(255,255,255,0.15);
}
.form-group textarea { resize: vertical; min-height: 90px; }
.form-group select option { color: #333; }
.submit-btn {
    width: 100%;
    padding: 14px;
    background: #e63946;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
}
.submit-btn:hover {
    background: #c92d3a;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(230,57,70,0.4);
}

/* ===== 页脚 ===== */
.footer {
    background: #0a1929;
    color: rgba(255,255,255,0.6);
    padding: 50px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer-col h4 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 20px;
    font-weight: 600;
}
.footer-col p {
    font-size: 13px;
    line-height: 1.9;
    margin-bottom: 10px;
}
.footer-col ul li {
    margin-bottom: 10px;
    font-size: 13px;
}
.footer-col ul li a:hover { color: #ffd166; }
.footer-col .footer-logo {
    display: flex; align-items: center;
    margin-bottom: 16px;
}
.footer-col .footer-logo .logo-icon {
    width: 44px; height: 44px; font-size: 16px;
}
.footer-col .footer-logo .logo-text h1 { font-size: 16px; color: #fff; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
}
.footer-bottom a { color: rgba(255,255,255,0.6); }
.footer-bottom a:hover { color: #ffd166; }

/* ===== 悬浮客服栏 ===== */
.float-bar {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.float-item {
    width: 60px;
    background: #fff;
    border: 1px solid #e8eef5;
    text-align: center;
    padding: 10px 4px;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    font-size: 12px;
    color: #555;
}
.float-item:first-child { border-radius: 6px 6px 0 0; }
.float-item:last-child { border-radius: 0 0 6px 6px; }
.float-item:hover {
    background: #1a5490;
    color: #fff;
}
.float-item .f-icon { font-size: 22px; display: block; margin-bottom: 4px; }
.float-item .f-popup {
    position: absolute;
    right: 100%;
    top: 50%;
    transform: translateY(-50%);
    background: #fff;
    border: 1px solid #e8eef5;
    border-radius: 6px;
    padding: 12px 16px;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    margin-right: 10px;
    color: #333;
    font-size: 13px;
}
.float-item:hover .f-popup {
    opacity: 1; visibility: visible;
    margin-right: 14px;
}
.float-item .f-popup .phone-num {
    font-size: 18px; color: #e63946; font-weight: bold;
}
.float-top {
    width: 60px;
    background: #1a5490;
    color: #fff;
    text-align: center;
    padding: 10px 4px;
    cursor: pointer;
    border-radius: 0 0 6px 6px;
    font-size: 12px;
    transition: all 0.3s;
    display: none;
}
.float-top.show { display: block; }
.float-top:hover { background: #e63946; }
.float-top .f-icon { font-size: 22px; display: block; margin-bottom: 4px; }

/* ===== 内页 Banner ===== */
.page-banner {
    height: 220px;
    background: linear-gradient(135deg, #0d3b66, #1a5490, #2c7ac9);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}
.page-banner::before {
    content: "";
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 40px 40px;
}
.page-banner .container { position: relative; color: #fff; }
.page-banner h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
}
.page-banner p {
    font-size: 15px;
    opacity: 0.8;
}
.breadcrumb {
    background: #f5f7fa;
    padding: 14px 0;
    font-size: 13px;
    color: #888;
    border-bottom: 1px solid #e8e8e8;
}
.breadcrumb a { color: #888; }
.breadcrumb a:hover { color: #1a5490; }
.breadcrumb span { margin: 0 8px; }

/* ===== 服务详情页 ===== */
.service-detail-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.service-detail-card {
    background: #fff;
    border: 1px solid #e8eef5;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s;
}
.service-detail-card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    transform: translateY(-4px);
}
.service-detail-card .sd-header {
    padding: 24px;
    background: linear-gradient(135deg, #1a5490, #2c7ac9);
    color: #fff;
}
.service-detail-card .sd-header .sd-icon {
    font-size: 36px;
    margin-bottom: 10px;
}
.service-detail-card .sd-header h3 { font-size: 20px; margin-bottom: 6px; }
.service-detail-card .sd-header p { font-size: 13px; opacity: 0.8; }
.service-detail-card .sd-body { padding: 24px; }
.service-detail-card .sd-body ul li {
    padding: 8px 0;
    border-bottom: 1px dashed #eee;
    font-size: 14px;
    color: #555;
    display: flex;
    align-items: center;
}
.service-detail-card .sd-body ul li::before {
    content: "✓";
    color: #1a5490;
    font-weight: bold;
    margin-right: 10px;
}
.service-detail-card .sd-body ul li:last-child { border-bottom: none; }

/* ===== 图片灯箱 ===== */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
}
.lightbox.show { display: flex; }
.lightbox img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 4px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}
.lightbox .close-btn {
    position: absolute;
    top: 20px; right: 30px;
    color: #fff;
    font-size: 36px;
    cursor: pointer;
    background: none;
    border: none;
}

/* ===== 响应式 ===== */
@media (max-width: 1240px) {
    .container { width: 96%; }
}
@media (max-width: 992px) {
    .services-grid, .advantages-grid, .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-wrap, .contact-grid, .footer-grid {
        grid-template-columns: 1fr;
    }
    .banner-deco { display: none; }
    .banner-content h2 { font-size: 32px; }
    /* 头部改为上下布局 */
    .header .container {
        flex-direction: column;
        height: auto;
        padding: 12px 0;
        gap: 8px;
    }
    .logo-area { justify-content: center; }
    .logo-icon { width: 48px; height: 48px; font-size: 18px; }
    .logo-text h1 { font-size: 18px; text-align: center; }
    .logo-text p { font-size: 10px; text-align: center; }
    .nav { flex-wrap: wrap; justify-content: center; }
    .nav > li > a {
        padding: 0 14px;
        font-size: 14px;
        line-height: 40px;
    }
    .nav > li > a::after { display: none; }
}
@media (max-width: 640px) {
    .services-grid, .advantages-grid, .cases-grid, .service-detail-grid {
        grid-template-columns: 1fr;
    }
    .form-row { grid-template-columns: 1fr; }
    .top-bar { display: none; }
    .float-bar { display: none; }
    /* 头部进一步适配手机 */
    .header { position: relative; }
    .header .container { padding: 10px 0; gap: 6px; }
    .logo-icon { width: 40px; height: 40px; font-size: 15px; margin-right: 10px; }
    .logo-text h1 { font-size: 15px; }
    .logo-text p { display: none; }
    .nav > li > a {
        padding: 0 8px;
        font-size: 13px;
        line-height: 34px;
    }
    .nav .dropdown { display: none; }
    /* Banner */
    .banner { height: auto; padding: 50px 0; }
    .banner-content h2 { font-size: 24px; }
    .banner-content p { font-size: 14px; margin-bottom: 20px; }
    .banner-content .tag { font-size: 12px; padding: 4px 14px; margin-bottom: 14px; }
    .banner-btns a { padding: 10px 24px; font-size: 14px; margin-right: 10px; }
    /* 内页Banner */
    .page-banner { height: auto; padding: 40px 0; }
    .page-banner h2 { font-size: 26px; }
    .page-banner p { font-size: 13px; }
    /* 通用区块 */
    .section { padding: 40px 0; }
    .section-title { margin-bottom: 30px; }
    .section-title h2 { font-size: 24px; }
    .section-title p { font-size: 13px; }
    /* 关于我们图片 */
    .about-image img { height: 260px; }
    /* 联系表单 */
    .contact-form { padding: 24px; }
    /* 页脚 */
    .footer-grid { gap: 30px; padding-bottom: 30px; }
    /* 案例筛选 */
    .cases-filter button { padding: 6px 14px; font-size: 13px; }
}