:root {
    --primary-color: #2563EB;
    --text-color: #111111;
    --light-text: #666666;
    --bg-color: #FFFFFF;
    --light-bg: #F8F9FA;
    --border-color: #E9ECEF;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-padding-top: 88px;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
}

section {
    scroll-margin-top: 88px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.28);
    outline-offset: 3px;
}

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

/* 导航栏样式 */
.navbar {
    background-color: var(--bg-color);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
}

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

.logo-img {
    width: 44px;
    height: 44px;
    border-radius: 4px;
    background-color: white;
    padding: 4px;
}

.logo-text {
    font-size: 26px;
    font-weight: bold;
    color: var(--text-color);
}

.logo-sub {
    font-size: 12px;
    color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.08);
    padding: 3px 10px;
    border-radius: 4px;
    font-weight: 500;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    padding: 10px 24px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav-cta:hover {
    background-color: #1D4ED8;
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: white;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle span {
    width: 20px;
    height: 2px;
    background-color: var(--text-color);
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.navbar.is-open .nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.navbar.is-open .nav-toggle span:nth-child(2) {
    opacity: 0;
}

.navbar.is-open .nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Hero区域样式 */
.hero {
    background: var(--bg-color);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg-logo {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('logo.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.04;
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    text-align: center;
    max-width: 700px;
}

.hero h1 {
    font-size: 52px;
    margin-bottom: 20px;
    font-weight: bold;
    color: var(--text-color);
    line-height: 1.2;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    color: var(--light-text);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.cta-button {
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 17px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.cta-button:hover {
    background-color: #1D4ED8;
    transform: translateY(-2px);
}

.cta-button-secondary {
    background-color: transparent;
    color: var(--text-color);
    text-decoration: none;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 17px;
    font-weight: 600;
    border: 2px solid var(--text-color);
    transition: all 0.3s ease;
    display: inline-block;
}

.cta-button-secondary:hover {
    background-color: var(--text-color);
    color: white;
}

.hero-promises {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    padding-top: 50px;
    border-top: 1px dashed var(--border-color);
    margin-top: 30px;
}

.promise-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background-color: rgba(37, 99, 235, 0.08);
    border-radius: 30px;
    font-size: 17px;
    font-weight: 600;
    color: var(--text-color);
    transition: all 0.3s ease;
    border: 1px solid rgba(37, 99, 235, 0.15);
    position: relative;
}

.promise-item:hover {
    background-color: rgba(37, 99, 235, 0.15);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.12);
}

.promise-item i {
    color: var(--primary-color);
    font-size: 22px;
}

.promise-tooltip {
    position: absolute;
    bottom: calc(100% + 15px);
    left: 50%;
    transform: translateX(-50%);
    width: 320px;
    padding: 20px;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 100;
    border: 1px solid var(--border-color);
}

.promise-item:hover .promise-tooltip {
    opacity: 1;
    visibility: visible;
    bottom: calc(100% + 20px);
}

.promise-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 10px;
    border-style: solid;
    border-color: white transparent transparent transparent;
}

.promise-tooltip h4 {
    margin-bottom: 10px;
    font-size: 15px;
    color: var(--text-color);
    font-weight: 600;
    line-height: 1.5;
}

.promise-tooltip p {
    font-size: 13px;
    color: var(--light-text);
    line-height: 1.7;
    margin: 0;
}

/* 关于我们样式 */
.about {
    padding: 60px 0;
    background-color: #ffffff;
}

.about-wall {
    background: white;
    border-radius: 20px;
    padding: 0;
    box-shadow: 0 10px 40px rgba(37, 99, 235, 0.15);
    overflow: hidden;
    position: relative;
}

.about-wall .container {
    position: relative;
    overflow: hidden;
    border-radius: 20px;
}

.about-wall .container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 80%;
    height: 100%;
    background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
    border-radius: 0 50% 50% 0;
    z-index: 0;
}

.about-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 40px;
    padding-bottom: 25px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    position: relative;
    z-index: 1;
    padding: 30px 40px;
    padding-bottom: 15px;
}

.about-main {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    align-items: stretch;
    position: relative;
    z-index: 1;
    padding: 0 40px 40px;
}

.about-en {
    font-size: 24px;
    font-weight: bold;
    color: white;
    letter-spacing: 3px;
}

.about-divider {
    color: rgba(255, 255, 255, 0.6);
    font-size: 20px;
}

.about-zh {
    font-size: 28px;
    font-weight: bold;
    color: white;
}

.about-left {
    flex: 1;
    min-width: 350px;
    padding: 30px;
}

.about-slogan {
    color: white;
    margin-bottom: 30px;
}

.about-slogan p {
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 10px;
    opacity: 0.95;
}

.about-highlights {
    margin-bottom: 30px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: white;
    font-size: 14px;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
}

.highlight-item:last-child {
    border-bottom: none;
}

.highlight-dot {
    color: #FFD700;
    font-size: 16px;
}

.about-tags {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.tag-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 20px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 14px;
    color: white;
}

.tag-yellow {
    background: linear-gradient(135deg, #FFD700, #FFA500);
}

.tag-green {
    background: linear-gradient(135deg, #22C55E, #16A34A);
}

.tag-orange {
    background: linear-gradient(135deg, #F97316, #EA580C);
}

.tag-blue {
    background: linear-gradient(135deg, #3B82F6, #2563EB);
    border: 2px solid white;
}

.about-right {
    flex: 1.08;
    min-width: 390px;
}

.map-section {
    background-color: white;
    border-radius: 15px;
    padding: 30px 26px 28px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    position: relative;
    overflow: hidden;
}

.map-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2563EB, #1D4ED8);
}

.map-header {
    text-align: right;
    margin-bottom: 12px;
}

.map-title {
    font-size: 22px;
    font-weight: bold;
    color: #2563EB;
    display: block;
}

.map-subtitle {
    font-size: 14px;
    color: #666;
}

.map-container {
    position: relative;
    margin-bottom: 14px;
}

.china-map {
    width: 100%;
    height: 310px;
    overflow: hidden;
}

.china-map--static {
    display: flex;
    align-items: center;
    justify-content: center;
}

.static-china-map {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

.map-info {
    text-align: center;
}

.map-fallback {
    min-height: 310px;
    border: 1px dashed rgba(37, 99, 235, 0.35);
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(34, 197, 94, 0.08));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--primary-color);
    text-align: center;
    padding: 24px;
}

.map-fallback span {
    color: var(--light-text);
    font-size: 13px;
}

.map-info p {
    font-size: 14px;
    color: #666;
    margin-bottom: 10px;
}

.map-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #333;
    font-weight: 600;
}

.stat-star {
    color: #FFD700;
}

.stat-divider {
    color: #999;
}

/* 加入我们样式 */
.join {
    padding: 80px 0;
    background-color: var(--bg-color);
}

.join-header {
    text-align: center;
    margin-bottom: 50px;
}

.join-en {
    font-size: 18px;
    color: var(--primary-color);
    font-weight: bold;
    letter-spacing: 4px;
    display: block;
    margin-bottom: 10px;
}

.join-header h2 {
    font-size: 32px;
    color: var(--text-color);
    font-weight: bold;
    margin-bottom: 12px;
}

.join-subtitle {
    font-size: 16px;
    color: var(--light-text);
}

.join-content {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
    margin-bottom: 40px;
}

.join-advantages {
    flex: 1;
    min-width: 300px;
}

.join-advantages h3,
.join-process h3 {
    font-size: 22px;
    color: var(--text-color);
    font-weight: bold;
    margin-bottom: 25px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-color);
    display: inline-block;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.advantage-item {
    padding: 20px;
    background-color: var(--light-bg);
    border-radius: 12px;
    transition: all 0.3s ease;
}

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

.advantage-icon {
    width: 50px;
    height: 50px;
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}

.advantage-icon i {
    color: var(--primary-color);
    font-size: 24px;
}

.advantage-item h4 {
    font-size: 16px;
    color: var(--text-color);
    font-weight: 600;
    margin-bottom: 8px;
}

.advantage-item p {
    font-size: 14px;
    color: var(--light-text);
    line-height: 1.6;
    margin: 0;
}

.join-process {
    flex: 1;
    min-width: 300px;
}

.process-timeline {
    position: relative;
    padding-left: 30px;
}

.process-timeline::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 10px;
    bottom: 10px;
    width: 2px;
    background-color: var(--primary-color);
    opacity: 0.3;
}

.process-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    position: relative;
}

.process-item:last-child {
    margin-bottom: 0;
}

.process-step {
    width: 32px;
    height: 32px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.process-step span {
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.process-content {
    flex: 1;
}

.process-content h4 {
    font-size: 16px;
    color: var(--text-color);
    font-weight: 600;
    margin-bottom: 4px;
}

.process-content p {
    font-size: 14px;
    color: var(--light-text);
    margin: 0;
}

.join-cta {
    text-align: center;
    margin-top: 30px;
}

.join-btn {
    display: inline-block;
    padding: 14px 48px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-size: 17px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.join-btn:hover {
    background-color: #1D4ED8;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
}

/* 服务项目样式 */
.services {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.services h2 {
    font-size: 32px;
    text-align: center;
    margin-bottom: 50px;
    color: var(--text-color);
    font-weight: bold;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.service-card {
    background-color: var(--bg-color);
    padding: 28px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 18px;
    background-color: rgba(37, 99, 235, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 28px;
}

.service-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--text-color);
    font-weight: 600;
}

.service-card p {
    font-size: 14px;
    color: var(--light-text);
    margin-bottom: 18px;
    line-height: 1.6;
}

.service-features {
    list-style: none;
    padding: 0;
}

.service-features li {
    font-size: 13px;
    color: var(--light-text);
    padding: 7px 0;
    border-bottom: 1px solid var(--border-color);
}

.service-features li:last-child {
    border-bottom: none;
}

/* 案例展示样式 */
.cases {
    padding: 80px 0;
    background-color: var(--bg-color);
}

.cases h2 {
    font-size: 32px;
    text-align: center;
    margin-bottom: 50px;
    color: var(--text-color);
    font-weight: bold;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.case-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    background: linear-gradient(135deg, #EAF1FF 0%, #F7FAFC 55%, #FFF7ED 100%);
    min-height: 190px;
}

.case-card::before {
    content: '案例图片加载中';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light-text);
    font-size: 14px;
    z-index: 0;
}

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

.case-card img {
    width: 100%;
    height: 190px;
    object-fit: cover;
    transition: transform 0.3s ease;
    position: relative;
    z-index: 1;
    display: block;
}

.case-card.image-failed::before {
    content: '案例图片暂未加载';
}

.case-card.image-failed img {
    opacity: 0;
}

.case-card:hover img {
    transform: scale(1.05);
}

.case-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.85));
    padding: 20px;
    color: white;
    z-index: 2;
}

.case-info h3 {
    font-size: 17px;
    margin-bottom: 4px;
}

.case-info p {
    font-size: 12px;
    opacity: 0.85;
}

/* 联系我们样式 */
.contact {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.contact h2 {
    font-size: 32px;
    text-align: center;
    margin-bottom: 36px;
    color: var(--text-color);
    font-weight: bold;
}

.contact-content {
    display: grid;
    grid-template-columns: minmax(300px, 0.9fr) minmax(360px, 1.1fr);
    gap: 0;
    align-items: stretch;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.contact-info {
    min-width: 0;
    padding: 34px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(34, 197, 94, 0.05));
    border-right: 1px solid var(--border-color);
}

.contact-item {
    display: flex;
    gap: 18px;
    padding: 18px 0;
    background-color: transparent;
    border-radius: 0;
    border-bottom: 1px solid rgba(17, 17, 17, 0.08);
    margin-bottom: 0;
    transition: all 0.3s ease;
}

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

.contact-item:hover {
    transform: translateX(2px);
}

.contact-item i {
    color: var(--primary-color);
    font-size: 22px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(37, 99, 235, 0.08);
    border-radius: 8px;
}

.contact-item h4 {
    margin-bottom: 4px;
    color: var(--text-color);
    font-size: 15px;
}

.contact-item p {
    color: var(--light-text);
    font-size: 14px;
    margin: 0;
}

.contact-section-label {
    display: inline-flex;
    align-items: center;
    color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.1);
    border-radius: 999px;
    padding: 5px 12px;
    margin-bottom: 14px;
    font-size: 13px;
    font-weight: 600;
}

.contact-form {
    min-width: 0;
    background-color: var(--bg-color);
    padding: 34px;
    border-radius: 0;
    box-shadow: none;
}

.contact-form h3 {
    margin-bottom: 8px;
    color: var(--text-color);
    font-size: 24px;
    font-weight: 600;
}

.contact-form-note {
    color: var(--light-text);
    font-size: 14px;
    margin: 0 0 22px;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.honeypot-field {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.form-row {
    display: flex;
    gap: 14px;
}

.form-row input {
    flex: 1;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    padding: 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
    background-color: var(--bg-color);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

.form-message {
    min-height: 20px;
    font-size: 13px;
    color: var(--primary-color);
}

.form-message.error {
    color: #DC2626;
}

.submit-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn:hover {
    background-color: #1D4ED8;
    transform: translateY(-1px);
}

.submit-btn:disabled {
    cursor: not-allowed;
    opacity: 0.72;
    transform: none;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.service-card,
.case-card {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease-out forwards;
}

.service-card:nth-child(2) { animation-delay: 0.1s; }
.service-card:nth-child(3) { animation-delay: 0.2s; }
.service-card:nth-child(4) { animation-delay: 0.3s; }

.case-card:nth-child(2) { animation-delay: 0.1s; }
.case-card:nth-child(3) { animation-delay: 0.2s; }
.case-card:nth-child(4) { animation-delay: 0.3s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 页脚样式 */
.footer {
    background-color: var(--text-color);
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo img {
    width: 50px;
    height: 50px;
    border-radius: 4px;
    background-color: white;
    padding: 5px;
}

.footer-logo span {
    font-size: 18px;
    font-weight: bold;
}

.footer-links h4,
.footer-contact h4 {
    margin-bottom: 20px;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.9);
}

.footer-links ul {
    list-style: none;
    padding: 0;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 14px;
}

.footer-links a:hover {
    color: white;
}

.footer-contact p {
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.footer-contact i {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 13px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        padding: 15px 20px;
    }

    .logo {
        gap: 8px;
    }

    .logo-text {
        font-size: 22px;
    }

    .logo-sub {
        display: none;
    }

    .nav-toggle {
        display: flex;
        margin-left: auto;
    }

    .nav-links {
        width: 100%;
        flex-direction: column;
        gap: 0;
        max-height: 0;
        opacity: 0;
        overflow: hidden;
        pointer-events: none;
        transition: max-height 0.25s ease, opacity 0.2s ease, margin-top 0.2s ease;
    }

    .navbar.is-open .nav-links {
        max-height: 360px;
        opacity: 1;
        pointer-events: auto;
        margin-top: 14px;
        border-top: 1px solid var(--border-color);
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 13px 4px;
        font-size: 16px;
    }

    .nav-links a::after {
        display: none;
    }

    .nav-cta {
        display: none;
    }

    .hero h1 {
        font-size: 36px;
    }

    .hero p {
        font-size: 17px;
    }

    .hero-promises {
        padding-top: 28px;
        margin-top: 10px;
    }

    .promise-item {
        width: 100%;
        justify-content: center;
        border-radius: 14px;
        cursor: pointer;
    }

    .promise-tooltip {
        position: static;
        transform: none;
        width: 100%;
        margin-top: 12px;
        display: none;
        box-shadow: none;
    }

    .promise-item:hover .promise-tooltip {
        bottom: auto;
    }

    .promise-item.is-open {
        align-items: stretch;
        flex-wrap: wrap;
    }

    .promise-item.is-open .promise-tooltip {
        display: block;
        opacity: 1;
        visibility: visible;
    }

    .promise-tooltip::after {
        display: none;
    }

    .form-row {
        flex-direction: column;
    }

    .services-grid,
    .cases-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .join-content {
        gap: 40px;
    }
    
    .join-header h2 {
        font-size: 26px;
    }
    
    .join-en {
        font-size: 16px;
    }

    .contact-form,
    .contact-info {
        min-width: 0;
        width: 100%;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .contact-info {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .about-right {
        min-width: 0;
        width: 100%;
    }

    .map-section {
        padding: 26px 20px 24px;
    }

    .china-map {
        height: 280px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 28px;
    }

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

    .cta-button,
    .cta-button-secondary {
        padding: 12px 24px;
        font-size: 15px;
    }

    .about,
    .services,
    .cases,
    .contact,
    .join {
        padding: 50px 0;
    }
    
    .join-btn {
        padding: 12px 36px;
        font-size: 15px;
    }

    .china-map {
        height: 240px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}