:root {
    /* 基于logo的蓝色调色板 */
    --color-primary: #2563a8;
    --color-primary-dark: #1a4a7e;
    --color-primary-light: #3b7bc9;
    --color-accent: #4a90e2;
    --color-secondary: #1e3a5f;

    /* 中性色 */
    --color-black: #0f1419;
    --color-white: #ffffff;
    --color-gray-dark: #2d3748;
    --color-gray: #718096;
    --color-gray-light: #cbd5e0;
    --color-bg-light: #f7fafc;
    --color-bg-blue: #ebf4ff;

    /* 字体 */
    --font-display: 'Playfair Display', serif;
    --font-body: 'DM Sans', sans-serif;

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-dark);
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 容器 */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 3rem;
}

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(37, 99, 168, 0.1);
    transition: all 0.3s ease;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--color-primary);
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: translateY(-2px);
}

.logo-img {
    height: 45px;
    width: auto;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    gap: 3rem;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--color-gray-dark);
    letter-spacing: 0.02em;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-primary);
}

/* 主视觉区 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 5rem;
    position: relative;
    background: linear-gradient(135deg, #ebf4ff 0%, #ffffff 50%, #f0f7ff 100%);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(37, 99, 168, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    max-width: 900px;
    position: relative;
    z-index: 1;
}

.hero-label {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 2rem;
    font-weight: 600;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 3rem;
    color: var(--color-black);
}

.title-line {
    display: block;
}

.title-emphasis {
    font-style: italic;
    position: relative;
    display: inline-block;
    color: var(--color-primary);
}

.title-emphasis::after {
    content: '';
    position: absolute;
    bottom: 0.15em;
    left: 0;
    width: 100%;
    height: 0.2em;
    background: rgba(37, 99, 168, 0.2);
    z-index: -1;
}

.hero-meta {
    display: flex;
    gap: 4rem;
    margin-top: 4rem;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.meta-number {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.meta-text {
    font-size: 0.9rem;
    color: var(--color-gray);
}

.hero-scroll {
    position: absolute;
    bottom: 3rem;
    left: 3rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.scroll-text {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gray);
}

.scroll-line {
    width: 60px;
    height: 1px;
    background: var(--color-primary);
}

/* 介绍区 */
.intro {
    padding: var(--spacing-xxl) 0;
    background: var(--color-white);
}

.intro-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 6rem;
    align-items: start;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 2rem;
    color: var(--color-black);
}

.intro-description {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-gray);
    margin-bottom: 2.5rem;
}

.btn-text {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 0.25rem;
    transition: all 0.3s ease;
}

.btn-text:hover {
    gap: 1rem;
    color: var(--color-primary-dark);
}

.intro-stats {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    padding-top: 2rem;
}

.stat-item {
    border-left: 3px solid var(--color-primary);
    padding-left: 1.5rem;
    transition: all 0.3s ease;
}

.stat-item:hover {
    border-left-color: var(--color-accent);
    transform: translateX(5px);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-gray);
}

/* 服务展示 */
.services {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg-blue);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 300px;
    background: linear-gradient(180deg, rgba(37, 99, 168, 0.03) 0%, transparent 100%);
    pointer-events: none;
}

.services-header {
    margin-bottom: 4rem;
    position: relative;
    z-index: 1;
}

.section-label {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-primary);
    display: block;
    margin-bottom: 1rem;
    font-weight: 600;
}

.section-title-large {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-black);
}

.services-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    z-index: 1;
}

.service-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4rem;
    padding: 3rem 2rem;
    border-top: 1px solid rgba(37, 99, 168, 0.15);
    background: var(--color-white);
    transition: all 0.4s ease;
    margin-bottom: 1.5rem;
}

.service-item:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 40px rgba(37, 99, 168, 0.1);
}

.service-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.service-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 0.5rem;
    color: var(--color-black);
}

.service-desc {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-gray);
    max-width: 600px;
}

.service-link {
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--color-primary);
    margin-top: 0.5rem;
    transition: all 0.3s ease;
}

.service-link:hover {
    color: var(--color-accent);
    letter-spacing: 0.05em;
}

.service-number {
    font-family: var(--font-display);
    font-size: 5rem;
    font-weight: 700;
    color: rgba(37, 99, 168, 0.1);
    line-height: 1;
}

/* CTA区域 */
.cta {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.cta-text {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
}

.btn-primary {
    display: inline-block;
    padding: 1.2rem 3rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--color-primary);
    background: var(--color-white);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

/* 页面标题 */
.page-hero {
    padding: 10rem 0 6rem;
    background: linear-gradient(135deg, #ebf4ff 0%, #f0f7ff 100%);
    position: relative;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 40%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(37, 99, 168, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.page-hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.page-label {
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-primary);
    display: block;
    margin-bottom: 2rem;
    font-weight: 600;
}

.page-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 7vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 2rem;
    color: var(--color-black);
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--color-gray);
}

/* 服务详情 */
.services-detail {
    padding: var(--spacing-xxl) 0;
    background: var(--color-white);
}

.detail-item {
    margin-bottom: 6rem;
    padding-bottom: 6rem;
    border-bottom: 1px solid var(--color-gray-light);
}

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

.detail-header {
    display: flex;
    align-items: baseline;
    gap: 2rem;
    margin-bottom: 2rem;
}

.detail-number {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.detail-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--color-black);
}

.detail-content {
    padding-left: 5rem;
}

.detail-intro {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-gray);
    margin-bottom: 2.5rem;
    max-width: 700px;
}

.detail-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
    transition: all 0.3s ease;
}

.feature-row:hover {
    transform: translateX(5px);
}

.feature-icon {
    font-size: 1.2rem;
    color: var(--color-primary);
    font-weight: 700;
}

.feature-text {
    font-size: 1rem;
    color: var(--color-gray-dark);
}

/* 联系页面 */
.contact-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-white);
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 6rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.info-block {
    border-left: 3px solid var(--color-primary);
    padding-left: 2rem;
}

.info-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--color-black);
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.info-label {
    font-size: 0.85rem;
    color: var(--color-gray);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-size: 1.1rem;
    color: var(--color-gray-dark);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* 表单 */
.contact-form-wrapper {
    background: var(--color-bg-blue);
    padding: 3rem;
}

.form-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    color: var(--color-black);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.form-label {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-dark);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 1rem;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-gray-dark);
    background: var(--color-white);
    border: 2px solid var(--color-gray-light);
    transition: all 0.3s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 168, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
}

.btn-submit {
    padding: 1.2rem 3rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    background: var(--color-primary);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    align-self: flex-start;
}

.btn-submit:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(37, 99, 168, 0.3);
}

.form-note {
    font-size: 0.9rem;
    color: var(--color-gray);
    text-align: center;
}

/* 页脚 */
.footer {
    background: var(--color-secondary);
    color: var(--color-white);
    padding: 4rem 0 2rem;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-tagline {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-title {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.footer-col a {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-col a:hover {
    color: var(--color-white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    font-size: 0.85rem;
}

.footer-legal,
.footer-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-legal a,
.footer-info span {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-legal a:hover {
    color: rgba(255, 255, 255, 0.8);
}

.separator {
    color: rgba(255, 255, 255, 0.3);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .container-wide {
        padding: 0 2rem;
    }

    .intro-grid {
        grid-template-columns: 1fr;
        gap: 4rem;
    }

    .contact-layout {
        grid-template-columns: 1fr;
        gap: 4rem;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        gap: 1.5rem;
    }

    .hero {
        min-height: 80vh;
    }

    .hero-meta {
        flex-direction: column;
        gap: 2rem;
    }

    .hero-scroll {
        display: none;
    }

    .services-list {
        gap: 1rem;
    }

    .service-item {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2rem 1.5rem;
    }

    .service-number {
        font-size: 3rem;
    }

    .detail-content {
        padding-left: 0;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container,
    .container-wide {
        padding: 0 1.5rem;
    }

    .nav {
        padding: 1rem 0;
    }

    .logo-img {
        height: 35px;
    }

    .logo-text {
        font-size: 1.2rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.85rem;
    }

    .contact-form-wrapper {
        padding: 2rem 1.5rem;
    }
}