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

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f1f3f5;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --border: rgba(0, 0, 0, 0.08);
    --border-light: rgba(0, 0, 0, 0.04);
    --shadow: rgba(0, 0, 0, 0.05);
    --shadow-hover: rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 60px;
}

/* 英文文本样式 */
.title-line-en,
.hero-subtitle-en,
.hero-scroll-en,
.section-title-en,
.section-subtitle-en,
.hero-business-name-en,
.business-title-en,
.business-tagline-en,
.business-desc-en,
.feature-item-en,
.footer-en {
    display: block;
    font-size: 0.75em;
    color: var(--text-tertiary);
    font-weight: 300;
    letter-spacing: 0.3px;
    margin-top: 4px;
    line-height: 1.5;
}

.title-line-en {
    font-size: 0.63em;
    display: block;
    margin-top: 8px;
    white-space: nowrap;
    overflow: visible;
    word-break: keep-all;
    letter-spacing: 0.3px;
    max-width: 100%;
    text-align: center;
}

.hero-subtitle-en {
    font-size: 0.85em;
    margin-top: 8px;
}

.hero-scroll-en {
    font-size: 0.85em;
    margin-left: 4px;
}

.section-title-en {
    font-size: 0.65em;
    margin-top: 8px;
}

.section-subtitle-en {
    font-size: 0.85em;
    margin-top: 6px;
}

.hero-business-name-en {
    font-size: 0.75em;
    margin-top: 2px;
}

.business-title-en {
    font-size: 0.7em;
    margin-top: 6px;
}

.business-tagline-en {
    font-size: 0.85em;
    margin-top: 4px;
}

.business-desc-en {
    font-size: 0.9em;
    margin-top: 12px;
    line-height: 1.7;
}

.feature-item-en {
    font-size: 0.85em;
    margin-top: 2px;
}

.footer-en {
    font-size: 0.9em;
    margin-top: 4px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    z-index: 1000;
    padding: 24px 0;
    border-bottom: 1px solid var(--border-light);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px var(--shadow);
}

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

.logo-text {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 48px;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 400;
    font-size: 14px;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
    position: relative;
}

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

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

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

/* 英雄区 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 0 100px;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: 0 40px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 400;
    letter-spacing: 1px;
    line-height: 1.4;
    margin-top: 90px;
    margin-bottom: 24px;
    color: var(--text-primary);
    text-align: center;
    width: 100%;
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.title-line-en {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

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

.hero-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 2px;
    margin-bottom: 48px;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.2s forwards;
}

/* 首页业务板块展示 */
.hero-business {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    margin: 100px 0 120px;
    flex-wrap: nowrap;
    opacity: 1;
}

.hero-business-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: transform 0.3s ease, opacity 0.3s ease;
    padding: 0;
    flex: 0 1 auto;
    min-width: 80px;
    text-decoration: none;
    color: inherit;
}

.hero-business-item:link,
.hero-business-item:visited,
.hero-business-item:hover,
.hero-business-item:active {
    text-decoration: none;
}

.hero-business-item:hover {
    transform: translateY(-2px);
    opacity: 0.8;
}

.hero-business-icon {
    width: 56px;
    height: 73px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    transition: transform 0.3s ease;
    padding-top: 0;
}

.hero-business-item:hover .hero-business-icon {
    transform: scale(1.05);
}

.hero-business-icon svg {
    width: 130%;
    height: 130%;
    transform-origin: top center;
}

.hero-business-name {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
    text-align: center;
    white-space: nowrap;
    width: 100%;
    line-height: 1.4;
}

.hero-business-item:hover .hero-business-name {
    color: var(--text-primary);
}

.hero-scroll {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.3s forwards;
    cursor: pointer;
    text-decoration: none;
    color: var(--text-secondary);
    transition: color 0.3s ease;
    margin-top: 120px;
    margin-bottom: 40px;
}

.hero-scroll:hover {
    color: var(--accent);
}

.hero-scroll span {
    font-size: 12px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.scroll-arrow {
    width: 1px;
    height: 32px;
    background: currentColor;
    position: relative;
    animation: scrollDown 2s ease infinite;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: -4px;
    width: 9px;
    height: 9px;
    border-right: 1px solid currentColor;
    border-bottom: 1px solid currentColor;
    transform: rotate(45deg);
}

@keyframes scrollDown {
    0%, 100% {
        transform: translateY(0);
        opacity: 1;
    }
    50% {
        transform: translateY(12px);
        opacity: 0.4;
    }
}

/* 业务板块 */
.business {
    padding: 140px 0;
    background: var(--bg-primary);
    scroll-margin-top: 80px;
}

.section-header {
    text-align: center;
    margin-bottom: 100px;
}

.section-title {
    font-size: clamp(40px, 5vw, 56px);
    font-weight: 300;
    letter-spacing: -1.5px;
    margin-bottom: 16px;
    color: var(--text-primary);
    line-height: 1.2;
}

.section-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    font-weight: 400;
}

.business-detail {
    margin-bottom: 120px;
    padding: 60px;
    background: var(--bg-secondary);
    border-radius: 24px;
    border: 1px solid var(--border-light);
    transition: all 0.4s ease;
    opacity: 1;
    transform: translateY(0);
}

.business-detail:last-child {
    margin-bottom: 0;
}

.business-detail.visible {
    opacity: 1;
    transform: translateY(0);
}

.business-detail:hover {
    box-shadow: 0 20px 60px var(--shadow-hover);
    transform: translateY(-4px);
    border-color: var(--border);
}

.business-detail-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-bottom: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border-light);
}

.business-icon {
    width: 64px;
    height: 83px;
    flex-shrink: 0;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    transition: transform 0.4s ease;
    margin-bottom: 8px;
    padding-top: 0;
}

.business-icon svg {
    width: 130%;
    height: 130%;
    transform-origin: top center;
    transition: opacity 0.4s ease;
}

.business-detail:hover .business-icon {
    transform: scale(1.05);
}

.business-detail:hover .business-icon svg {
    opacity: 0.9;
}

.business-title-group {
    text-align: center;
    width: 100%;
}

.business-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 400;
    letter-spacing: -1px;
    margin-bottom: 8px;
    color: var(--text-primary);
    line-height: 1.3;
}

.business-tagline {
    font-size: 14px;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    font-weight: 400;
}

.business-content {
    padding-left: 88px;
}

.business-desc {
    font-size: 17px;
    line-height: 1.85;
    color: var(--text-secondary);
    margin-bottom: 48px;
    font-weight: 400;
}

.business-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: var(--bg-primary);
    border-radius: 12px;
    border: 1px solid var(--border-light);
    font-size: 15px;
    color: var(--text-secondary);
    font-weight: 400;
    transition: all 0.3s ease;
}

.feature-item:hover {
    color: var(--text-primary);
    border-color: var(--accent);
    background: var(--bg-tertiary);
    transform: translateX(4px);
}

.feature-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4);
    transition: all 0.3s ease;
}

.feature-item:hover .feature-dot {
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
    transform: scale(1.2);
}

/* 关于我们 */
.about {
    padding: 140px 0;
    background: var(--bg-secondary);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    margin-bottom: 80px;
}

.about-desc {
    font-size: 18px;
    line-height: 1.9;
    color: var(--text-secondary);
    margin-bottom: 0;
    font-weight: 400;
    text-align: left;
}

.about-stats {
    display: flex;
    gap: 120px;
    justify-content: center;
    padding-top: 60px;
    border-top: 1px solid var(--border-light);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: clamp(48px, 6vw, 64px);
    font-weight: 300;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -2px;
    line-height: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    letter-spacing: 1px;
    font-weight: 400;
}

/* 联系信息 */
.contact {
    padding: 140px 0;
    background: var(--bg-primary);
}

.contact-info {
    max-width: 700px;
    margin: 0 auto;
    background: var(--bg-secondary);
    padding: 60px;
    border-radius: 24px;
    border: 1px solid var(--border-light);
}

.contact-item {
    padding: 32px 0;
    border-bottom: 1px solid var(--border-light);
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 32px;
    align-items: center;
}

.contact-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.contact-label {
    font-size: 13px;
    color: var(--text-secondary);
    letter-spacing: 1px;
    font-weight: 500;
    text-transform: uppercase;
}

.contact-value {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-primary);
}

/* 页脚 */
.footer {
    padding: 60px 0;
    text-align: center;
    border-top: 1px solid var(--border-light);
    background: var(--bg-secondary);
}

.footer p {
    font-size: 12px;
    color: var(--text-tertiary);
    letter-spacing: 0.5px;
    font-weight: 400;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        padding: 0 50px;
    }
}

@media (max-width: 968px) {
    .container {
        padding: 0 40px;
    }

    .nav-menu {
        gap: 32px;
    }

    .business {
        padding: 100px 0;
    }

    .section-header {
        margin-bottom: 80px;
    }

    .business-detail {
        padding: 48px 40px;
        margin-bottom: 80px;
    }

    .business-detail-header {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 24px;
        margin-bottom: 32px;
        padding-bottom: 24px;
    }

    .business-icon {
        width: 56px;
        height: 73px;
    }
    
    .business-icon svg {
        width: 130%;
        height: 130%;
        transform-origin: top center;
    }
    
    .hero-business {
        gap: 24px;
        margin: 80px 0 80px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-business-item {
        padding: 0;
        flex: 0 1 auto;
        min-width: 80px;
    }
    
    .hero-business-icon {
        width: 48px;
        height: 62px;
    }
    
    .hero-business-icon svg {
        width: 130%;
        height: 130%;
        transform-origin: top center;
    }
    
    .hero-business-name {
        font-size: 13px;
    }

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

    .business-features {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .about {
        padding: 100px 0;
    }

    .about-stats {
        gap: 80px;
    }

    .contact {
        padding: 100px 0;
    }

    .contact-info {
        padding: 48px 40px;
    }

    .contact-item {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 24px 0;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 30px;
    }

    .nav-menu {
        gap: 24px;
    }

    .nav-menu a {
        font-size: 13px;
    }

    .hero {
        padding: 120px 0 80px;
    }

    .hero-title {
        font-size: 42px;
    }
    
    .hero-business {
        gap: 16px;
        margin: 60px 0 60px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-business-item {
        padding: 0;
        flex: 0 1 auto;
        min-width: 70px;
    }
    
    .hero-business-icon {
        width: 40px;
        height: 52px;
    }
    
    .hero-business-icon svg {
        width: 130%;
        height: 130%;
        transform-origin: top center;
    }
    
    .hero-business-name {
        font-size: 12px;
    }

    .business {
        padding: 80px 0;
    }

    .section-title {
        font-size: 36px;
    }

    .business-detail {
        padding: 40px 30px;
        margin-bottom: 60px;
    }

    .business-title {
        font-size: 28px;
    }

    .business-desc {
        font-size: 16px;
        margin-bottom: 36px;
    }

    .feature-item {
        padding: 14px 18px;
        font-size: 14px;
    }

    .about {
        padding: 80px 0;
    }

    .about-desc {
        font-size: 16px;
        text-align: center;
    }

    .about-stats {
        flex-direction: column;
        gap: 48px;
        padding-top: 48px;
    }

    .contact {
        padding: 80px 0;
    }

    .contact-info {
        padding: 40px 30px;
    }
}