:root {
    --primary-dark: #0A1926;
    --primary-deep: #123b4d;
    --accent-teal: #2B9A8A;
    --accent-coral: #F47B5A;
    --accent-gold: #E6B17E;
    --neutral-100: #F8FAFE;
    --neutral-200: #EFF2F9;
    --neutral-300: #DFE4EC;
    --neutral-600: #5A6874;
    --neutral-800: #1F2A3A;
    --neutral-900: #111827;
    --white: #ffffff;
    --black-light: #0B1620;
    --shadow-sm: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 20px 25px -12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 25px 40px -12px rgba(0, 0, 0, 0.15);
    --border-radius-card: 32px;
    --border-radius-sm: 20px;
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--white);
    color: var(--neutral-800);
    line-height: 1.5;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
}

/* 头部样式  ============================================ */
.main-header {
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(4px);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--neutral-200);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    padding-bottom: 16px;
}

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

.logo-icon {
    font-size: 28px;
    color: var(--accent-teal);
    background: rgba(43, 154, 138, 0.1);
    width: 48px;
    height: 48px;
    border-radius: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-deep) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.logo-tagline {
    font-size: 0.7rem;
    color: var(--neutral-600);
    letter-spacing: 0.3px;
}

.header-spacer {
    width: 20px;
}

/* Hero 区域 ============================================ */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background:url("../images/banner.webp") no-repeat center center;
    background-size: 100% auto;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(10, 25, 38, 0.55) 0%, rgba(18, 59, 77, 0.4) 100%);
    z-index: 2;
}

.hero-bg-multilayer {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.hero-bg-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center 30%;
    transition: transform 0.8s ease-out;
}

.hero-bg-img.img-1 {
    opacity: 0.65;
    z-index: 1;
    background-position: 50% 40%;
}
.hero-bg-img.img-2 {
    opacity: 0.5;
    z-index: 0;
    background-position: 30% 20%;
    mix-blend-mode: overlay;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 880px;
    margin: 0 auto;
    color: var(--white);
    padding: 40px 20px;
    animation: fadeUp 0.9s ease-out;
}

.hero-main-title {
    font-size: clamp(2.5rem, 6vw, 4.8rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    font-weight: 500;
    opacity: 0.92;
    margin-bottom: 40px;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    align-items: center;
    gap: 12px;
    padding: 14px 32px;
    border-radius: 60px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-smooth);
    cursor: pointer;
    text-decoration: none;
    border: 1px solid transparent;
    width: 200px;
    text-align: center;
}

.btn-primary {

    background: var(--accent-teal);
    color: white;
    box-shadow: 0 8px 18px rgba(43, 154, 138, 0.25);
}

.btn-primary:hover {
    background: #237f71;
    transform: translateY(-3px);
    box-shadow: 0 15px 25px -10px rgba(43, 154, 138, 0.4);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid rgba(255,255,255,0.7);
    color: white;
    backdrop-filter: blur(4px);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.12);
    border-color: white;
    transform: translateY(-3px);
}

/* 欢迎区域 ============================================ */
.welcome-section {
    padding: 80px 0 50px 0;
    background: var(--white);
}

.welcome-card {
    background: var(--neutral-100);
    border-radius: var(--border-radius-card);
    padding: 48px 48px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--neutral-200);
    transition: var(--transition-smooth);
}

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

.section-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(120deg, var(--primary-dark), var(--primary-deep));
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    margin-bottom: 28px;
    text-align: center;
}

.welcome-text {
    font-size: 1.12rem;
    line-height: 1.65;
    color: var(--neutral-800);
    text-align: center;
    max-width: 980px;
    margin: 0 auto;
}

/* 三大核心板块 ============================================ */
.insights-section {
    padding: 60px 0 90px;
    background: var(--neutral-100);
}

.insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
    gap: 32px;
    margin-top: 20px;
}

.insight-card {
    background: var(--white);
    border-radius: var(--border-radius-sm);
    padding: 40px 28px;
    transition: var(--transition-smooth);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.02);
    border: 1px solid var(--neutral-200);
    text-align: left;
    position: relative;
    overflow: hidden;
}

.insight-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(43, 154, 138, 0.2);
}

.card-icon {
    font-size: 2.8rem;
    color: var(--accent-teal);
    margin-bottom: 24px;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 32px;
    transition: var(--transition-smooth);
}


.insight-card h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.3px;
    color: var(--primary-dark);
}

.insight-card p {
    color: var(--neutral-600);
    line-height: 1.6;
    font-size: 1rem;
}

/* 联系区域 (完全按照要求, 类似aiheyou风格) ============================================ */
.contact-section {
    padding: 70px 0 80px;
    background: linear-gradient(140deg, #F8FBFF 0%, #F0F5FA 100%);
    position: relative;
}

.contact-wrapper {
    background: var(--white);
    border-radius: 48px;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-wrap: wrap;
    overflow: hidden;
    transition: all 0.2s;
}

.contact-info-panel {
    flex: 2;
    padding: 48px 48px 48px 52px;
    background: var(--white);
}

.contact-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
    border-bottom: 3px solid var(--accent-teal);
    display: inline-flex;
    padding-bottom: 8px;
}

.contact-header i {
    font-size: 2rem;
    color: var(--accent-teal);
}

.contact-header h2 {
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin: 0;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 28px;
    margin-top: 10px;
}

.detail-item {
    display: flex;
    gap: 18px;
    align-items: flex-start;
}

.detail-item i {
    font-size: 1.5rem;
    color: var(--accent-teal);
    min-width: 32px;
    margin-top: 4px;
}

.detail-text {
    font-size: 1rem;
    line-height: 1.55;
    color: var(--neutral-800);
}

.detail-text strong {
    font-weight: 700;
    color: var(--primary-dark);
    display: inline-block;
    margin-right: 6px;
}

.chinese-name {
    color: var(--neutral-600);
    font-size: 0.9rem;
    display: inline-block;
    margin-left: 6px;
}

.detail-text a {
    color: var(--accent-teal);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px dotted transparent;
    transition: var(--transition-smooth);
}

.detail-text a:hover {
    color: #1d6b5e;
    border-bottom-color: var(--accent-teal);
}

.contact-footer-note {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--neutral-200);
    font-size: 0.9rem;
    color: var(--accent-coral);
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.contact-visual {
    flex: 1;
    background: linear-gradient(145deg, #144a5e, #093141);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 20px;
    position: relative;
    color: white;
    text-align: center;
}

.map-graphic {
    position: relative;
    width: 130px;
    height: 130px;
    background: rgba(255,255,240,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px);
}

.map-graphic i {
    font-size: 3.5rem;
    color: var(--accent-gold);
    z-index: 2;
}

.map-pulse {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(230, 177, 126, 0.3);
    animation: pulseRing 2s infinite;
    z-index: 1;
}

.contact-visual p {
    font-weight: 500;
    font-size: 1.2rem;
    letter-spacing: -0.2px;
    max-width: 180px;
    line-height: 1.4;
}

/* Footer 页脚 ============================================ */
.main-footer {
    background-color: var(--neutral-900);
    color: #BBB;
    padding: 32px 0;
    font-size: 0.85rem;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-links {
    display: flex;
    gap: 18px;
    align-items: center;
}

.footer-links a {
    color: #CBD5E1;
    text-decoration: none;
    transition: color 0.2s;
}

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

.sep {
    color: #5a6e7a;
}

/* 动画定义 ============================================ */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulseRing {
    0% {
        transform: scale(0.95);
        opacity: 0.7;
    }
    70% {
        transform: scale(1.4);
        opacity: 0;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

/* 响应式设计 ============================================ */
@media (max-width: 992px) {
    .container {
        padding: 0 24px;
    }
    .contact-wrapper {
        flex-direction: column;
    }
    .contact-info-panel {
        padding: 40px 32px;
    }
    .contact-visual {
        padding: 48px 32px;
        min-height: 240px;
    }
    .insight-card h3 {
        font-size: 1.5rem;
    }
    .welcome-card {
        padding: 36px 28px;
    }
}

@media (max-width: 768px) {
    .hero-main-title {
        font-size: 2.3rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .btn {
        padding: 10px 24px;
        font-size: 0.9rem;
    }
    .section-title {
        font-size: 1.7rem;
    }
    .insights-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .detail-item {
        flex-direction: column;
        gap: 6px;
    }
    .detail-item i {
        margin-bottom: 4px;
    }
    .contact-header h2 {
        font-size: 1.6rem;
    }
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
    .logo-name {
        font-size: 1rem;
    }
    .logo-icon {
        width: 40px;
        height: 40px;
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
    .hero {
        min-height: 70vh;
    }
    .welcome-card {
        padding: 28px 20px;
    }
    .contact-info-panel {
        padding: 32px 24px;
    }
}

/* 辅助高亮: 确保轮廓及可访问性 */
a:focus-visible, button:focus-visible, .btn:focus-visible {
    outline: 3px solid var(--accent-teal);
    outline-offset: 2px;
}