/*
  全站基础样式
  色彩系统：
  科技绿：#2E8B57 / #3CB371
  大地灰：#6A6A6A / #8B8B7A
  活力黄绿：#9ACD32
  纯净白：#FFFFFF
  辅助：#F5F5F5, #333333
*/

:root {
    --color-tech-green: #2E8B57;
    --color-tech-green-soft: #3CB371;
    --color-earth-gray: #6A6A6A;
    --color-earth-gray-soft: #8B8B7A;
    --color-highlight: #9ACD32;
    --color-bg: #FFFFFF;
    --color-bg-soft: #F5F5F5;
    --color-text-main: #333333;
    --color-text-light: #888888;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.08);
    --radius-lg: 18px;
    --radius-md: 12px;
    --radius-sm: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: radial-gradient(circle at top, rgba(46, 139, 87, 0.05), transparent), #ffffff;
    color: var(--color-text-main);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover {
    color: var(--color-tech-green-soft);
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(16px);
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

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

.logo-mark {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-tech-green), var(--color-tech-green-soft));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 16px;
    box-shadow: 0 10px 20px rgba(46, 139, 87, 0.35);
}

.logo-text .site-name {
    font-weight: 600;
    font-size: 16px;
}

.logo-text .site-subtitle {
    font-size: 12px;
    color: var(--color-text-light);
}

.main-nav {
    display: flex;
    gap: 24px;
    font-size: 14px;
}

.main-nav a {
    position: relative;
    padding-bottom: 4px;
    color: #555;
}

.main-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-tech-green), var(--color-highlight));
    transition: width 0.25s ease;
}

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

.hero-section {
    padding: 72px 0 72px;
}

.hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 40px;
    align-items: center;
}

.hero-text h1 {
    font-size: 36px;
    line-height: 1.2;
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 15px;
    color: var(--color-text-light);
    max-width: 460px;
    margin-bottom: 24px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 22px;
    background: linear-gradient(135deg, var(--color-tech-green), var(--color-tech-green-soft));
    color: #fff;
    border-radius: 999px;
    font-size: 14px;
    border: none;
    cursor: pointer;
    box-shadow: 0 10px 24px rgba(46, 139, 87, 0.35);
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 30px rgba(46, 139, 87, 0.45);
}

.btn-primary.full {
    width: 100%;
}

.hero-visual {
    display: flex;
    justify-content: flex-end;
}

.hero-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    background: radial-gradient(circle at top left, rgba(46, 139, 87, 0.12), rgba(255, 255, 255, 0.95));
    border-radius: var(--radius-lg);
    padding: 18px;
    box-shadow: var(--shadow-soft);
}

.grid-item {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    font-size: 13px;
    color: var(--color-earth-gray);
    border: 1px solid rgba(46, 139, 87, 0.08);
    backdrop-filter: blur(10px);
}

.grid-item.large {
    grid-column: span 2;
    font-weight: 600;
    color: var(--color-tech-green);
}

.section {
    padding: 64px 0;
}

.section-light {
    background: var(--color-bg-soft);
}

.section-title {
    font-size: 24px;
    margin-bottom: 10px;
}

.section-desc {
    font-size: 14px;
    color: var(--color-text-light);
    max-width: 640px;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin-top: 28px;
}

.card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 18px 18px 20px;
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.card h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.card p {
    font-size: 14px;
    color: var(--color-text-light);
}

.timeline {
    margin-top: 28px;
    border-left: 2px solid rgba(46, 139, 87, 0.18);
    padding-left: 18px;
}

.timeline-item {
    position: relative;
    margin-bottom: 18px;
}

.timeline-item .dot {
    position: absolute;
    left: -10px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--color-tech-green);
}

.timeline-item h3 {
    font-size: 15px;
    margin-bottom: 4px;
}

.timeline-item p {
    font-size: 13px;
    color: var(--color-text-light);
}

.contact-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 40px;
}

.contact-list {
    list-style: none;
    margin-top: 16px;
    font-size: 14px;
    color: var(--color-text-light);
}

.contact-list li + li {
    margin-top: 6px;
}

.contact-list span {
    color: var(--color-earth-gray);
    margin-right: 4px;
}

.contact-form-wrapper {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 22px 22px 24px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    font-size: 13px;
    margin-bottom: 4px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 8px 10px;
    font-size: 14px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(0, 0, 0, 0.12);
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-tech-green-soft);
    box-shadow: 0 0 0 1px rgba(46, 139, 87, 0.2);
}

.alert {
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 12px;
}

.alert.success {
    background: rgba(46, 139, 87, 0.06);
    color: var(--color-tech-green);
}

.alert.error {
    background: rgba(255, 90, 90, 0.06);
    color: #d64545;
}

.site-footer {
    padding: 20px 0 26px;
    background: #fafafa;
    border-top: 1px solid rgba(0, 0, 0, 0.04);
    margin-top: 40px;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: #999;
}

.footer-right span {
    color: var(--color-earth-gray-soft);
}

.icp {
    margin-top: 2px;
}

@media (max-width: 960px) {
    .hero-inner,
    .contact-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .hero-visual {
        justify-content: flex-start;
    }
}

@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        height: auto;
        padding: 10px 0;
        gap: 8px;
    }

    .main-nav {
        gap: 18px;
        font-size: 13px;
    }

    .hero-section {
        padding: 48px 0 52px;
    }

    .hero-text h1 {
        font-size: 26px;
    }
}