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

:root {
    --primary: #2d5a3d;
    --primary-light: #4a7c59;
    --accent: #c17817;
    --text-dark: #1a1a1a;
    --text-gray: #666;
    --text-light: #999;
    --bg-light: #f8f7f4;
    --bg-white: #ffffff;
    --border: #e5e5e5;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    background: var(--bg-white);
    -webkit-font-smoothing: antialiased;
}

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

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 22px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-dark);
}

.logo img {
    height: 40px;
    width: auto;
}

.nav {
    display: flex;
    gap: 36px;
    list-style: none;
}

.nav a {
    font-size: 15px;
    color: var(--text-gray);
    transition: color 0.3s;
    position: relative;
}

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

.nav a.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary);
}

/* ===== Hero ===== */
.hero {
    position: relative;
    height: 520px;
    background: linear-gradient(135deg, #1a3a25 0%, #2d5a3d 50%, #4a7c59 100%);
    color: #fff;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 5L55 50H5L30 5z' fill='rgba(255,255,255,0.03)'/%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    width: 100%;
}

.hero h1 {
    font-size: 48px;
    font-weight: 300;
    letter-spacing: 8px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    opacity: 0.85;
    letter-spacing: 4px;
    margin-bottom: 36px;
}

.hero-btn {
    display: inline-block;
    padding: 14px 40px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: #fff;
    font-size: 15px;
    letter-spacing: 2px;
    transition: all 0.3s;
}

.hero-btn:hover {
    background: #fff;
    color: var(--primary);
}

/* ===== Section ===== */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 300;
    letter-spacing: 4px;
    margin-bottom: 12px;
}

.section-title p {
    color: var(--text-light);
    font-size: 14px;
    letter-spacing: 2px;
}

/* ===== Features ===== */
.features {
    background: var(--bg-light);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: var(--bg-white);
    padding: 40px 32px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--primary);
    border: 2px solid var(--primary);
    border-radius: 50%;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.8;
}

/* ===== About Preview ===== */
.about-preview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text h2 {
    font-size: 28px;
    font-weight: 300;
    letter-spacing: 3px;
    margin-bottom: 24px;
}

.about-text p {
    color: var(--text-gray);
    margin-bottom: 20px;
    font-size: 15px;
}

.about-text .more-link {
    display: inline-block;
    margin-top: 12px;
    color: var(--primary);
    font-size: 14px;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--primary);
    padding-bottom: 2px;
}

.about-image {
    height: 380px;
    background: linear-gradient(135deg, #e8ede4 0%, #d4ded0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-light);
    font-size: 60px;
    letter-spacing: 8px;
}

/* ===== Services Page ===== */
.services-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.service-item {
    padding: 40px;
    border: 1px solid var(--border);
    transition: border-color 0.3s;
}

.service-item:hover {
    border-color: var(--primary);
}

.service-item h3 {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.service-item .subtitle {
    color: var(--accent);
    font-size: 13px;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.service-item p {
    color: var(--text-gray);
    font-size: 14px;
    line-height: 1.8;
}

/* ===== About Page ===== */
.about-hero {
    background: var(--bg-light);
    padding: 100px 0;
    text-align: center;
}

.about-hero h1 {
    font-size: 36px;
    font-weight: 300;
    letter-spacing: 6px;
    margin-bottom: 16px;
}

.about-hero p {
    color: var(--text-gray);
    font-size: 16px;
    letter-spacing: 2px;
}

.about-content {
    max-width: 720px;
    margin: 0 auto;
    padding: 80px 24px;
}

.about-content h2 {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.about-content p {
    color: var(--text-gray);
    margin-bottom: 20px;
    font-size: 15px;
    line-height: 2;
}

.about-content blockquote {
    border-left: 3px solid var(--primary);
    padding-left: 20px;
    margin: 32px 0;
    color: var(--primary);
    font-size: 16px;
    line-height: 1.8;
    font-style: italic;
}

/* ===== Contact Page ===== */
.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-info h2 {
    font-size: 28px;
    font-weight: 300;
    letter-spacing: 3px;
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 28px;
}

.contact-item-icon {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    color: var(--primary);
    font-size: 18px;
    border-radius: 50%;
}

.contact-item h4 {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 4px;
    letter-spacing: 1px;
}

.contact-item p {
    font-size: 15px;
    color: var(--text-dark);
}

.contact-form {
    padding: 40px;
    background: var(--bg-light);
}

.contact-form h3 {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 24px;
    letter-spacing: 2px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-gray);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    background: var(--bg-white);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.submit-btn {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: #fff;
    border: none;
    font-size: 15px;
    letter-spacing: 2px;
    cursor: pointer;
    transition: background 0.3s;
}

.submit-btn:hover {
    background: var(--primary-light);
}

/* ===== Footer ===== */
.footer {
    background: #1a1a1a;
    color: #999;
    padding: 50px 0 24px;
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    color: #fff;
    font-size: 20px;
    font-weight: 500;
    letter-spacing: 3px;
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 13px;
    line-height: 1.8;
}

.footer-col h4 {
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.footer-col ul {
    list-style: none;
}

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

.footer-col a {
    font-size: 13px;
    color: #999;
    transition: color 0.3s;
}

.footer-col a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 24px;
    text-align: center;
    font-size: 12px;
}

.footer-bottom p {
    margin-bottom: 8px;
}

.footer-bottom .beian {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.footer-bottom .beian a {
    color: #666;
    transition: color 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.footer-bottom .beian a:hover {
    color: #999;
}

.footer-bottom .beian img {
    width: 14px;
    height: 14px;
    display: inline;
    vertical-align: middle;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
        letter-spacing: 4px;
    }

    .hero p {
        font-size: 15px;
        letter-spacing: 2px;
    }

    .feature-grid,
    .services-list {
        grid-template-columns: 1fr;
    }

    .about-preview,
    .contact-wrap {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .nav {
        gap: 20px;
    }

    .nav a {
        font-size: 14px;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .section {
        padding: 60px 0;
    }
}