:root {
    /* 自然森林配色方案 */
    --color-primary: #606c38;     /* 深橄榄绿 */
    --color-secondary: #283618;   /* 深森林绿 */
    --color-background: #fefae0;  /* 米白色 */
    --color-text: #283618;        /* 深森林绿用于文字 */
    --color-accent: #dda15e;      /* 温暖的橙褐色作为强调 */
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--color-background);
    color: var(--color-text);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header 样式 */
.header {
    background-color: var(--color-background);
    padding: 1.5rem 0;
    border-bottom: 1px solid rgba(40, 54, 24, 0.1);
}

.header__container {
    display: flex;
    align-items: center;
}

.header__brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--color-primary);
    gap: 0.75rem;
}

.header__logo {
    height: 2rem;
    width: auto;
}

.header__title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header {
        padding: 1rem 0;
    }

    .header__logo {
        height: 1.75rem;
    }

    .header__title {
        font-size: 1.25rem;
    }
}

/* Hero 部分样式 */
.hero {
    padding: 6rem 0;
    background-color: var(--color-background);
    overflow: hidden;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero__content {
    max-width: 600px;
}

.hero__title {
    font-size: 3.5rem;
    line-height: 1.2;
    color: var(--color-secondary);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.hero__subtitle {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--color-text);
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

.hero__cta {
    margin-top: 2rem;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-background);
}

.btn--primary:hover {
    background-color: var(--color-secondary);
    transform: translateY(-2px);
}

.hero__image {
    position: relative;
}

.hero__img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(40, 54, 24, 0.1);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero__title {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 4rem 0;
    }

    .hero__container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .hero__content {
        max-width: 100%;
    }

    .hero__title {
        font-size: 2.5rem;
    }

    .hero__subtitle {
        font-size: 1.125rem;
    }

    .hero__image {
        order: -1;
        margin-bottom: 2rem;
    }
}

.features {
    padding: 6rem 0;
    background-color: var(--color-background);
}

.features__title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--color-secondary);
    margin-bottom: 4rem;
}

.feature-row {
    margin-bottom: 4rem;
}

.feature-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(40, 54, 24, 0.1);
}

.feature-card:nth-child(even) {
    direction: rtl;
}

.feature-card__image {
    overflow: hidden;
    border-radius: 12px;
}

.feature-card__image img {
    width: 100%;
    height: auto;
    transition: transform 0.3s ease;
}

.feature-card__content {
    direction: ltr;
}

.feature-card__content h3 {
    font-size: 1.75rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.feature-card__content p {
    font-size: 1.125rem;
    line-height: 1.6;
    color: var(--color-text);
}

/* 响应式设计 */
@media (max-width: 968px) {
    .feature-card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .feature-card__image {
        margin-bottom: 2rem;
    }

    .features__title {
        font-size: 2rem;
    }
}

.seo-content {
    padding: 6rem 0;
    background-color: var(--color-background);
}

.seo-content__main {
    max-width: 800px;
    margin: 0 auto;
}

.seo-content h2 {
    font-size: 2.25rem;
    color: var(--color-secondary);
    margin: 3rem 0 1.5rem;
}

.seo-content h3 {
    font-size: 1.75rem;
    color: var(--color-primary);
    margin: 2rem 0 1rem;
}

.seo-content h4 {
    font-size: 1.25rem;
    color: var(--color-secondary);
    margin: 1.5rem 0 1rem;
}

.seo-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: 1.5rem;
}

.faq-section {
    margin: 2rem 0;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(40, 54, 24, 0.1);
}

.cta-section {
    margin-top: 4rem;
    text-align: center;
    padding: 3rem;
    background: var(--color-primary);
    color: white;
    border-radius: 16px;
}

.cta-section h3 {
    color: white;
}

.cta-section .btn--primary {
    background-color: white;
    color: var(--color-primary);
    margin-top: 2rem;
}

@media (max-width: 768px) {
    .seo-content h2 {
        font-size: 1.875rem;
    }

    .seo-content h3 {
        font-size: 1.5rem;
    }

    .seo-content h4 {
        font-size: 1.125rem;
    }

    .seo-content p {
        font-size: 1rem;
    }
}