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

:root {
    --bg-primary: #faf7f2;
    --bg-secondary: #f3efe8;
    --bg-card: #ffffff;
    --accent-sage: #7c9a7e;
    --accent-sage-dark: #5a7a5c;
    --accent-sage-light: #e8f0e6;
    --accent-terracotta: #c4815e;
    --accent-terracotta-light: #fbe8dd;
    --accent-terracotta-dark: #a86342;
    --accent-ochre: #d4a853;
    --accent-ochre-light: #fdf3dc;
    --text-primary: #3d3835;
    --text-secondary: #6b635e;
    --text-muted: #9a928c;
    --border-color: #e8e2da;
    --border-light: #f0ebe4;
    --shadow-sm: 0 1px 3px rgba(61, 56, 53, 0.04), 0 1px 2px rgba(61, 56, 53, 0.03);
    --shadow-md: 0 4px 20px rgba(61, 56, 53, 0.06), 0 1px 4px rgba(61, 56, 53, 0.04);
    --shadow-lg: 0 12px 40px rgba(61, 56, 53, 0.08), 0 3px 12px rgba(61, 56, 53, 0.04);
    --shadow-xl: 0 24px 64px rgba(61, 56, 53, 0.10), 0 6px 20px rgba(61, 56, 53, 0.05);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --radius-2xl: 28px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    overflow-x: hidden;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.section {
    padding: 80px 0;
}
.section:nth-child(even) {
    background: var(--bg-secondary);
}

/* ============ 导航 ============ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(250, 247, 242, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition);
}
.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    text-decoration: none;
    color: var(--text-primary);
    letter-spacing: -0.3px;
    transition: var(--transition);
}
.logo:hover {
    color: var(--accent-sage-dark);
}

.logo-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    background: linear-gradient(135deg, var(--accent-sage), var(--accent-sage-dark));
    color: #fff;
    font-weight: 800;
    box-shadow: 0 2px 8px rgba(124, 154, 126, 0.3);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}
.main-nav a {
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
    padding: 4px 0;
}
.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-sage);
    border-radius: 2px;
    transition: width 0.3s ease;
}
.main-nav a:hover {
    color: var(--accent-sage-dark);
}
.main-nav a:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 8px 20px;
    border-radius: 20px;
    color: #fff !important;
    font-weight: 600;
    background: var(--accent-terracotta);
    box-shadow: 0 2px 10px rgba(196, 129, 94, 0.25);
    transition: var(--transition);
}
.nav-cta:hover {
    background: var(--accent-terracotta-dark);
    box-shadow: 0 4px 16px rgba(196, 129, 94, 0.35);
    transform: translateY(-1px);
}
.nav-cta::after {
    display: none;
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    transition: var(--transition);
}
.menu-toggle:hover {
    background: var(--accent-sage-light);
}
.menu-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============ Hero ============ */
.hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(170deg, #faf7f2 0%, #f5f1e9 40%, #fdf8f3 100%);
}
.hero::before {
    content: '';
    position: absolute;
    top: -120px;
    right: -120px;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-sage-light) 0%, transparent 70%);
    z-index: 0;
    opacity: 0.7;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -80px;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-terracotta-light) 0%, transparent 70%);
    z-index: 0;
    opacity: 0.6;
}
.hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 720px;
}
.hero-eyebrow {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 5px 16px;
    border-radius: 20px;
    margin-bottom: 16px;
    background: var(--accent-terracotta-light);
    color: var(--accent-terracotta-dark);
    letter-spacing: 1px;
    text-transform: uppercase;
}
.hero h1 {
    font-size: 3rem;
    line-height: 1.15;
    margin-bottom: 20px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -1px;
}
.hero h1 .highlight {
    color: var(--accent-sage-dark);
    position: relative;
}
.hero h1 .highlight::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 8px;
    background: var(--accent-sage-light);
    border-radius: 4px;
    z-index: -1;
    opacity: 0.7;
}
.hero p {
    font-size: 1.1rem;
    opacity: 0.7;
    max-width: 560px;
    margin-bottom: 32px;
    color: var(--text-secondary);
    line-height: 1.7;
}
.hero-buttons {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}
.hero-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 4px solid #fff;
    position: relative;
}
.hero-image::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.6);
    pointer-events: none;
}
.hero-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* ============ 按钮 ============ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 30px;
    border-radius: 22px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
    letter-spacing: 0.2px;
    position: relative;
    overflow: hidden;
}
.btn:active {
    transform: scale(0.97);
}
.btn-primary {
    color: #fff;
    background: var(--accent-sage);
    box-shadow: 0 3px 14px rgba(124, 154, 126, 0.3);
}
.btn-primary:hover {
    background: var(--accent-sage-dark);
    box-shadow: 0 6px 22px rgba(124, 154, 126, 0.4);
    transform: translateY(-2px);
}
.btn-outline {
    background: transparent;
    border: 1.8px solid var(--accent-sage);
    color: var(--accent-sage-dark);
}
.btn-outline:hover {
    background: var(--accent-sage-light);
    border-color: var(--accent-sage-dark);
    transform: translateY(-2px);
}

/* ============ 标签/标题 ============ */
.section-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 2.5px;
    margin-bottom: 12px;
    color: var(--accent-terracotta);
    text-transform: uppercase;
}
.section-title {
    font-size: 2.2rem;
    margin-bottom: 14px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}
.section-desc {
    max-width: 600px;
    opacity: 0.7;
    margin-bottom: 40px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============ 卡片网格 ============ */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}
.category-card {
    border-radius: var(--radius-lg);
    padding: 30px 26px;
    border: 1.5px solid var(--border-light);
    transition: var(--transition);
    background: var(--bg-card);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}
.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-sage), var(--accent-terracotta));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}
.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.category-card:hover::before {
    transform: scaleX(1);
}
.card-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 1.4rem;
    background: var(--accent-sage-light);
    color: var(--accent-sage-dark);
    transition: var(--transition);
}
.category-card:hover .card-icon {
    background: var(--accent-sage);
    color: #fff;
    transform: rotate(-5deg) scale(1.05);
}
.category-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.category-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}
.card-link {
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    color: var(--accent-sage-dark);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap 0.3s ease;
}
.card-link:hover {
    gap: 8px;
    color: var(--accent-sage-dark);
}

/* ============ 特性块 ============ */
.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}
.feature-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 3px solid #fff;
    position: relative;
}
.feature-image::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.5);
    pointer-events: none;
}
.feature-image img {
    width: 100%;
    height: auto;
    display: block;
}
.feature-text h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}
.feature-text p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}
.feature-list {
    list-style: none;
}
.feature-list li {
    padding: 7px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}
.feature-list li::before {
    content: '✓';
    font-weight: 700;
    color: var(--accent-sage);
    font-size: 1rem;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-sage-light);
    border-radius: 50%;
    flex-shrink: 0;
}

/* ============ 数据条 ============ */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}
.stat-item {
    padding: 28px 20px;
    border-radius: var(--radius-lg);
    border: 1.5px solid var(--border-light);
    background: var(--bg-card);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.stat-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: var(--accent-terracotta);
    border-radius: 2px;
    opacity: 0;
    transition: var(--transition);
}
.stat-item:hover {
    box-shadow: var(--shadow-md);
    border-color: transparent;
    transform: translateY(-3px);
}
.stat-item:hover::after {
    opacity: 1;
    width: 60px;
}
.stat-number {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--accent-sage-dark);
    letter-spacing: -1px;
}
.stat-label {
    font-size: 0.9rem;
    opacity: 0.6;
    margin-top: 8px;
    color: var(--text-muted);
    font-weight: 500;
}

/* ============ 内容墙 ============ */
.content-wall {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.content-wall-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1.5px solid var(--border-light);
    transition: var(--transition);
    background: var(--bg-card);
    cursor: pointer;
}
.content-wall-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.content-wall-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.content-wall-item:hover img {
    transform: scale(1.04);
}
.content-wall-body {
    padding: 20px;
}
.content-wall-body h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}
.content-wall-body p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
}
.content-wall-body .tag {
    display: inline-block;
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 12px;
    background: var(--accent-ochre-light);
    color: var(--accent-ochre);
    margin-bottom: 8px;
    font-weight: 600;
}

/* ============ FAQ ============ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    overflow: hidden;
    cursor: pointer;
    background: var(--bg-card);
    transition: var(--transition);
}
.faq-item:hover {
    border-color: var(--accent-sage-light);
}
.faq-item .faq-question {
    padding: 18px 22px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
    user-select: none;
}
.faq-item .faq-question .arrow {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
    color: var(--accent-sage);
    font-size: 1.2rem;
}
.faq-item.open .faq-question .arrow {
    transform: rotate(180deg);
}
.faq-item .faq-answer {
    padding: 0 22px 18px;
    display: none;
    opacity: 0.7;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.93rem;
}
.faq-item.open .faq-answer {
    display: block;
    animation: faqFadeIn 0.3s ease;
}
.faq-item.open {
    border-color: var(--accent-sage-light);
    box-shadow: var(--shadow-sm);
}

@keyframes faqFadeIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 0.7; transform: translateY(0); }
}

/* ============ CTA横幅 ============ */
.cta-banner {
    padding: 60px 24px;
    text-align: center;
    border-radius: var(--radius-xl);
    color: #fff;
    background: linear-gradient(135deg, var(--accent-sage-dark), var(--accent-sage), #8ab88c);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.cta-banner::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
}
.cta-banner::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -60px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
}
.cta-banner .container {
    position: relative;
    z-index: 1;
}
.cta-banner h2 {
    color: #fff;
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}
.cta-banner p {
    color: rgba(255,255,255,0.85);
    margin-bottom: 28px;
    font-size: 1.05rem;
}
.cta-banner .btn-primary {
    background: #fff;
    color: var(--accent-sage-dark);
    box-shadow: 0 4px 18px rgba(0,0,0,0.1);
    font-weight: 700;
}
.cta-banner .btn-primary:hover {
    background: #fefefe;
    box-shadow: 0 8px 28px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}

/* ============ 页脚 ============ */
.site-footer {
    padding: 56px 0 28px;
    background: #f5f1ea;
    border-top: 1px solid var(--border-light);
}
.site-footer .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}
.footer-brand .logo-text {
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}
.footer-col h4 {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}
.footer-col a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.88rem;
    padding: 4px 0;
    transition: var(--transition);
}
.footer-col a:hover {
    color: var(--accent-sage-dark);
    padding-left: 4px;
}
.footer-bottom {
    border-top: 1px solid var(--border-light);
    margin-top: 40px;
    padding-top: 20px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ============ 工具类 ============ */
.text-accent {
    color: var(--accent-sage-dark);
}
.text-center {
    text-align: center;
}
.seo-description {
    max-width: 600px;
    margin: 0 auto 48px;
    opacity: 0.7;
    color: var(--text-secondary);
    line-height: 1.7;
}
.mt-0 {
    margin-top: 0;
}
.mb-0 {
    margin-bottom: 0;
}

/* ============ 响应式 ============ */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.4rem;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
    }
}

@media (max-width: 768px) {
    .feature-block {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    .main-nav {
        display: none;
    }
    .menu-toggle {
        display: flex;
    }
    .main-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 68px;
        left: 0;
        width: 100%;
        background: #faf7f2;
        padding: 20px 24px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-lg);
        gap: 4px;
    }
    .main-nav.open a {
        padding: 12px 8px;
        font-size: 1rem;
    }
    .main-nav.open .nav-cta {
        display: inline-block;
        text-align: center;
        margin-top: 8px;
    }
    .hero {
        min-height: auto;
        padding-top: 100px;
        padding-bottom: 50px;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .hero p {
        font-size: 1rem;
    }
    .hero-image {
        margin-top: 32px;
    }
    .section {
        padding: 50px 0;
    }
    .cta-banner h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .cards-grid,
    .content-wall,
    .stats-bar {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    .hero-buttons .btn {
        justify-content: center;
        text-align: center;
    }
    .hero h1 {
        font-size: 1.7rem;
    }
    .section-title {
        font-size: 1.5rem;
    }
    .stat-number {
        font-size: 1.8rem;
    }
    .container {
        padding: 0 16px;
    }
    .header-inner {
        padding: 0 16px;
    }
    .category-card {
        padding: 22px 18px;
    }
}