/* 
* ============================================================
* 飞禽走兽网站 · 自然博物风格设计系统
* 设计理念：将自然界的灵动与秩序融入数字界面
* 配色灵感：晨雾森林（暖米白、森林绿、陶土橙、金盏黄）
* ============================================================
*/

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

body { 
    font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif; 
    overflow-x:hidden; 
    background-color: #F7F2EA;
    color: #3D3229;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* 选中高亮色 */
::selection {
    background: #2C6E49;
    color: #F7F2EA;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #EDE4D8;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb {
    background: #2C6E49;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #1F5236;
}

/* 核心布局 — 必须居中 */
.container { 
    max-width:1200px; 
    margin:0 auto; 
    padding:0 24px; 
}

.section { 
    padding:80px 0; 
    position: relative;
}
.section:nth-child(even) { 
    background:#EDE4D8; 
}

/* 装饰性自然元素 */
.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, #D4936D, #2C6E49, #D4936D, transparent);
    opacity: 0.3;
}

/* ============================================================
   导航 — 固定顶部 | 自然木纹质感
   ============================================================ */
.site-header { 
    position:fixed; 
    top:0; 
    left:0; 
    width:100%; 
    z-index:1000; 
    background:rgba(247, 242, 234, 0.92); 
    backdrop-filter:blur(16px) saturate(1.2); 
    border-bottom: 1px solid rgba(212, 147, 109, 0.2);
    box-shadow: 0 2px 30px rgba(44, 110, 73, 0.06);
}

.header-inner { 
    display:flex; 
    align-items:center; 
    justify-content:space-between; 
    height:72px; 
    max-width:1200px; 
    margin:0 auto; 
    padding:0 24px; 
}

.logo { 
    display:flex; 
    align-items:center; 
    gap:10px; 
    font-weight:700; 
    font-size:1.3rem; 
    text-decoration:none; 
    color:#2C6E49;
    letter-spacing: -0.3px;
    position: relative;
}

.logo::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #2C6E49, #D4936D);
    border-radius: 1px;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s ease;
}

.logo:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.logo-icon { 
    width:40px; 
    height:40px; 
    border-radius: 50%; 
    background: linear-gradient(135deg, #2C6E49, #4A7C59);
    display:flex; 
    align-items:center; 
    justify-content:center; 
    font-size:1.1rem;
    color: #F7F2EA;
    box-shadow: 0 2px 12px rgba(44, 110, 73, 0.25);
    position: relative;
    overflow: hidden;
}

.logo-icon::before {
    content: '🦅';
    font-size: 1.2rem;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,0.1));
}

.main-nav { 
    display:flex; 
    align-items:center; 
    gap:28px; 
    list-style:none; 
}

.main-nav a { 
    text-decoration:none; 
    font-size:0.88rem; 
    font-weight:500; 
    transition:0.3s; 
    color: #5A4A3C;
    letter-spacing: 0.3px;
    position: relative;
    padding: 4px 0;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #2C6E49;
    border-radius: 1px;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.main-nav a:hover {
    color: #2C6E49;
}

.main-nav a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-cta { 
    padding:10px 24px; 
    border-radius: 50px; 
    background: linear-gradient(135deg, #2C6E49, #4A7C59);
    color:#F7F2EA!important; 
    font-weight:600; 
    box-shadow: 0 4px 14px rgba(44, 110, 73, 0.25);
    transition: all 0.3s ease;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(44, 110, 73, 0.35);
    color: #fff !important;
}

.nav-cta::after {
    display: none !important;
}

.menu-toggle { 
    display:none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #2C6E49;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s;
}

.menu-toggle:hover {
    background: rgba(44, 110, 73, 0.08);
}

/* ============================================================
   首页Hero | 晨雾森林氛围
   ============================================================ */
.hero { 
    min-height:80vh; 
    display:flex; 
    align-items:center; 
    position: relative;
    background: linear-gradient(165deg, #F7F2EA 0%, #EDE4D8 40%, #E8DCCE 100%);
    overflow: hidden;
    padding-top: 72px;
}

/* 自然光晕装饰 */
.hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -20%;
    width: 60%;
    height: 80%;
    background: radial-gradient(ellipse at center, rgba(212, 147, 109, 0.12) 0%, rgba(44, 110, 73, 0.05) 50%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -10%;
    left: -10%;
    width: 50%;
    height: 60%;
    background: radial-gradient(ellipse at center, rgba(244, 196, 48, 0.08) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content { 
    max-width:680px; 
    position: relative;
    z-index: 1;
}

.hero-eyebrow { 
    display:inline-block; 
    font-size:0.78rem; 
    font-weight:600; 
    padding:6px 18px; 
    border-radius:50px; 
    margin-bottom:20px; 
    background: linear-gradient(135deg, rgba(44, 110, 73, 0.1), rgba(212, 147, 109, 0.1));
    color: #2C6E49;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    border: 1px solid rgba(44, 110, 73, 0.15);
    backdrop-filter: blur(4px);
}

.hero h1 { 
    font-size:3.2rem; 
    line-height:1.15; 
    margin-bottom:22px; 
    font-weight: 800;
    color: #2C3E2D;
    letter-spacing: -0.5px;
}

.hero h1 span {
    background: linear-gradient(135deg, #2C6E49, #D4936D);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p { 
    font-size:1.1rem; 
    opacity:0.75; 
    max-width:540px; 
    margin-bottom:36px; 
    color: #5A4A3C;
    line-height: 1.7;
}

.hero-buttons { 
    display:flex; 
    gap:16px; 
}

.hero-image { 
    border-radius:16px; 
    overflow:hidden; 
    box-shadow: 0 20px 60px rgba(44, 110, 73, 0.12);
    position: relative;
}

.hero-image::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.1);
    pointer-events: none;
}

.hero-image img { 
    width:100%; 
    height:auto; 
    display: block;
}

/* ============================================================
   按钮 | 自然质感
   ============================================================ */
.btn { 
    display:inline-flex; 
    align-items:center; 
    gap:10px; 
    padding:14px 32px; 
    border-radius:50px; 
    font-weight:600; 
    cursor:pointer; 
    border:none; 
    text-decoration:none; 
    transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94); 
    font-size: 0.95rem;
    letter-spacing: 0.3px;
}

.btn-primary { 
    background: linear-gradient(135deg, #2C6E49, #3D8A5A);
    color:#F7F2EA; 
    box-shadow: 0 4px 18px rgba(44, 110, 73, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(44, 110, 73, 0.4);
}

.btn-outline { 
    background:transparent; 
    border:2px solid #2C6E49; 
    color: #2C6E49;
}

.btn-outline:hover {
    background: rgba(44, 110, 73, 0.06);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(44, 110, 73, 0.12);
}

.btn-secondary {
    background: linear-gradient(135deg, #D4936D, #E8A87C);
    color: #F7F2EA;
    box-shadow: 0 4px 18px rgba(212, 147, 109, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(212, 147, 109, 0.4);
}

/* ============================================================
   标签/标题 | 自然排版层次
   ============================================================ */
.section-label { 
    display:inline-block; 
    font-size:0.75rem; 
    font-weight:700; 
    letter-spacing:3px; 
    margin-bottom:14px; 
    color: #D4936D;
    text-transform: uppercase;
    position: relative;
    padding-left: 36px;
}

.section-label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 24px;
    height: 2px;
    background: #D4936D;
    transform: translateY(-50%);
}

.section-title { 
    font-size:2.2rem; 
    margin-bottom:16px; 
    font-weight: 700;
    color: #2C3E2D;
    letter-spacing: -0.3px;
    line-height: 1.2;
}

.section-desc { 
    max-width:600px; 
    opacity:0.7; 
    margin-bottom:44px; 
    color: #5A4A3C;
    line-height: 1.7;
    font-size: 1.05rem;
}

/* ============================================================
   卡片网格 | 自然标本展示
   ============================================================ */
.cards-grid { 
    display:grid; 
    grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); 
    gap:28px; 
}

.category-card { 
    border-radius:16px; 
    padding:32px 28px; 
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(212, 147, 109, 0.12);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); 
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2C6E49, #D4936D, #F4C430);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.category-card:hover::before {
    opacity: 1;
}

.category-card:hover { 
    transform:translateY(-6px); 
    box-shadow:0 12px 40px rgba(44, 110, 73, 0.1); 
    border-color: rgba(44, 110, 73, 0.2);
    background: rgba(255,255,255,0.9);
}

.card-icon { 
    width:52px; 
    height:52px; 
    border-radius:14px; 
    display:flex; 
    align-items:center; 
    justify-content:center; 
    margin-bottom:18px; 
    font-size:1.5rem;
    background: linear-gradient(135deg, rgba(44, 110, 73, 0.08), rgba(212, 147, 109, 0.08));
    transition: transform 0.3s ease;
}

.category-card:hover .card-icon {
    transform: scale(1.05) rotate(-2deg);
}

.category-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: #2C3E2D;
    margin-bottom: 8px;
}

.category-card p {
    font-size: 0.92rem;
    color: #6B5B4D;
    opacity: 0.75;
    margin-bottom: 16px;
    line-height: 1.6;
}

.card-link { 
    font-weight:600; 
    font-size:0.85rem; 
    text-decoration:none; 
    color: #2C6E49;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.3s ease;
}

.card-link:hover {
    gap: 12px;
    color: #1F5236;
}

/* ============================================================
   特性块 | 自然与科技融合
   ============================================================ */
.feature-block { 
    display:grid; 
    grid-template-columns:1fr 1fr; 
    gap:64px; 
    align-items:center; 
}

.feature-image { 
    border-radius:16px; 
    overflow:hidden; 
    box-shadow: 0 16px 48px rgba(44, 110, 73, 0.1);
    position: relative;
}

.feature-image::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
    pointer-events: none;
}

.feature-image img { 
    width:100%; 
    height:auto; 
    display: block;
    transition: transform 0.6s ease;
}

.feature-block:hover .feature-image img {
    transform: scale(1.02);
}

.feature-text { 
    padding: 20px 0;
}

.feature-text h3 {
    font-size: 1.6rem;
    font-weight: 700;
    color: #2C3E2D;
    margin-bottom: 16px;
}

.feature-text p {
    color: #5A4A3C;
    opacity: 0.75;
    line-height: 1.7;
    margin-bottom: 20px;
}

.feature-list { 
    list-style:none; 
}

.feature-list li { 
    padding:8px 0; 
    display:flex; 
    align-items:center; 
    gap:12px; 
    font-size: 0.95rem;
    color: #3D3229;
}

.feature-list li::before { 
    content:'✓'; 
    font-weight:700; 
    color: #2C6E49;
    background: rgba(44, 110, 73, 0.1);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    flex-shrink: 0;
}

/* ============================================================
   数据条 | 自然力量
   ============================================================ */
.stats-bar { 
    display:grid; 
    grid-template-columns:repeat(4,1fr); 
    gap:28px; 
    text-align:center; 
}

.stat-item { 
    padding:28px 20px; 
    border-radius:16px; 
    background: rgba(255,255,255,0.6);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(212, 147, 109, 0.12);
    transition: all 0.3s ease;
}

.stat-item:hover {
    background: rgba(255,255,255,0.85);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(44, 110, 73, 0.08);
}

.stat-number { 
    font-size:2.6rem; 
    font-weight:800; 
    background: linear-gradient(135deg, #2C6E49, #D4936D);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.stat-label { 
    font-size:0.9rem; 
    opacity:0.6; 
    margin-top:8px; 
    color: #5A4A3C;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* ============================================================
   内容墙 | 自然画廊
   ============================================================ */
.content-wall { 
    display:grid; 
    grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); 
    gap:28px; 
}

.content-wall-item { 
    border-radius:16px; 
    overflow:hidden; 
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(212, 147, 109, 0.12);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); 
}

.content-wall-item:hover { 
    transform:translateY(-6px); 
    box-shadow:0 12px 40px rgba(44, 110, 73, 0.1); 
    border-color: rgba(44, 110, 73, 0.2);
}

.content-wall-item img { 
    width:100%; 
    height:220px; 
    object-fit:cover; 
    transition: transform 0.6s ease;
}

.content-wall-item:hover img {
    transform: scale(1.05);
}

.content-wall-body { 
    padding:24px; 
}

.content-wall-body h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #2C3E2D;
    margin-bottom: 8px;
}

.content-wall-body p {
    font-size: 0.9rem;
    color: #6B5B4D;
    opacity: 0.7;
    line-height: 1.6;
    margin-bottom: 12px;
}

.content-wall-body .card-link {
    font-size: 0.82rem;
}

/* ============================================================
   FAQ | 自然折叠
   ============================================================ */
.faq-list { 
    max-width:800px; 
    margin:0 auto; 
}

.faq-item { 
    border: 1px solid rgba(212, 147, 109, 0.15); 
    border-radius:12px; 
    margin-bottom:10px; 
    overflow:hidden; 
    cursor:pointer; 
    background: rgba(255,255,255,0.5);
    backdrop-filter: blur(4px);
    transition: all 0.3s ease;
}

.faq-item:hover {
    background: rgba(255,255,255,0.8);
    border-color: rgba(44, 110, 73, 0.2);
}

.faq-item .faq-question { 
    padding:18px 24px; 
    font-weight:600; 
    display:flex; 
    justify-content:space-between; 
    align-items: center;
    color: #2C3E2D;
    font-size: 1rem;
    transition: color 0.3s ease;
}

.faq-item .faq-question::after {
    content: '↓';
    font-size: 1.1rem;
    color: #D4936D;
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.faq-item.open .faq-question::after {
    transform: rotate(180deg);
}

.faq-item.open .faq-question {
    color: #2C6E49;
}

.faq-item .faq-answer { 
    padding:0 24px 20px; 
    display:none; 
    opacity:0.75; 
    color: #5A4A3C;
    line-height: 1.7;
    font-size: 0.95rem;
}

.faq-item.open .faq-answer { 
    display:block; 
    animation: fadeSlideIn 0.4s ease;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 0.75;
        transform: translateY(0);
    }
}

/* ============================================================
   CTA横幅 | 自然召唤
   ============================================================ */
.cta-banner { 
    padding:64px 40px; 
    text-align:center; 
    border-radius:20px; 
    background: linear-gradient(135deg, #2C6E49 0%, #3D8A5A 30%, #D4936D 100%);
    color:#F7F2EA; 
    position: relative;
    overflow: hidden;
    box-shadow: 0 16px 48px rgba(44, 110, 73, 0.2);
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 60%;
    height: 120%;
    background: radial-gradient(ellipse at center, rgba(244, 196, 48, 0.1) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
}

.cta-banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -20%;
    width: 50%;
    height: 80%;
    background: radial-gradient(ellipse at center, rgba(255,255,255,0.06) 0%, transparent 50%);
    border-radius: 50%;
    pointer-events: none;
}

.cta-banner h2 { 
    color: #F7F2EA; 
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.cta-banner p {
    color: rgba(247, 242, 234, 0.8);
    font-size: 1.05rem;
    margin-bottom: 28px;
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary { 
    background: #F7F2EA; 
    color: #2C6E49;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

/* ============================================================
   页脚 | 大地质感
   ============================================================ */
.site-footer { 
    padding:64px 0 32px; 
    background: #2C3E2D;
    color: rgba(247, 242, 234, 0.85);
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2C6E49, #D4936D, #F4C430, #D4936D, #2C6E49);
    opacity: 0.3;
}

.site-footer .container { }

.footer-grid { 
    display:grid; 
    grid-template-columns:2fr 1fr 1fr 1fr; 
    gap:48px; 
}

.footer-brand { 
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-brand .logo {
    color: #F7F2EA;
    font-size: 1.1rem;
}

.footer-brand .logo::after {
    background: linear-gradient(90deg, #D4936D, #F4C430);
}

.footer-brand .logo-icon {
    background: linear-gradient(135deg, #D4936D, #F4C430);
    box-shadow: 0 2px 12px rgba(212, 147, 109, 0.3);
}

.footer-brand .logo-icon::before {
    content: '🦅';
}

.footer-brand p {
    font-size: 0.9rem;
    opacity: 0.6;
    line-height: 1.7;
    max-width: 280px;
}

.footer-col { 
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: #F7F2EA;
    margin-bottom: 8px;
    letter-spacing: 1px;
    text-transform: uppercase;
    opacity: 0.8;
}

.footer-col a {
    color: rgba(247, 242, 234, 0.6);
    text-decoration: none;
    font-size: 0.88rem;
    transition: all 0.3s ease;
    padding: 2px 0;
}

.footer-col a:hover {
    color: #D4936D;
    padding-left: 4px;
}

.footer-bottom { 
    border-top: 1px solid rgba(247, 242, 234, 0.08); 
    margin-top:48px; 
    padding-top:24px; 
    text-align:center; 
    font-size:0.85rem; 
    opacity:0.5;
    color: rgba(247, 242, 234, 0.6);
}

/* ============================================================
   工具类
   ============================================================ */
.text-accent { 
    color: #D4936D;
}

.text-green {
    color: #2C6E49;
}

.text-gold {
    color: #F4C430;
}

.text-center { 
    text-align:center; 
}

.text-left {
    text-align: left;
}

.seo-description { 
    max-width:600px; 
    margin:0 auto 48px; 
    opacity:0.7; 
    color: #5A4A3C;
    line-height: 1.7;
}

.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }
.mt-2 { margin-top: 16px; }
.mb-2 { margin-bottom: 16px; }
.mt-4 { margin-top: 32px; }
.mb-4 { margin-bottom: 32px; }

/* ============================================================
   实用装饰元素
   ============================================================ */
.divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #2C6E49, #D4936D);
    border-radius: 2px;
    margin: 20px 0;
}

.divider-center {
    margin-left: auto;
    margin-right: auto;
}

.tag {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(44, 110, 73, 0.08);
    color: #2C6E49;
    letter-spacing: 0.5px;
}

.tag-orange {
    background: rgba(212, 147, 109, 0.12);
    color: #D4936D;
}

.tag-gold {
    background: rgba(244, 196, 48, 0.12);
    color: #B8941E;
}

/* 卡片上的自然光效 */
.glow-effect {
    position: relative;
}

.glow-effect::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(44, 110, 73, 0.1), rgba(212, 147, 109, 0.1));
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.glow-effect:hover::after {
    opacity: 1;
}

/* ============================================================
   响应式设计
   ============================================================ */
@media (max-width: 1024px) {
    .hero h1 {
        font-size: 2.6rem;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .footer-grid {
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .feature-block { 
        grid-template-columns:1fr; 
        gap: 40px;
    }
    
    .stats-bar { 
        grid-template-columns:repeat(2,1fr); 
    }
    
    .footer-grid { 
        grid-template-columns:1fr 1fr; 
        gap: 28px;
    }
    
    .main-nav { 
        display:none; 
    }
    
    .menu-toggle { 
        display:flex; 
        align-items: center;
        justify-content: center;
    }
    
    .main-nav.open { 
        display:flex; 
        flex-direction:column; 
        position:absolute; 
        top:72px; 
        left:0; 
        width:100%; 
        background: rgba(247, 242, 234, 0.98);
        backdrop-filter: blur(16px);
        padding:24px 28px; 
        gap: 16px;
        box-shadow: 0 16px 40px rgba(44, 110, 73, 0.08);
        border-bottom: 1px solid rgba(212, 147, 109, 0.15);
    }
    
    .main-nav.open a {
        font-size: 1rem;
        padding: 8px 0;
    }
    
    .hero {
        min-height: 60vh;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }
    
    .section {
        padding: 56px 0;
    }
    
    .cta-banner {
        padding: 48px 24px;
        border-radius: 16px;
    }
    
    .cta-banner h2 {
        font-size: 1.6rem;
    }
    
    .content-wall {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
    
    .cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

@media (max-width: 480px) {
    .cards-grid,
    .content-wall,
    .stats-bar { 
        grid-template-columns:1fr; 
    }
    
    .footer-grid { 
        grid-template-columns:1fr; 
        gap: 24px;
    }
    
    .hero-buttons { 
        flex-direction:column; 
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .header-inner {
        height: 64px;
    }
    
    .main-nav.open {
        top: 64px;
    }
    
    .section {
        padding: 40px 0;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .cta-banner {
        padding: 36px 20px;
    }
    
    .cta-banner h2 {
        font-size: 1.4rem;
    }
}

/* ============================================================
   动效增强
   ============================================================ */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.float-animation {
    animation: float 4s ease-in-out infinite;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* 悬停卡片统一效果 */
.hover-lift {
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 36px rgba(44, 110, 73, 0.08);
}

/* 渐变文字 */
.gradient-text {
    background: linear-gradient(135deg, #2C6E49, #D4936D);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 边框装饰 */
.border-accent {
    border: 1px solid rgba(44, 110, 73, 0.15);
    border-radius: 16px;
}

/* 背景纹理点缀 */
.bg-texture {
    background-image: radial-gradient(rgba(44, 110, 73, 0.03) 1px, transparent 1px);
    background-size: 20px 20px;
}