/* ==================== 全局变量 ==================== */
:root {
    --primary: #1a6b5a;
    --primary-light: #2d9d83;
    --primary-dark: #0f4d3d;
    --secondary: #4ecdc4;
    --accent: #f7b731;
    --accent-dark: #e5a520;
    
    --text-dark: #1a1a1a;
    --text-medium: #4a4a4a;
    --text-light: #7a7a7a;
    --text-white: #ffffff;
    
    --bg-white: #ffffff;
    --bg-light: #f8fafa;
    --bg-section: #f0f7f5;
    --bg-dark: #0a2922;
    
    --gradient-primary: linear-gradient(135deg, #1a6b5a 0%, #2d9d83 100%);
    --gradient-hero: linear-gradient(135deg, #0a2922 0%, #1a6b5a 50%, #2d9d83 100%);
    
    --shadow-sm: 0 2px 10px rgba(0,0,0,0.05);
    --shadow-md: 0 5px 25px rgba(0,0,0,0.08);
    --shadow-lg: 0 15px 50px rgba(0,0,0,0.12);
    
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --container: 1280px;
}

/* ==================== 基础 ==================== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    background: var(--bg-white);
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 clamp(20px, 4vw, 40px); }
.section { padding: clamp(60px, 8vw, 100px) 0; }

/* ==================== 导航 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(26,107,90,0.08);
    transition: var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow-sm); }
.navbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo { display: flex; align-items: center; gap: 12px; }
.logo-icon {
    width: 45px; height: 45px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 1.3rem;
}
.logo-text { font-size: 1.1rem; font-weight: 700; color: var(--primary-dark); line-height: 1.2; }
.logo-text span { display: block; font-size: 0.75rem; font-weight: 400; color: var(--text-light); }
.logo-img {
    max-height: 50px;
    width: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
}
.logo:hover .logo-img {
    transform: scale(1.05);
}

.nav-menu { display: flex; gap: 5px; }
.nav-link {
    padding: 10px 18px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-medium);
    border-radius: 10px;
    transition: var(--transition);
    display: flex; align-items: center; gap: 6px;
}
.nav-link:hover { color: var(--primary); background: rgba(26,107,90,0.05); }
.nav-link.active { color: var(--primary); background: rgba(26,107,90,0.08); }

/* 多级菜单样式 */
.nav-dropdown {
    position: relative;
}
.nav-link.has-dropdown {
    position: relative;
}
.dropdown-arrow {
    font-size: 0.7rem;
    margin-left: 5px;
    transition: transform 0.3s ease;
}
.nav-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1000;
}
.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--text-medium);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
}
.dropdown-item:hover {
    background: rgba(26,107,90,0.05);
    color: var(--primary);
    padding-left: 25px;
}
.dropdown-item i {
    font-size: 0.85rem;
    width: 20px;
}

.nav-actions { display: flex; align-items: center; gap: 12px; }
.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 10px; background: none; border: none; cursor: pointer; }
.menu-toggle span { width: 25px; height: 2px; background: var(--primary); transition: var(--transition); }

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 24px; font-size: 0.95rem; font-weight: 600;
    border-radius: 50px; border: none; cursor: pointer; transition: var(--transition);
}
.btn-primary { background: var(--gradient-primary); color: white; box-shadow: 0 4px 15px rgba(26,107,90,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(26,107,90,0.4); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: white; }
.btn-outline-light { background: transparent; color: white; border: 2px solid rgba(255,255,255,0.5); }
.btn-outline-light:hover { background: white; color: var(--primary); }
.btn-accent { background: var(--accent); color: var(--text-dark); }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }
.btn-icon { width: 45px; height: 45px; padding: 0; border-radius: 12px; background: rgba(26,107,90,0.08); color: var(--primary); }
.btn-icon:hover { background: var(--primary); color: white; }

/* ==================== Hero ==================== */
.hero {
    min-height: 100vh;
    display: flex; align-items: center;
    background: var(--gradient-hero);
    position: relative; overflow: hidden;
    padding-top: 80px;
}
.hero-carousel { position: absolute; inset: 0; z-index: 0; }
.hero-overlay { position: absolute; inset: 0; background: rgba(10,41,34,0.65); z-index: 1; }
.carousel-slide {
    position: absolute; inset: 0;
    background-size: cover; background-position: center;
    opacity: 0; transition: opacity 1.2s ease;
}
.carousel-slide.active { opacity: 1; }
.carousel-btn {
    position: absolute; top: 50%; transform: translateY(-50%);
    background: rgba(255,255,255,0.15); backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    color: white; width: 50px; height: 50px; border-radius: 50%;
    cursor: pointer; z-index: 10; transition: var(--transition);
    display: flex; align-items: center; justify-content: center;
}
.carousel-btn:hover { background: rgba(255,255,255,0.25); }
.carousel-prev { left: 20px; }
.carousel-next { right: 20px; }
.carousel-dots {
    position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
    display: flex; gap: 10px; z-index: 10;
}
.carousel-dots .dot {
    width: 10px; height: 10px; border-radius: 50%;
    background: rgba(255,255,255,0.4); cursor: pointer;
    transition: var(--transition);
}
.carousel-dots .dot.active { background: var(--accent); transform: scale(1.2); }

.hero-content { position: relative; z-index: 2; text-align: center; max-width: 900px; margin: 0 auto; }
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 8px 20px;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50px;
    color: rgba(255,255,255,0.95); font-size: 0.9rem;
    margin-bottom: 30px;
    animation: fadeInUp 0.8s ease;
}
.hero-badge i { color: var(--accent); }
.hero-title {
    font-size: clamp(2.2rem, 6vw, 4rem);
    font-weight: 800; color: white;
    line-height: 1.15; margin-bottom: 25px;
    animation: fadeInUp 0.8s ease 0.1s backwards;
}
.hero-title .highlight {
    background: linear-gradient(135deg, var(--accent) 0%, #ff9f43 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-desc {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255,255,255,0.85);
    max-width: 700px; margin: 0 auto 40px;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}
.hero-actions {
    display: flex; gap: 15px; justify-content: center; flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.3s backwards;
}
.hero-stats {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 30px; margin-top: 80px; padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.1);
    animation: fadeInUp 0.8s ease 0.4s backwards;
}
.hero-stats .stat { text-align: center; }
.hero-stats .stat .num { font-size: 2.5rem; font-weight: 800; color: var(--accent); }
.hero-stats .stat p { font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-top: 5px; }

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==================== 通用区块头部 ==================== */
.section-header { text-align: center; margin-bottom: 60px; }
.label {
    display: inline-block; font-size: 0.85rem; font-weight: 600;
    color: var(--primary); text-transform: uppercase; letter-spacing: 2px;
    margin-bottom: 15px; position: relative;
}
.label::before, .label::after {
    content: ''; position: absolute; top: 50%; width: 30px; height: 2px;
    background: var(--primary); opacity: 0.3;
}
.label::before { right: calc(100% + 15px); }
.label::after { left: calc(100% + 15px); }
.label.light { color: var(--secondary); }
.label.light::before, .label.light::after { background: var(--secondary); }

.title { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 700; color: var(--text-dark); margin-bottom: 15px; line-height: 1.3; }
.title.light { color: white; }
.subtitle { font-size: 1.1rem; color: var(--text-light); max-width: 650px; margin: 0 auto; }
.subtitle.light { color: rgba(255,255,255,0.7); }
.text { font-size: 1rem; color: var(--text-medium); line-height: 1.9; margin-bottom: 15px; }
.text-center { text-align: center; }
.mt-50 { margin-top: 50px; }

/* ==================== ESG 理念 ==================== */
.esg-concept { background: var(--bg-white); }
.esg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.esg-card {
    position: relative; padding: 50px 35px;
    background: var(--bg-white);
    border-radius: 24px;
    border: 1px solid rgba(26,107,90,0.08);
    text-align: center; transition: var(--transition); overflow: hidden;
}
.esg-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: var(--gradient-primary); transform: scaleX(0); transition: var(--transition);
}
.esg-card:hover::before { transform: scaleX(1); }
.esg-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }

.esg-icon {
    width: 90px; height: 90px; margin: 0 auto 25px;
    border-radius: 24px; display: flex; align-items: center; justify-content: center;
    font-size: 2.5rem; transition: var(--transition);
}
.esg-card-e .esg-icon { background: linear-gradient(135deg, #e8f5e9, #c8e6c9); color: #2e7d32; }
.esg-card-s .esg-icon { background: linear-gradient(135deg, #e3f2fd, #bbdefb); color: #1565c0; }
.esg-card-g .esg-icon { background: linear-gradient(135deg, #fff3e0, #ffe0b2); color: #e65100; }
.esg-card:hover .esg-icon { transform: scale(1.1) rotate(5deg); }
.esg-card h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 15px; color: var(--text-dark); }
.esg-card h3 span { font-size: 0.85rem; font-weight: 500; color: var(--text-light); display: block; margin-top: 5px; }
.esg-card p { font-size: 0.95rem; color: var(--text-medium); line-height: 1.8; }

/* ==================== 关于我们 ==================== */
.about { background: var(--bg-section); }
.about-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-content { padding-right: 40px; }
.values-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 35px; }
.value-item {
    display: flex; align-items: flex-start; gap: 15px;
    padding: 20px; background: var(--bg-white);
    border-radius: 16px; transition: var(--transition);
}
.value-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.value-icon {
    width: 48px; height: 48px; flex-shrink: 0;
    background: rgba(26,107,90,0.08); border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    color: var(--primary); font-size: 1.2rem;
}
.value-text h4 { font-size: 1rem; font-weight: 600; color: var(--text-dark); margin-bottom: 5px; }
.value-text p { font-size: 0.85rem; color: var(--text-light); }

.about-visual { position: relative; }
.about-img { width: 100%; height: 500px; object-fit: cover; border-radius: 24px; box-shadow: var(--shadow-lg); }
.about-badge {
    position: absolute; bottom: -30px; left: -30px;
    background: var(--gradient-primary); color: white;
    padding: 25px 35px; border-radius: 20px; box-shadow: var(--shadow-lg);
}
.about-badge h4 { font-size: 2rem; font-weight: 800; line-height: 1; }
.about-badge p { font-size: 0.9rem; opacity: 0.9; }

/* ==================== 服务 ==================== */
.services { background: var(--bg-white); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; }
.service-card {
    background: var(--bg-white); border-radius: 20px;
    border: 1px solid rgba(26,107,90,0.08); overflow: hidden; transition: var(--transition);
}
.service-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service-header { padding: 30px; background: var(--bg-light); border-bottom: 1px solid rgba(26,107,90,0.05); }
.service-icon {
    width: 60px; height: 60px; background: var(--gradient-primary);
    border-radius: 16px; display: flex; align-items: center; justify-content: center;
    color: white; font-size: 1.5rem; margin-bottom: 20px; box-shadow: 0 8px 20px rgba(26,107,90,0.3);
}
.service-header h3 { font-size: 1.25rem; font-weight: 700; color: var(--text-dark); }
.service-body { padding: 30px; }
.service-list { display: flex; flex-direction: column; gap: 15px; }
.service-item { display: flex; align-items: flex-start; gap: 12px; font-size: 0.95rem; color: var(--text-medium); }
.service-item i { color: var(--primary); margin-top: 4px; }

/* ==================== 链睿 ==================== */
.rechain { background: var(--bg-dark); color: white; position: relative; overflow: hidden; }
.rechain::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(26,107,90,0.3) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(78,205,196,0.2) 0%, transparent 40%);
}
.rechain-intro { text-align: center; margin-bottom: 60px; position: relative; }
.rechain-intro h3 { font-size: 2rem; font-weight: 700; margin-bottom: 10px; }
.rechain-intro h3 span { color: var(--accent); }
.rechain-intro p { font-size: 1.1rem; color: rgba(255,255,255,0.7); font-style: italic; }

.rechain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; position: relative; }
.rechain-feature {
    background: rgba(255,255,255,0.05); backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 24px; padding: 40px 30px; transition: var(--transition);
}
.rechain-feature:hover { background: rgba(255,255,255,0.1); transform: translateY(-5px); }
.feature-icon {
    width: 70px; height: 70px;
    background: rgba(247,183,49,0.15); border-radius: 18px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.8rem; color: var(--accent); margin-bottom: 25px;
}
.rechain-feature h4 { font-size: 1.3rem; font-weight: 700; margin-bottom: 10px; color: white; }
.rechain-feature .subtitle { font-size: 0.9rem; color: var(--accent); margin-bottom: 20px; display: block; }
.feature-list { display: flex; flex-direction: column; gap: 12px; }
.feature-item { display: flex; align-items: flex-start; gap: 10px; font-size: 0.9rem; color: rgba(255,255,255,0.8); }
.feature-item i { color: var(--secondary); margin-top: 3px; }

/* ==================== 小程序模块 ==================== */
.modules { background: var(--bg-section); }
.modules-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.module-card {
    background: var(--bg-white); padding: 30px 20px;
    border-radius: 20px; text-align: center;
    transition: var(--transition); border: 1px solid transparent;
    position: relative; overflow: hidden;
}
.module-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--gradient-primary); transform: scaleX(0); transition: var(--transition);
}
.module-card:hover::before { transform: scaleX(1); }
.module-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.module-icon {
    width: 70px; height: 70px; margin: 0 auto 20px;
    background: var(--bg-light); border-radius: 18px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.8rem; color: var(--primary); transition: var(--transition);
}
.module-card:hover .module-icon { background: var(--gradient-primary); color: white; transform: scale(1.1); }
.module-card h4 { font-size: 1rem; font-weight: 600; color: var(--text-dark); line-height: 1.4; }
.module-badge {
    position: absolute; top: 15px; right: 15px;
    font-size: 0.7rem; padding: 4px 10px;
    background: var(--accent); color: white;
    border-radius: 20px; font-weight: 600;
}

/* ==================== 法总私董会 ==================== */
.dialogue { background: var(--bg-white); }
.dialogue-header { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 60px; }
.dialogue-text .text { margin-bottom: 25px; }
.dialogue-tags { display: flex; flex-wrap: wrap; gap: 15px; }
.tag-item {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 18px; background: var(--bg-light);
    border-radius: 50px; font-size: 0.9rem; color: var(--text-medium); transition: var(--transition);
}
.tag-item:hover { background: var(--primary); color: white; }
.tag-item i { color: var(--primary); }
.tag-item:hover i { color: white; }

.dialogue-visual { position: relative; }
.dialogue-visual img { width: 100%; height: 350px; object-fit: cover; border-radius: 24px; box-shadow: var(--shadow-lg); }
.dialogue-badge {
    position: absolute; bottom: -20px; right: -20px;
    background: var(--gradient-primary); color: white;
    padding: 20px 30px; border-radius: 16px; box-shadow: var(--shadow-lg);
}
.dialogue-badge h4 { font-size: 1.5rem; font-weight: 700; }
.dialogue-badge p { font-size: 0.85rem; opacity: 0.9; }

.experts-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; }
.expert-card {
    background: var(--bg-light); padding: 25px 20px;
    border-radius: 16px; transition: var(--transition);
    text-align: center;
}
.expert-card:hover { background: var(--bg-white); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.expert-avatar {
    width: 90px; height: 90px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 2rem; font-weight: 700;
    margin: 0 auto 15px;
    overflow: hidden;
    box-shadow: 0 6px 20px rgba(26,107,90,0.25);
    border: 3px solid white;
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-card h4 { font-size: 1.05rem; font-weight: 700; color: var(--text-dark); margin-bottom: 6px; }
.expert-org { font-size: 0.82rem; color: var(--primary); font-weight: 500; margin-bottom: 4px !important; }
.expert-card p { font-size: 0.82rem; color: var(--text-light); line-height: 1.5; }

/* ==================== 统计条 ==================== */
.stats-bar { background: var(--gradient-primary); padding: 80px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.stat-item { text-align: center; }
.stat-item h4 { font-size: 3.5rem; font-weight: 800; color: white; line-height: 1; margin-bottom: 10px; }
.stat-item h4 span { color: var(--accent); }
.stat-item p { font-size: 1rem; color: rgba(255,255,255,0.85); }

/* ==================== 页脚 ==================== */
.footer { background: var(--bg-dark); color: white; padding: 80px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 50px; margin-bottom: 50px; }
.footer-brand { padding-right: 40px; }
.footer-brand p { font-size: 0.95rem; color: rgba(255,255,255,0.7); line-height: 1.8; margin-top: 20px; }
.social-links { display: flex; gap: 12px; margin-top: 25px; }
.social-links a {
    width: 42px; height: 42px; background: rgba(255,255,255,0.08);
    border-radius: 12px; display: flex; align-items: center; justify-content: center;
    color: white; font-size: 1.1rem; transition: var(--transition);
}
.social-links a:hover { background: var(--primary); transform: translateY(-3px); }

.footer-col h4 { font-size: 1.1rem; font-weight: 600; margin-bottom: 25px; color: white; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { font-size: 0.9rem; color: rgba(255,255,255,0.7); transition: var(--transition); }
.footer-links a:hover { color: var(--secondary); padding-left: 5px; }
.footer-contact p { display: flex; align-items: flex-start; gap: 12px; font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-bottom: 15px; }
.footer-contact i { color: var(--secondary); margin-top: 3px; }
.footer-bottom { padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); }
.footer-bottom p { font-size: 0.85rem; color: rgba(255,255,255,0.5); }

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    .esg-grid, .services-grid, .rechain-grid { grid-template-columns: repeat(2, 1fr); }
    .modules-grid { grid-template-columns: repeat(3, 1fr); }
    .experts-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-menu { display: none; }
    .menu-toggle { display: flex; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .about-wrapper, .dialogue-header { grid-template-columns: 1fr; }
    .about-visual { order: -1; }
    .esg-grid, .services-grid, .rechain-grid { grid-template-columns: 1fr; }
    .modules-grid { grid-template-columns: repeat(2, 1fr); }
    .experts-grid { grid-template-columns: 1fr; }
    .values-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .footer-grid { grid-template-columns: 1fr; }
    .stat-item h4 { font-size: 2.5rem; }

    .nav-menu.active {
        display: flex; flex-direction: column;
        position: absolute; top: 100%; left: 0; right: 0;
        background: white; padding: 20px; box-shadow: var(--shadow-md);
        max-height: 70vh;
        overflow-y: auto;
    }

    /* 移动端多级菜单 */
    .nav-dropdown {
        position: static;
    }
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding-left: 20px;
        margin-top: 5px;
        display: none;
    }
    .nav-dropdown.open .dropdown-menu {
        display: block;
    }
    .dropdown-arrow {
        margin-left: auto;
    }
}

/* 快速导航组件 */
.quick-nav {
    position: fixed;
    right: 30px;
    bottom: 30px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.quick-nav-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: #1a6b5a;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(26, 107, 90, 0.3);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0;
    transform: translateY(20px);
}

.quick-nav-btn.show {
    opacity: 1;
    transform: translateY(0);
}

.quick-nav-btn:hover {
    background: #0f4d3d;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(26, 107, 90, 0.4);
}

.quick-nav-btn:active {
    transform: translateY(0);
}

.quick-nav-btn i {
    font-size: 1.2rem;
}

@media (max-width: 768px) {
    .quick-nav {
        right: 20px;
        bottom: 20px;
    }
    
    .quick-nav-btn {
        width: 45px;
        height: 45px;
    }
    
    .quick-nav-btn i {
        font-size: 1rem;
    }
}