/* 共享样式 - 谷悦全邦官网 */

:root {
    --primary-green: #1b4332;
    --forest-green: #2d6a4f;
    --sage-green: #40916c;
    --light-green: #74c69d;
    --pale-green: #d8f3dc;
    --grain-gold: #d4a853;
    --warm-gold: #e6b84d;
    --wechat-green: #07c160;
    --wechat-dark: #06ad55;
    --cream: #f5f0e8;
    --dark: #1a1a1a;
    --text: #2d2d2d;
    --muted: #5a5a5a;
    --white: #ffffff;
    --shadow: 0 4px 20px rgba(27, 67, 50, 0.15);
    --shadow-lg: 0 8px 40px rgba(27, 67, 50, 0.2);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--cream);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

/* ==================== Hero 区域 ==================== */
.hero {
    padding: 140px 40px 100px;
    background: linear-gradient(135deg, var(--cream) 0%, var(--white) 50%, var(--pale-green) 100%);
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="rgba(27,67,50,0.03)"/></svg>');
    background-size: 50px 50px;
}
.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.hero-content { }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--white);
    padding: 10px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-green);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}
.hero-badge span {
    width: 8px; height: 8px;
    background: var(--grain-gold);
    border-radius: 50%;
    animation: pulse 2s infinite;
}
.hero-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 56px;
    font-weight: 900;
    color: var(--primary-green);
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: 2px;
}
.hero-title .highlight {
    color: var(--grain-gold);
    position: relative;
}
.hero-subtitle {
    font-size: 20px;
    color: var(--forest-green);
    font-weight: 600;
    margin-bottom: 16px;
}
.hero-desc {
    font-size: 17px;
    color: var(--muted);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 520px;
}
.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 50px;
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.stat-card {
    background: var(--white);
    border-radius: 16px;
    padding: 24px 16px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}
.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--light-green);
    box-shadow: var(--shadow-lg);
}
.stat-number {
    font-size: 28px;
    font-weight: 900;
    color: var(--primary-green);
    margin-bottom: 8px;
}
.stat-label {
    font-size: 13px;
    color: var(--muted);
    font-weight: 500;
}

/* Hero 视觉区域 */
.hero-visual {
    position: relative;
}
.hero-image-container {
    position: relative;
    width: 100%;
    max-width: 500px;
    margin-left: auto;
}
.grain-illustration {
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--pale-green), var(--light-green));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
.grain-circle {
    width: 70%;
    height: 70%;
    background: linear-gradient(135deg, var(--primary-green), var(--forest-green));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
}
.floating-badge {
    position: absolute;
    background: var(--white);
    border-radius: 16px;
    padding: 16px 20px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: float 4s ease-in-out infinite;
}
.floating-badge.top-right {
    top: 10%;
    right: -20px;
}
.floating-badge.bottom-left {
    bottom: 15%;
    left: -20px;
    animation-delay: 2s;
}
.floating-badge .icon {
    font-size: 32px;
}
.floating-badge .text {
    display: flex;
    flex-direction: column;
}
.floating-badge .text strong {
    font-size: 14px;
    color: var(--primary-green);
    font-weight: 700;
}
.floating-badge .text span {
    font-size: 12px;
    color: var(--muted);
}

/* 产品区域 */
.products-section {
    padding: 100px 40px;
    background: var(--white);
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}
.navbar.scrolled { background: var(--white); box-shadow: var(--shadow-lg); }

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex; align-items: center; justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex; align-items: center; gap: 12px;
    text-decoration: none;
}
.logo-icon {
    width: 48px; height: 48px;
    background: linear-gradient(135deg, var(--primary-green), var(--forest-green));
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; color: var(--white);
    position: relative; overflow: hidden;
}
.logo-icon::before {
    content: ''; position: absolute;
    width: 100%; height: 100%;
    background: url('images/logo.png') center/contain no-repeat;
    border-radius: 50%;
}
.logo-text {
    font-family: 'Noto Serif SC', serif;
    font-size: 24px; font-weight: 700;
    color: var(--primary-green); letter-spacing: 2px;
}

.nav-menu { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-item { position: relative; }
.nav-link {
    display: block; padding: 10px 18px;
    color: var(--text); text-decoration: none;
    font-size: 15px; font-weight: 500;
    border-radius: 8px; transition: all 0.3s ease;
}
.nav-link:hover { background: var(--pale-green); color: var(--primary-green); }
.nav-link.active { background: var(--primary-green); color: var(--white); }

/* 导航栏微信按钮 */
.nav-wechat {
    display: flex; align-items: center; gap: 6px;
    background: linear-gradient(135deg, var(--wechat-green), var(--wechat-dark));
    color: var(--white) !important;
    padding: 10px 20px !important;
    border-radius: 50px !important;
    font-weight: 600 !important;
    font-size: 14px !important;
    box-shadow: 0 4px 15px rgba(7,193,96,0.35);
    transition: all 0.3s ease !important;
    margin-left: 12px;
    cursor: pointer; border: none;
}
.nav-wechat:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(7,193,96,0.45) !important;
    background: var(--wechat-dark) !important;
}
.nav-wechat svg { width: 18px; height: 18px; }

/* ==================== 通用区块 ==================== */
.section-container { max-width: 1400px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
    display: inline-block;
    background: var(--pale-green); color: var(--primary-green);
    padding: 8px 20px; border-radius: 50px;
    font-size: 14px; font-weight: 600; margin-bottom: 20px;
}
.section-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 48px; font-weight: 700;
    color: var(--primary-green); margin-bottom: 16px;
}
.section-desc { font-size: 18px; color: var(--muted); max-width: 600px; margin: 0 auto; }

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 16px 36px; border-radius: 50px;
    font-size: 16px; font-weight: 600;
    text-decoration: none; transition: all 0.3s ease;
    cursor: pointer; border: none;
}
.btn-primary {
    background: linear-gradient(135deg, var(--grain-gold), var(--warm-gold));
    color: var(--primary-green);
    box-shadow: 0 6px 25px rgba(212,168,83,0.4);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 35px rgba(212,168,83,0.5); }
.btn-outline { background: transparent; color: var(--primary-green); border: 2px solid var(--primary-green); }
.btn-outline:hover { background: var(--primary-green); color: var(--white); }

/* 微信按钮 */
.btn-wechat {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 16px 36px; border-radius: 50px;
    font-size: 16px; font-weight: 700;
    background: linear-gradient(135deg, var(--wechat-green), var(--wechat-dark));
    color: var(--white);
    box-shadow: 0 6px 25px rgba(7,193,96,0.4);
    transition: all 0.3s ease;
    border: none; cursor: pointer; text-decoration: none;
}
.btn-wechat:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 35px rgba(7,193,96,0.5);
    background: linear-gradient(135deg, var(--wechat-dark), #059a3e);
}
.btn-wechat svg { width: 22px; height: 22px; }

/* ==================== 悬浮微信快捷按钮 ==================== */
.floating-wechat {
    position: fixed;
    bottom: 30px; right: 30px;
    z-index: 9999;
    display: flex; flex-direction: column; gap: 12px;
    align-items: center;
}
.floating-wechat-main {
    width: 64px; height: 64px;
    background: linear-gradient(135deg, var(--wechat-green), var(--wechat-dark));
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 6px 30px rgba(7,193,96,0.5);
    cursor: pointer;
    transition: all 0.3s ease;
    animation: wechatPulse 2s ease-in-out infinite;
    border: none;
}
.floating-wechat-main:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 40px rgba(7,193,96,0.6);
}
.floating-wechat-main svg { width: 36px; height: 36px; fill: var(--white); }

@keyframes wechatPulse {
    0%, 100% { box-shadow: 0 6px 30px rgba(7,193,96,0.5), 0 0 0 0 rgba(7,193,96,0.3); }
    50% { box-shadow: 0 6px 30px rgba(7,193,96,0.5), 0 0 0 15px rgba(7,193,96,0); }
}

.floating-wechat-popup {
    position: absolute;
    bottom: 75px; right: 0;
    background: var(--white);
    border-radius: 16px;
    padding: 24px;
    width: 280px;
    box-shadow: 0 10px 50px rgba(0,0,0,0.15);
    opacity: 0; visibility: hidden;
    transform: translateY(10px) scale(0.95);
    transition: all 0.3s ease;
    text-align: center;
}
.floating-wechat:hover .floating-wechat-popup,
.floating-wechat-main:focus + .floating-wechat-popup {
    opacity: 1; visibility: visible;
    transform: translateY(0) scale(1);
}
.floating-wechat-popup .popup-icon { font-size: 48px; margin-bottom: 12px; }
.floating-wechat-popup .popup-title { font-size: 18px; font-weight: 700; color: var(--primary-green); margin-bottom: 6px; }
.floating-wechat-popup .popup-number { font-size: 22px; font-weight: 700; color: var(--wechat-green); margin-bottom: 16px; letter-spacing: 2px; }
.floating-wechat-popup .popup-btn {
    display: block; width: 100%; padding: 12px;
    background: linear-gradient(135deg, var(--wechat-green), var(--wechat-dark));
    color: var(--white); border: none; border-radius: 10px;
    font-size: 15px; font-weight: 700; cursor: pointer;
    transition: all 0.3s ease;
}
.floating-wechat-popup .popup-btn:hover { background: var(--wechat-dark); transform: scale(1.02); }
.floating-wechat-popup .popup-tip { font-size: 12px; color: var(--muted); margin-top: 10px; }

.floating-wechat-badge {
    background: #ff4757;
    color: var(--white);
    font-size: 11px; font-weight: 700;
    padding: 2px 7px; border-radius: 50px;
    position: absolute; top: -4px; right: -4px;
}

/* ==================== 底部微信咨询横幅 ==================== */
.wechat-cta-banner {
    background: linear-gradient(135deg, var(--primary-green), var(--forest-green));
    padding: 80px 40px;
    text-align: center;
    position: relative; overflow: hidden;
}
.wechat-cta-banner::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1.5" fill="rgba(255,255,255,0.06)"/></svg>');
    background-size: 40px 40px;
}
.wechat-cta-content { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.wechat-cta-banner .section-tag { background: rgba(255,255,255,0.15); color: var(--white); }
.wechat-cta-banner .section-title { color: var(--white); font-size: 42px; }
.wechat-cta-banner .section-desc { color: rgba(255,255,255,0.85); margin-bottom: 40px; }
.wechat-cta-buttons { display: flex; align-items: center; justify-content: center; gap: 20px; flex-wrap: wrap; }
.wechat-cta-buttons .btn-wechat {
    padding: 18px 40px; font-size: 17px;
}
.wechat-cta-buttons .btn-outline-white {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 18px 40px; border-radius: 50px;
    font-size: 16px; font-weight: 600;
    color: var(--white); border: 2px solid rgba(255,255,255,0.5);
    text-decoration: none; transition: all 0.3s ease;
    background: transparent;
}
.wechat-cta-buttons .btn-outline-white:hover {
    background: rgba(255,255,255,0.15); border-color: var(--white);
}

/* 咨询卡片 */
.cta-contact-cards {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 20px; margin-top: 50px;
    max-width: 900px; margin-left: auto; margin-right: auto;
}
.cta-contact-card {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 16px; padding: 24px 20px;
    text-align: center;
    backdrop-filter: blur(10px);
}
.cta-contact-card .card-icon { font-size: 32px; margin-bottom: 10px; }
.cta-contact-card .card-label { font-size: 13px; color: rgba(255,255,255,0.7); margin-bottom: 4px; }
.cta-contact-card .card-value { font-size: 16px; font-weight: 700; color: var(--white); }

/* ==================== Footer ==================== */
.footer { background: var(--dark); color: rgba(255,255,255,0.8); padding: 80px 40px 40px; }
.footer-grid {
    max-width: 1400px; margin: 0 auto;
    display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px; margin-bottom: 60px;
}
.footer-brand .logo { margin-bottom: 20px; }
.footer-brand .logo-text { color: var(--white); }
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.7); }

.footer-title { font-size: 16px; font-weight: 600; color: var(--white); margin-bottom: 20px; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { color: rgba(255,255,255,0.7); text-decoration: none; font-size: 14px; transition: color 0.3s ease; }
.footer-links a:hover { color: var(--grain-gold); }

/* Footer 微信咨询区 */
.footer-wechat-section { }
.footer-wechat-card {
    background: linear-gradient(135deg, rgba(7,193,96,0.15), rgba(6,173,85,0.1));
    border: 1px solid rgba(7,193,96,0.3);
    border-radius: 16px; padding: 24px;
    margin-bottom: 20px;
}
.footer-wechat-card .fw-label { font-size: 13px; color: rgba(255,255,255,0.6); margin-bottom: 6px; }
.footer-wechat-card .fw-number { font-size: 22px; font-weight: 700; color: #4ade80; margin-bottom: 14px; letter-spacing: 2px; }
.footer-wechat-card .fw-btn {
    display: flex; align-items: center; justify-content: center; gap: 8px;
    width: 100%; padding: 12px;
    background: linear-gradient(135deg, var(--wechat-green), var(--wechat-dark));
    color: var(--white); border: none; border-radius: 10px;
    font-size: 15px; font-weight: 700; cursor: pointer;
    transition: all 0.3s ease; text-decoration: none;
}
.footer-wechat-card .fw-btn:hover { background: var(--wechat-dark); transform: scale(1.02); }
.footer-wechat-card .fw-btn svg { width: 18px; height: 18px; }

.footer-contact-item { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer-contact-item .fci-icon { font-size: 18px; }
.footer-contact-item .fci-text { font-size: 14px; color: rgba(255,255,255,0.7); }

.footer-bottom {
    max-width: 1400px; margin: 0 auto;
    padding-top: 40px; border-top: 1px solid rgba(255,255,255,0.1);
    display: flex; justify-content: space-between; align-items: center;
    font-size: 13px; color: rgba(255,255,255,0.5);
}

/* ==================== Toast ==================== */
.toast {
    position: fixed; top: 50%; left: 50%;
    transform: translate(-50%,-50%) scale(0.8);
    background: rgba(0,0,0,0.85); color: white;
    padding: 20px 36px; border-radius: 16px;
    font-size: 16px; font-weight: 600;
    z-index: 99999; opacity: 0;
    transition: all 0.3s ease; pointer-events: none;
    text-align: center; min-width: 280px;
}
.toast.show { opacity: 1; transform: translate(-50%,-50%) scale(1); }
.toast .toast-icon { font-size: 36px; margin-bottom: 10px; }
.toast .toast-text { line-height: 1.6; }

/* ==================== 动画 ==================== */
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-20px); } }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

/* ==================== 专家页面样式 ==================== */

/* 页面头部 */
.expert-hero {
    background: linear-gradient(135deg, var(--primary-green), var(--forest-green));
    padding: 140px 40px 100px;
    position: relative;
    overflow: hidden;
}
.expert-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: 50px 50px;
}
.expert-hero-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 60px;
    position: relative;
    z-index: 1;
}
.expert-photo {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    overflow: hidden;
    border: 6px solid rgba(255,255,255,0.3);
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    flex-shrink: 0;
}
.expert-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.expert-intro {
    flex: 1;
    color: var(--white);
}
.expert-badge {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}
.expert-name {
    font-family: 'Noto Serif SC', serif;
    font-size: 56px;
    font-weight: 900;
    margin-bottom: 16px;
    letter-spacing: 4px;
}
.expert-title {
    font-size: 18px;
    line-height: 1.8;
    opacity: 0.9;
    margin-bottom: 24px;
}
.expert-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.expert-tag {
    background: rgba(255,255,255,0.15);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    backdrop-filter: blur(10px);
}

/* 学术身份区块 */
.identity-section {
    padding: 100px 40px;
    background: var(--white);
}
.identity-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.identity-card {
    background: var(--cream);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
}
.identity-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}
.identity-icon {
    font-size: 48px;
    margin-bottom: 20px;
}
.identity-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-green);
    margin-bottom: 12px;
}
.identity-card p {
    font-size: 15px;
    color: var(--muted);
    line-height: 1.7;
}

/* 科研成果区块 */
.research-section {
    padding: 100px 40px;
    background: linear-gradient(180deg, var(--cream) 0%, var(--white) 100%);
}
.research-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}
.research-card {
    background: var(--white);
    border-radius: 20px;
    padding: 40px 25px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}
.research-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}
.research-number {
    font-size: 48px;
    font-weight: 900;
    color: var(--grain-gold);
    margin-bottom: 12px;
}
.research-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-green);
    margin-bottom: 10px;
}
.research-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
}

/* 核心项目区块 */
.project-section {
    padding: 100px 40px;
    background: var(--white);
}
.project-card {
    background: linear-gradient(135deg, var(--primary-green), var(--forest-green));
    border-radius: 24px;
    padding: 60px;
    color: var(--white);
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}
.project-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}
.project-badge {
    display: inline-block;
    background: var(--grain-gold);
    color: var(--primary-green);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 24px;
}
.project-card h3 {
    font-family: 'Noto Serif SC', serif;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
}
.project-card p {
    font-size: 17px;
    line-height: 1.8;
    opacity: 0.9;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}
.project-awards {
    display: flex;
    gap: 16px;
    margin-top: 30px;
    flex-wrap: wrap;
}
.project-award {
    background: rgba(255,255,255,0.2);
    padding: 10px 24px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    backdrop-filter: blur(10px);
}

/* 学术影响区块 */
.impact-section {
    padding: 100px 40px;
    background: linear-gradient(135deg, var(--cream), var(--white));
}
.impact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}
.impact-item {
    text-align: center;
    padding: 40px 20px;
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow);
}
.impact-number {
    font-size: 48px;
    font-weight: 900;
    color: var(--primary-green);
    margin-bottom: 10px;
}
.impact-label {
    font-size: 16px;
    color: var(--muted);
}

/* 返回按钮 */
.back-section {
    padding: 60px 40px;
    text-align: center;
    background: var(--cream);
}
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: var(--white);
    color: var(--primary-green);
    text-decoration: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}
.back-btn:hover {
    transform: translateX(-8px);
    box-shadow: var(--shadow-lg);
}

/* 合作案例区块 */
.cases-section {
    padding: 100px 40px;
    background: var(--white);
}
.cases-intro {
    text-align: center;
    font-size: 18px;
    color: var(--muted);
    max-width: 800px;
    margin: 0 auto 50px;
    line-height: 1.8;
}
.cases-table-wrapper {
    max-width: 1000px;
    margin: 0 auto;
    overflow-x: auto;
    border-radius: 16px;
    box-shadow: var(--shadow);
    background: var(--white);
}
.cases-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}
.cases-table thead {
    background: linear-gradient(135deg, var(--primary-green), var(--forest-green));
    color: var(--white);
}
.cases-table th {
    padding: 18px 20px;
    font-size: 15px;
    font-weight: 600;
    text-align: center;
}
.cases-table tbody tr {
    border-bottom: 1px solid rgba(27,67,50,0.08);
    transition: background 0.2s ease;
}
.cases-table tbody tr:hover {
    background: var(--pale-green);
}
.cases-table td {
    padding: 14px 20px;
    font-size: 14px;
    text-align: center;
    color: var(--text);
}
.cases-table tbody tr:nth-child(even) {
    background: rgba(216,243,220,0.2);
}
.cases-summary {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 50px;
    flex-wrap: wrap;
}
.summary-item {
    text-align: center;
    padding: 30px 50px;
    background: linear-gradient(135deg, var(--primary-green), var(--forest-green));
    border-radius: 16px;
    color: var(--white);
}
.summary-number {
    display: block;
    font-size: 42px;
    font-weight: 900;
    margin-bottom: 8px;
}
.summary-label {
    font-size: 15px;
    opacity: 0.9;
}

/* 响应式 - 专家页面 */
@media (max-width: 1024px) {
    .expert-hero-content {
        flex-direction: column;
        text-align: center;
    }
    .expert-photo {
        width: 200px;
        height: 200px;
    }
    .expert-tags {
        justify-content: center;
    }
    .identity-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .research-grid,
    .impact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 768px) {
    .expert-name {
        font-size: 40px;
    }
    .identity-grid,
    .research-grid,
    .impact-grid {
        grid-template-columns: 1fr;
    }
    .project-card {
        padding: 40px 30px;
    }
    .project-card h3 {
        font-size: 24px;
    }
    .cases-summary {
        gap: 20px;
    }
    .summary-item {
        padding: 20px 30px;
    }
    .summary-number {
        font-size: 32px;
    }
}

/* ==================== 响应式 ==================== */
@media (max-width: 1200px) {
    .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
    .cta-contact-cards { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
    .nav-menu { display: none; }
    .section-title { font-size: 36px; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
    .floating-wechat { bottom: 20px; right: 20px; }
    .floating-wechat-main { width: 56px; height: 56px; }
    .cta-contact-cards { grid-template-columns: 1fr; }
    .wechat-cta-buttons { flex-direction: column; }
    .wechat-cta-banner .section-title { font-size: 32px; }
}