/* ==================== 官网全局样式变量 ==================== */
:root {
    --primary: #4A90E2;
    --primary-dark: #2076BF;
    --primary-light: #6BA3E8;
    --primary-bg: rgba(74,144,226,0.06);
    
    --secondary: #6C5CE7;
    --success: #00B894;
    --warning: #FDCB6E;
    --danger: #E17055;
    --info: #74B9FF;

    --text-primary: #1A1A2E;
    --text-secondary: #555770;
    --text-muted: #9999AD;
    
    --bg-white: #FFFFFF;
    --bg-light: #F5F7FA;
    --bg-dark: #0D1117;
    --bg-section-alt: #FAFBFF;

    --border-light: #EEF0F5;
    --border-color: #DDDDE5;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 50%;

    --shadow-xs: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-sm: 0 4px 16px rgba(0,0,0,0.07);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.14);
    --shadow-glow: 0 0 40px rgba(74,144,226,0.20);

    --font-sans: -apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;

    --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
    --transition-fast: 0.15s ease;
}

/* ==================== Reset ==================== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; font-size: 16px; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-sans); color: var(--text-primary); line-height: 1.7; background: var(--bg-white); overflow-x: hidden; }
a { color: inherit; text-decoration: none; transition: var(--transition-fast); }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; font-size: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; }

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

.section { padding: 100px 0; position: relative; }
.section:nth-child(even) { background: var(--bg-section-alt); }

.section-header { text-align: center; max-width: 700px; margin: 0 auto 60px; }
.section-tag { display: inline-block; padding: 6px 18px; background: var(--primary-bg); color: var(--primary); border-radius: 30px; font-size: 13px; font-weight: 600; letter-spacing: 0.5px; margin-bottom: 16px; }
.section-title { font-size: clamp(28px, 4vw, 42px); font-weight: 800; line-height: 1.25; color: var(--text-primary); margin-bottom: 16px; letter-spacing: -0.5px; }
.section-desc { font-size: 17px; color: var(--text-secondary); line-height: 1.7; }

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hide-mobile { display: block; }
@media(max-width:768px){ .hide-mobile{display:none;} }

/* 按钮系统 */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 28px; border-radius: var(--radius-sm); font-weight: 600; font-size: 15px;
    transition: all var(--transition); position: relative; overflow: hidden;
}
.btn-sm { padding: 8px 20px; font-size: 13px; }
.btn-lg { padding: 16px 36px; font-size: 16px; }
.btn-block { width: 100%; }

.btn-primary { background: linear-gradient(135deg,var(--primary),var(--primary-dark)); color: white; box-shadow: 0 4px 15px rgba(74,144,226,0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(74,144,226,0.45); }

.btn-outline { border: 2px solid var(--border-color); color: var(--text-secondary); background: white; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.btn-white { background: white; color: var(--primary); }
.btn-white:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

.btn-white-outline { border: 2px solid rgba(255,255,255,0.5); color: white; background: transparent; }
.btn-white-outline:hover { background: rgba(255,255,255,0.15); border-color: white; }
.btn-white-outline-lg { padding: 16px 36px; font-size: 16px; font-weight: 600; border-radius: var(--radius-sm); border: 2px solid rgba(255,255,255,0.5); color: white; background: transparent; transition: all var(--transition); }
.btn-white-outline-lg:hover { background: rgba(255,255,255,0.15); border-color: white; }

/* ==================== 导航栏 ==================== */
.site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.92); backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: all var(--transition);
}
.site-header.scrolled {
    background: rgba(255,255,255,0.98); box-shadow: var(--shadow-sm);
}

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

.header-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-img { width: 40px; height: 40px; border-radius: 10px; object-fit: contain; }
.logo-text { font-size: 20px; font-weight: 800; color: var(--text-primary); letter-spacing: 0.5px; }

.main-nav { display: flex; align-items: center; }
.nav-list { display: flex; gap: 4px; }
.nav-link {
    padding: 8px 16px; font-size: 15px; font-weight: 500; color: var(--text-secondary);
    border-radius: var(--radius-sm); transition: var(--transition-fast);
}
.nav-link:hover, .nav-link.active { color: var(--primary); background: var(--primary-bg); }

.header-actions { display: flex; align-items: center; gap: 12px; }
.mobile-menu-btn { display: none; width: 40px; height: 40px; flex-direction: column; align-items: center; justify-content: center; gap: 5px; }
.mobile-menu-btn span { display: block; width: 22px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }

/* 移动端导航 */
.mobile-nav-overlay {
    position: fixed; inset: 0; z-index: 1999; background: rgba(0,0,0,0.5);
    opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.mobile-nav-overlay.show { opacity: 1; pointer-events: auto; }

.mobile-nav {
    position: fixed; top: 0; right: -320px; width: 300px; height: 100vh; z-index: 2000;
    background: white; transition: right 0.35s cubic-bezier(0.4,0,0.2,1);
    box-shadow: var(--shadow-lg); overflow-y: auto;
}
.mobile-nav.open { right: 0; }

.mobile-nav-header {
    display: flex; align-items: center; gap: 12px; padding: 24px 24px 16px;
    border-bottom: 1px solid var(--border-light); font-weight: 700; font-size: 17px;
}
.mobile-nav-list { padding: 16px 0; }
.mobile-nav-link {
    display: block; padding: 13px 24px; font-size: 16px; font-weight: 500; color: var(--text-secondary);
    border-left: 3px solid transparent; transition: var(--transition-fast);
}
.mobile-nav-link:hover { color: var(--primary); border-left-color: var(--primary); background: var(--primary-bg); }
.mobile-nav-actions { padding: 16px 24px 32px; display: flex; flex-direction: column; gap: 10px; }

@media (max-width: 900px) {
    .main-nav { display: none; }
    .header-actions a:not(.mobile-menu-btn) { display: none; }
    .mobile-menu-btn { display: flex; }
    .header-actions { gap: 8px; }
}

/* ==================== Hero 主视觉 ==================== */
.hero-section {
    min-height: 100vh; display: flex; align-items: center;
    padding-top: 72px; position: relative; overflow: hidden;
    background: linear-gradient(165deg, #f0f4ff 0%, #e8eeff 40%, #faf5ff 100%);
}
.hero-bg-shapes { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.shape {
    position: absolute; border-radius: 50%;
}
.shape-1 { width: 500px; height: 500px; top: -120px; right: -80px; background: radial-gradient(circle,rgba(74,144,226,0.12),transparent 70%); }
.shape-2 { width: 350px; height: 350px; bottom: -60px; left: -80px; background: radial-gradient(circle,rgba(108,92,231,0.10),transparent 70%); }
.shape-3 { width: 200px; height: 200px; top: 40%; left: 45%; background: radial-gradient(circle,rgba(0,184,148,0.08),transparent 70%); }

.hero-content {
    display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
    max-width: 1200px; margin: 0 auto; padding: 0 24px 60px;
}

.hero-badge {
    display: inline-block; padding: 8px 20px; background: white;
    border-radius: 30px; font-size: 14px; font-weight: 600; color: var(--primary);
    box-shadow: var(--shadow-sm); margin-bottom: 28px; animation: float 3s ease-in-out infinite;
}
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }

.hero-title {
    font-size: clamp(36px,5vw,56px); font-weight: 900; line-height: 1.15; letter-spacing: -1.5px; margin-bottom: 24px;
}

.hero-desc {
    font-size: 18px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 36px; max-width: 520px;
}
.highlight-num {
    color: var(--primary); font-weight: 800; font-size: 1.15em;
}

.hero-actions { display: flex; gap: 16px; margin-bottom: 44px; flex-wrap: wrap; }
.btn-arrow { font-size: 18px; transition: transform 0.2s; }
.btn:hover .btn-arrow { transform: translateX(4px); }

.hero-trust {
    display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.trust-label { font-size: 14px; color: var(--text-muted); }
.trust-companies { display: flex; flex-direction: column; }
.trust-companies .trust-num { font-size: 26px; font-weight: 800; color: var(--text-primary); line-height: 1; }
.trust-companies span:last-child { font-size: 13px; color: var(--text-secondary); }
.trust-sep { width: 1px; height: 36px; background: var(--border-color); }
.trust-logos { display: flex; gap: 12px; flex-wrap: wrap; }
.mini-logo {
    padding: 5px 12px; background: white; border-radius: var(--radius-sm);
    font-size: 12px; font-weight: 600; color: var(--text-muted);
    box-shadow: var(--shadow-xs);
}

/* Hero 右侧视觉 */
.hero-visual { position: relative; }
.dashboard-mockup {
    background: white; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
    overflow: hidden; border: 1px solid var(--border-light);
}
.mockup-header {
    display: flex; align-items: center; gap: 10px; padding: 14px 20px;
    background: #F8F9FB; border-bottom: 1px solid var(--border-light);
}
.mockup-dots { display: flex; gap: 5px; }
.mockup-dots span { width: 9px; height: 9px; border-radius: 50%; }
.mockup-dots span:nth-child(1){background:#FF5F57;}
.mockup-dots span:nth-child(2){background:#FEBC2E;}
.mockup-dots span:nth-child(3){background:#28C840;}
.mockup-title { font-size: 12px; color: var(--text-muted); font-weight: 500; }

.mockup-body { display: flex; padding: 16px; gap: 12px; min-height: 340px; }
.mockup-sidebar { width: 52px; display: flex; flex-direction: column; gap: 8px; }
.mockup-nav-item { height: 32px; border-radius: 6px; background: #F0F2F5; }
.mockup-nav-item.active { background: var(--primary); opacity: 0.85; }

.mockup-main { flex: 1; display: flex; flex-direction: column; gap: 12px; }
.mockup-stats-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 8px; }
.mockup-stat-card {
    background: var(--bg-light); border-radius: 8px; padding: 12px;
}
.ms-line { height: 10px; background: #DDE2EA; border-radius: 4px; }
.ms-box { height: 8px; background: #E8ECF2; border-radius: 4px; }
.w60 { width: 60%; } .w50 { width: 50%; } .w55 { width: 55%; } .w65 { width: 65%; }
.w40 { width: 40%; } .w45 { width: 45%; } .w35 { width: 35%; } .w30 { width: 30%; }
.h16 { height: 16px; } .mt8 { margin-top: 8px; }

.c1 .ms-line { background: rgba(74,144,226,0.3); }
.c2 .ms-line { background: rgba(46,204,113,0.3); }
.c3 .ms-line { background: rgba(243,156,18,0.3); }
.c4 .ms-line { background: rgba(155,89,182,0.3); }

.mockup-chart-area {
    background: var(--bg-light); border-radius: 8px; padding: 16px 12px; flex: 1;
}
.chart-bars { display: flex; align-items: end; gap: 8px; height: 100%; }
.cb-bar {
    flex: 1; border-radius: 4px 4px 0 0;
    background: linear-gradient(to top, var(--primary), var(--primary-light));
    min-height: 10%;
    transition: height 0.5s ease;
}

.mockup-table-area { display: flex; flex-direction: column; gap: 8px; }
.table-row {
    display: flex; align-items: center; gap: 10px; padding: 10px 12px;
    background: var(--bg-light); border-radius: 8px;
}
.tc-avatar { width: 30px; height: 30px; border-radius: 50%; background: #DDE2EA; flex-shrink: 0; }
.tc-lines { flex: 1; display: flex; flex-direction: column; gap: 4px; }
.tl { height: 8px; background: #E8ECF2; border-radius: 4px; }
.tl.s { width: 55% !important; height: 6px; }
.w30 { width: 30%; } .w25 { width: 25%; } .w35 { width: 35%; } .w22 { width: 22%; } .w20 { width: 20%; }
.tc-badge { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.tc-badge.green { background: var(--success); }
.tc-badge.blue { background: var(--info); }
.tc-badge.orange { background: var(--warning); }

/* 浮动卡片 */
.floating-card {
    position: absolute; background: white; border-radius: var(--radius-md);
    padding: 14px 20px; box-shadow: var(--shadow-md); display: flex; align-items: center; gap: 10px;
    font-size: 14px; animation: floatCard 3s ease-in-out infinite; z-index: 2;
}
.card-a { bottom: 30%; left: -30px; animation-delay: 0s; }
.card-b { bottom: 10%; right: -20px; animation-delay: 1.5s; }
.fc-icon { font-size: 22px; }
.fc-text strong { color: var(--success); font-weight: 700; }

@keyframes floatCard {
    0%,100%{transform:translateY(0)}
    50%{transform:translateY(-10px)}
}

@media (max-width: 1024px) {
    .hero-content { grid-template-columns: 1fr; text-align: center; }
    .hero-desc { margin-left: auto; margin-right: auto; }
    .hero-actions { justify-content: center; }
    .hero-trust { justify-content: center; }
    .hero-visual { max-width: 580px; margin: 0 auto; }
    .floating-card { display: none; }
}

/* ==================== 合作伙伴展示条 ==================== */
.partner-strip {
    padding: 40px 0; background: white; border-bottom: 1px solid var(--border-light);
}
.partner-label { text-align: center; font-size: 14px; color: var(--text-muted); margin-bottom: 20px; }
.partner-logos {
    display: flex; justify-content: center; align-items: center; gap: 32px;
    flex-wrap: wrap; max-width: 900px; margin: 0 auto;
}
.partner-item {
    font-size: 16px; font-weight: 700; color: var(--text-muted); opacity: 0.5;
    transition: var(--transition); letter-spacing: 0.5px;
}
.partner-item:hover { opacity: 1; color: var(--text-primary); }

/* ==================== 产品功能 ==================== */
.products-grid {
    display: grid; grid-template-columns: repeat(3,1fr); gap: 24px;
}
.product-card {
    background: white; border-radius: var(--radius-md); padding: 32px 28px;
    border: 1px solid var(--border-light); transition: all var(--transition);
    position: relative; overflow: hidden;
}
.product-card::before {
    content:''; position:absolute; top:0;left:0;right:0;height:3px;
    background: var(--pc-color, var(--primary));
    transform: scaleX(0); transition: transform 0.3s ease;
    transform-origin: left;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.product-card:hover::before { transform: scaleX(1); }

.product-icon-wrap {
    width: 64px; height: 64px; border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--pc-color, var(--primary)), transparent);
    margin-bottom: 20px;
}
.product-icon { font-size: 28px; }
.product-name { font-size: 19px; font-weight: 700; margin-bottom: 10px; color: var(--text-primary); }
.product-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.product-features { margin-bottom: 20px; }
.product-features li {
    padding: 5px 0; padding-left: 20px; font-size: 14px; color: var(--text-secondary);
    position: relative;
}
.product-features li::before {
    content:'✓'; position:absolute; left:0; color: var(--success); font-weight: 700; font-size: 13px;
}
.product-link {
    font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 4px;
}
.product-link:hover { gap: 8px; }

@media (max-width: 900px) {
    .products-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 600px) {
    .products-grid { grid-template-columns: 1fr; }
}

/* ==================== 解决方案 ==================== */
.solution-tabs { }
.solution-tabs-nav {
    display: flex; justify-content: center; gap: 8px; margin-bottom: 40px;
    flex-wrap: wrap;
}
.solution-tab {
    padding: 10px 24px; border-radius: 30px; font-size: 15px; font-weight: 600;
    color: var(--text-secondary); background: white; border: 2px solid var(--border-light);
    transition: all var(--transition); cursor: pointer;
}
.solution-tab:hover { border-color: var(--primary); color: var(--primary); }
.solution-tab.active { background: var(--primary); color: white; border-color: var(--primary); }

.solution-panel { display: none; }
.solution-panel.active { display: block; animation: fadeInUp 0.4s ease; }

.solution-content {
    display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 48px;
    background: white; border-radius: var(--radius-lg); padding: 48px;
    box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
}
.solution-info h3 { font-size: 26px; font-weight: 800; margin-bottom: 12px; }
.solution-info > p { font-size: 16px; color: var(--text-secondary); margin-bottom: 28px; line-height: 1.7; }

.solution-points { display: flex; flex-direction: column; gap: 18px; }
.sp-item { display: flex; gap: 16px; align-items: flex-start; }
.sp-num {
    font-size: 28px; font-weight: 900; color: var(--primary-bg);
    line-height: 1; -webkit-text-stroke: 1.5px var(--primary); flex-shrink: 0;
}
.sp-item div { display: flex; flex-direction: column; gap: 2px; }
.sp-item strong { font-size: 16px; font-weight: 700; }
.sp-item span { font-size: 14px; color: var(--text-secondary); }

.solution-stats {
    display: flex; flex-direction: column; justify-content: center; gap: 28px;
    background: var(--bg-light); border-radius: var(--radius-md); padding: 32px 24px;
}
.ss-item { text-align: center; }
.ss-value { font-size: 38px; font-weight: 900; color: var(--primary); display: block; line-height: 1.1; }
.ss-label { font-size: 14px; color: var(--text-secondary); margin-top: 4px; display: block; }

@media (max-width: 900px) {
    .solution-content { grid-template-columns: 1fr; padding: 32px 24px; }
    .solution-stats { flex-direction: row; flex-wrap: wrap; justify-content: space-around; }
}

/* ==================== 数据成就展示 ==================== */
/* ==================== 数据成就展示 ==================== */
.stats-showcase {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 80px 0;
    position: relative;
}
.stats-showcase::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(74,144,226,0.15) 0%, transparent 70%);
    pointer-events: none;
}
.stats-showcase .section-desc,
.stats-showcase .section-tag { display: none; }
.stats-showcase .section-header { margin-bottom: 56px; }
.stats-showcase .section-title {
    color: #FFFFFF;
    text-align: center;
    font-size: 36px;
    margin-bottom: 12px;
    text-shadow: 0 2px 20px rgba(74,144,226,0.3);
}
.stats-showcase .section-desc-new {
    color: rgba(255,255,255,0.6);
    text-align: center;
    font-size: 16px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 24px;
    max-width: 960px;
    margin: 0 auto;
}
.stat-item {
    text-align: center;
    color: white;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 36px 16px 28px;
    transition: all 0.3s ease;
}
.stat-item:hover {
    background: rgba(255,255,255,0.12);
    border-color: rgba(74,144,226,0.5);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(74,144,226,0.2);
}
.stat-number-wrap {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin-bottom: 12px;
}
.stat-number {
    font-size: 56px;
    font-weight: 900;
    line-height: 1;
    background: linear-gradient(135deg, #74B9FF, #A29BFE);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-suffix {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, #74B9FF, #A29BFE);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-left: 2px;
}
.stat-label {
    font-size: 15px;
    color: rgba(255,255,255,0.65);
    font-weight: 500;
    letter-spacing: 1px;
}

@media (max-width: 768px) {
    .stats-grid { grid-template-columns: repeat(2,1fr); gap: 16px; }
    .stat-number { font-size: 40px; }
    .stat-suffix { font-size: 24px; }
    .stats-showcase .section-title { font-size: 28px; }
}

/* ==================== 客户案例 ==================== */
.cases-grid {
    display: grid; grid-template-columns: repeat(3,1fr); gap: 24px;
}
.case-card {
    background: white; border-radius: var(--radius-md); padding: 28px;
    border: 1px solid var(--border-light); transition: all var(--transition);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.case-header { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.case-company-logo {
    width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
    color: white; font-weight: 800; font-size: 18px; flex-shrink: 0;
}
.case-company { font-size: 17px; font-weight: 700; }
.case-industry { font-size: 13px; color: var(--text-muted); }

.case-quote {
    font-size: 15px; color: var(--text-secondary); line-height: 1.75;
    border-left: 3px solid var(--primary); padding-left: 18px; margin-bottom: 18px;
    font-style: italic;
}

.case-meta { display: flex; flex-direction: column; gap: 10px; }
.case-person { font-size: 14px; color: var(--text-muted); }
.case-results { display: flex; gap: 12px; flex-wrap: wrap; }
.case-results span {
    font-size: 13px; font-weight: 600; color: var(--success);
    background: rgba(0,184,148,0.08); padding: 4px 12px; border-radius: 20px;
}

@media (max-width: 900px) {
    .cases-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 600px) {
    .cases-grid { grid-template-columns: 1fr; }
}

/* ==================== 关于我们 ==================== */
.about-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start;
}
.about-desc { font-size: 16px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }
.about-values { margin-top: 28px; display: flex; flex-direction: column; gap: 18px; }
.value-item { display: flex; gap: 14px; align-items: flex-start; }
.value-icon { font-size: 28px; flex-shrink: 0; }
.value-item strong { font-size: 15px; font-weight: 700; display: block; }
.value-item span { font-size: 14px; color: var(--text-secondary); }

.about-image-grid { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: auto auto; gap: 12px; }
.img-placeholder {
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
    padding: 28px; background: var(--bg-light); border-radius: var(--radius-md);
    font-size: 13px; color: var(--text-muted); text-align: center;
}
.img-icon { font-size: 36px; }
.img-1 { grid-column: 1 / -1; }
.img-placeholder:hover { background: var(--primary-bg); }

.certifications {
    display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap;
}
.cert-item {
    padding: 8px 18px; background: var(--bg-light); border-radius: 30px;
    font-size: 13px; font-weight: 600; color: var(--text-secondary);
    border: 1px solid var(--border-light);
}

@media (max-width: 900px) {
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
}

/* ==================== CTA 行动召唤 ==================== */
.cta-section {
    position: relative; padding: 100px 0; overflow: hidden; text-align: center;
}
.cta-bg {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}
.cta-content { position: relative; z-index: 1; }
.cta-title { font-size: clamp(28px,4vw,44px); font-weight: 900; color: white; margin-bottom: 16px; }
.cta-desc { font-size: 18px; color: rgba(255,255,255,0.85); margin-bottom: 36px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.cta-note { font-size: 15px; color: rgba(255,255,255,0.7); }
.cta-note strong { color: white; }

/* ==================== 联系我们 ==================== */
.contact-grid {
    display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 40px; align-items: start;
}

.contact-form {
    background: white; border-radius: var(--radius-lg); padding: 40px;
    box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 20px; }
.form-group.full-width { grid-column: 1 / -1; }
.form-group label {
    display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary);
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%; padding: 12px 16px; border: 2px solid var(--border-color);
    border-radius: var(--radius-sm); font-size: 14px; transition: var(--transition);
    background: var(--bg-white);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(74,144,226,0.1);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.btn-submit { padding: 14px; margin-top: 8px; font-size: 16px; }

.contact-info-cards { display: flex; flex-direction: column; gap: 16px; }
.contact-card {
    background: white; border-radius: var(--radius-md); padding: 24px;
    border: 1px solid var(--border-light); transition: all var(--transition);
}
.contact-card:hover { transform: translateX(4px); box-shadow: var(--shadow-sm); }
.cc-icon { font-size: 28px; margin-bottom: 10px; }
.contact-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.contact-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

@media (max-width: 900px) {
    .contact-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
}

/* ==================== 页脚 ==================== */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,0.65); }
.footer-main {
    display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr; gap: 40px;
    padding: 64px 24px 48px;
}
.footer-logo-img { width: 44px; height: 44px; border-radius: 10px; margin-bottom: 16px; }
.footer-brand-desc { font-size: 14px; line-height: 1.75; margin-bottom: 20px; color: rgba(255,255,255,0.45); }
.footer-social { display: flex; gap: 8px; }
.footer-social a {
    width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.08);
    display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 600;
    transition: var(--transition);
}
.footer-social a:hover { background: var(--primary); color: white; }

.footer-heading { font-size: 15px; font-weight: 700; color: white; margin-bottom: 20px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.5); }
.footer-links a:hover { color: white; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0;
}
.footer-bottom-inner {
    display: flex; justify-content: space-between; align-items: center;
    font-size: 13px; flex-wrap: wrap; gap: 12px;
}
.footer-bottom-inner a { color: rgba(255,255,255,0.45); }
.footer-bottom-inner a:hover { color: white; }
.footer-badges { display: flex; gap: 16px; }
.footer-badges span { font-size: 12px; opacity: 0.5; }

@media (max-width: 900px) {
    .footer-main { grid-template-columns: 1fr 1fr; gap: 32px; }
    .brand-col { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
    .footer-main { grid-template-columns: 1fr; }
    .footer-bottom-inner { flex-direction: column; text-align: center; }
}

/* ==================== 回到顶部 ==================== */
.back-to-top {
    position: fixed; bottom: 30px; right: 30px; z-index: 99;
    width: 46px; height: 46px; border-radius: 50%;
    background: var(--primary); color: white; font-size: 22px; font-weight: bold;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transform: translateY(20px);
    transition: all var(--transition); box-shadow: var(--shadow-md);
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-3px); }

/* ==================== 在线客服 ==================== */
.float-service { position: fixed; bottom: 90px; right: 30px; z-index: 98; }
.service-toggle {
    width: 56px; height: 56px; border-radius: 50%; background: linear-gradient(135deg,var(--primary),var(--secondary));
    color: white; font-size: 26px; display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-md); transition: all var(--transition);
}
.service-toggle:hover { transform: scale(1.1); box-shadow: var(--shadow-lg); }

.service-panel {
    position: absolute; bottom: 66px; right: 0; width: 320px;
    background: white; border-radius: var(--radius-md); box-shadow: var(--shadow-lg);
    opacity: 0; visibility: hidden; transform: translateY(10px) scale(0.95);
    transition: all 0.25s ease; overflow: hidden;
}
.service-panel.open { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }

.service-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 20px; background: var(--primary); color: white;
    font-weight: 600; font-size: 15px;
}
.service-close {
    width: 28px; height: 28px; border-radius: 50%; background: rgba(255,255,255,0.2);
    color: white; font-size: 18px; display: flex; align-items: center; justify-content: center;
}
.service-close:hover { background: rgba(255,255,255,0.3); }
.service-body { padding: 20px; font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

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

.animate-on-scroll {
    opacity: 0; transform: translateY(30px); transition: all 0.6s cubic-bezier(0.4,0,0.2,1);
}
.animate-on-scroll.animated {
    opacity: 1; transform: translateY(0);
}