/* ===================================
   车舆情 - 汽车行业AI舆情监测平台
   CHEYUQING - Auto Industry Intelligence
   =================================== */

:root {
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --accent-cyan: #06b6d4;
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-orange: #f97316;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    
    --dark-bg: #0b0f19;
    --dark-card: #111827;
    --dark-elevated: #1f2937;
    --dark-border: rgba(255, 255, 255, 0.08);
    
    --text-white: #ffffff;
    --text-light: #e2e8f0;
    --text-muted: #94a3b8;
    --text-dark: #0f172a;
    
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
    --gradient-dark: linear-gradient(180deg, #0b0f19 0%, #111827 100%);
    --gradient-hero: radial-gradient(ellipse at 50% 0%, rgba(37, 99, 235, 0.15) 0%, transparent 60%);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 60px rgba(37, 99, 235, 0.25);
    
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    --transition: 0.3s ease;
    --container-max: 1320px;
    --section-padding: 6rem;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--text-white);
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: all var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }

.container { max-width: var(--container-max); margin: 0 auto; padding: 0 1.5rem; }

/* 预加载 */
.preloader {
    position: fixed;
    inset: 0;
    background: var(--dark-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}
.preloader.hidden { opacity: 0; visibility: hidden; }
.preloader-content { text-align: center; }
.loader-ring {
    width: 60px;
    height: 60px;
    border: 3px solid rgba(255,255,255,0.1);
    border-top-color: var(--primary-light);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}
.loader-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-white);
    letter-spacing: 0.2em;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius);
    transition: all var(--transition);
}
.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-white);
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.5);
}
.btn-outline {
    background: transparent;
    color: var(--text-white);
    border: 1px solid rgba(255, 255, 255, 0.25);
}
.btn-outline:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.4);
}
.btn-lg { padding: 1rem 2rem; font-size: 1rem; }
.btn-block { width: 100%; }

/* 导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--dark-border);
    transition: all var(--transition);
}
.header.scrolled { padding: 0.75rem 0; background: rgba(11, 15, 25, 0.95); }
.header .container { display: flex; align-items: center; justify-content: space-between; }

.logo { display: flex; align-items: center; gap: 0.75rem; }
.logo-mark {
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--text-white);
    position: relative;
}
.logo-pulse {
    position: absolute;
    inset: -4px;
    border: 2px solid var(--primary-light);
    border-radius: var(--radius);
    opacity: 0;
    animation: pulse-ring 2s ease-out infinite;
}
@keyframes pulse-ring {
    0% { transform: scale(1); opacity: 0.6; }
    100% { transform: scale(1.2); opacity: 0; }
}
.logo-name { font-size: 1.25rem; font-weight: 700; color: var(--text-white); display: block; line-height: 1.2; }
.logo-slogan { font-size: 0.625rem; color: var(--text-muted); letter-spacing: 0.1em; display: block; }

.nav-list { display: flex; gap: 0.25rem; }
.nav-link {
    display: block;
    padding: 0.625rem 1rem;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-light);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--text-white); background: rgba(255,255,255,0.06); }

.header-actions { display: flex; align-items: center; gap: 1rem; }
.header-phone {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    color: var(--primary-light);
    font-weight: 600;
    font-size: 0.9375rem;
}
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
}
.menu-toggle span { width: 24px; height: 2px; background: var(--text-white); transition: all var(--transition); }

/* Hero */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--dark-bg);
    overflow: hidden;
    padding-top: 5rem;
}
.hero-canvas { position: absolute; inset: 0; pointer-events: none; z-index: 1; }
.hero-overlay {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
    z-index: 2;
}
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 80px 80px;
    z-index: 2;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}
.hero .container {
    position: relative;
    z-index: 3;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(37, 99, 235, 0.15);
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    color: var(--accent-cyan);
    margin-bottom: 1.5rem;
}
.hero-badge i { color: var(--accent-cyan); }
.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-white);
    line-height: 1.15;
    margin-bottom: 1.5rem;
}
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 1.125rem;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 2rem;
}
.hero-stats {
    display: flex;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}
.hstat-num { font-size: 1.5rem; font-weight: 700; color: var(--text-white); }
.hstat-label { font-size: 0.8125rem; color: var(--text-muted); }
.hero-btns { display: flex; gap: 1rem; }

/* 地球视觉 */
.hero-visual { position: relative; display: flex; justify-content: center; align-items: center; }
.data-globe {
    position: relative;
    width: 400px;
    height: 400px;
}
.globe-core {
    position: absolute;
    inset: 15%;
    background: radial-gradient(circle at 30% 30%, rgba(37, 99, 235, 0.4), rgba(6, 182, 212, 0.2));
    border-radius: 50%;
    box-shadow: 0 0 80px rgba(37, 99, 235, 0.3), inset 0 0 60px rgba(6, 182, 212, 0.2);
}
.globe-ring {
    position: absolute;
    border: 1px solid rgba(37, 99, 235, 0.3);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.globe-ring.ring-1 { width: 70%; height: 70%; animation: rotate1 10s linear infinite; }
.globe-ring.ring-2 { width: 85%; height: 85%; border-color: rgba(6, 182, 212, 0.2); animation: rotate2 15s linear infinite; }
.globe-ring.ring-3 { width: 100%; height: 100%; border-color: rgba(139, 92, 246, 0.15); animation: rotate3 20s linear infinite; }
@keyframes rotate1 { from { transform: translate(-50%, -50%) rotate(0deg); } to { transform: translate(-50%, -50%) rotate(360deg); } }
@keyframes rotate2 { from { transform: translate(-50%, -50%) rotate(360deg); } to { transform: translate(-50%, -50%) rotate(0deg); } }
@keyframes rotate3 { from { transform: translate(-50%, -50%) rotate(0deg); } to { transform: translate(-50%, -50%) rotate(-360deg); } }

.globe-dot {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-cyan);
}
.globe-dot.dot-1 { top: 20%; left: 30%; animation: float-dot 3s ease-in-out infinite; }
.globe-dot.dot-2 { top: 60%; right: 20%; animation: float-dot 3s ease-in-out infinite 0.5s; }
.globe-dot.dot-3 { bottom: 25%; left: 25%; animation: float-dot 3s ease-in-out infinite 1s; }
.globe-dot.dot-4 { top: 40%; right: 35%; animation: float-dot 3s ease-in-out infinite 1.5s; }
@keyframes float-dot { 0%, 100% { opacity: 0.4; transform: scale(0.8); } 50% { opacity: 1; transform: scale(1.2); } }

.float-cards { position: absolute; inset: 0; }
.fcard {
    position: absolute;
    padding: 0.875rem 1rem;
    background: rgba(17, 24, 39, 0.9);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    animation: float-card 4s ease-in-out infinite;
}
.fcard i { font-size: 1.25rem; color: var(--accent-cyan); }
.fcard-title { color: var(--text-muted); font-size: 0.75rem; }
.fcard-val { color: var(--text-white); font-weight: 600; }
.fcard-1 { top: 15%; right: 0; }
.fcard-2 { bottom: 20%; left: -10%; animation-delay: 1s; }
@keyframes float-card { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

.hero-scroll { position: absolute; bottom: 2.5rem; left: 50%; transform: translateX(-50%); z-index: 3; }
.scroll-down {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}
.scroll-down i { animation: bounce 2s infinite; }
@keyframes bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(8px); } }

/* 区块头部 */
.section-header { margin-bottom: 3.5rem; }
.section-header.center { text-align: center; }
.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}
.section-tag-light {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-cyan);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}
.section-title { font-size: 2.5rem; font-weight: 700; color: var(--text-dark); line-height: 1.2; margin-bottom: 0.75rem; }
.section-title-light { font-size: 2.5rem; font-weight: 700; color: var(--text-white); line-height: 1.2; margin-bottom: 0.75rem; }
.section-desc { font-size: 1.0625rem; color: var(--text-muted); max-width: 600px; }
.section-desc-light { font-size: 1.0625rem; color: rgba(255,255,255,0.6); max-width: 600px; }
.section-header.center .section-desc, .section-header.center .section-desc-light { margin: 0 auto; }

/* 产品 */
.products { padding: var(--section-padding) 0; background: #f8fafc; }
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.product-card {
    background: var(--text-white);
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition);
}
.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.product-card.featured {
    grid-column: span 2;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    border-color: rgba(255,255,255,0.05);
}
.product-card.featured h3 { color: var(--text-white); }
.product-card.featured p { color: var(--text-muted); }
.product-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-white);
    margin-bottom: 1.25rem;
}
.product-icon.blue { background: linear-gradient(135deg, #3b82f6, #2563eb); }
.product-icon.purple { background: linear-gradient(135deg, #a78bfa, #8b5cf6); }
.product-icon.cyan { background: linear-gradient(135deg, #22d3ee, #06b6d4); }
.product-icon.orange { background: linear-gradient(135deg, #fb923c, #f97316); }
.product-icon.green { background: linear-gradient(135deg, #34d399, #10b981); }

.product-card h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 0.75rem; }
.product-card p { font-size: 0.9375rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 1.25rem; }
.product-features { margin-bottom: 1.25rem; }
.product-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    padding: 0.375rem 0;
}
.product-features li i { color: var(--accent-green); font-size: 0.75rem; }
.product-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary);
}
.product-btn:hover { color: var(--primary-dark); gap: 0.75rem; }

/* 解决方案 */
.solutions { padding: var(--section-padding) 0; background: var(--dark-bg); }
.solutions-slider { position: relative; min-height: 420px; }
.solution-slide {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    animation: fadeSlide 0.5s ease;
}
.solution-slide.active { display: grid; }
@keyframes fadeSlide { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }

.slide-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--text-white);
    margin-bottom: 1.5rem;
}
.slide-content h3 { font-size: 2rem; font-weight: 700; color: var(--text-white); margin-bottom: 1rem; }
.slide-content p { font-size: 1rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 1.5rem; }
.slide-features { margin-bottom: 2rem; }
.slide-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.625rem 0;
    font-size: 0.9375rem;
    color: var(--text-light);
    border-bottom: 1px solid var(--dark-border);
}
.slide-features li i { color: var(--accent-cyan); margin-top: 3px; }

.slide-visual { display: flex; justify-content: center; }
.viz-card {
    width: 100%;
    max-width: 400px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    backdrop-filter: blur(10px);
}
.viz-card.alert { border-color: rgba(239, 68, 68, 0.3); }
.viz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    font-size: 0.9375rem;
    color: var(--text-white);
    font-weight: 500;
}
.viz-status { padding: 0.25rem 0.75rem; border-radius: var(--radius-full); font-size: 0.75rem; font-weight: 600; }
.viz-status.success { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); }
.viz-status.danger { background: rgba(239, 68, 68, 0.15); color: var(--accent-red); }

.viz-chart {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 0.75rem;
    height: 140px;
    margin-bottom: 1.5rem;
}
.chart-bar {
    flex: 1;
    background: rgba(255,255,255,0.1);
    border-radius: 4px 4px 0 0;
    transition: all var(--transition);
}
.chart-bar.active { background: var(--gradient-primary); }
.viz-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}
.viz-footer strong { color: var(--text-white); font-size: 1.25rem; }
.trend-up { color: var(--accent-green); font-weight: 600; }

.viz-bars { display: flex; flex-direction: column; gap: 1rem; }
.vbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.875rem;
}
.vbar span { width: 60px; color: var(--text-muted); }
.vbar-fill {
    height: 8px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width 1s ease;
}

.viz-tags { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.viz-tags span { padding: 0.5rem 1rem; border-radius: var(--radius-full); font-size: 0.875rem; }
.tag-lg { font-size: 1.125rem !important; font-weight: 600; }
.tag-md { font-size: 1rem !important; }
.tag-sm { font-size: 0.75rem !important; }
.tag-lg.pos { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); }
.tag-md.pos { background: rgba(16, 185, 129, 0.1); color: var(--accent-green); }
.tag-sm.pos { background: rgba(16, 185, 129, 0.08); color: var(--accent-green); }
.tag-lg.neg { background: rgba(239, 68, 68, 0.15); color: var(--accent-red); }
.tag-md.neg { background: rgba(239, 68, 68, 0.1); color: var(--accent-red); }
.tag-sm.neg { background: rgba(239, 68, 68, 0.08); color: var(--accent-red); }

.viz-alert {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: rgba(239, 68, 68, 0.08);
    border-radius: var(--radius);
}
.viz-alert i { font-size: 1.5rem; color: var(--accent-red); }
.viz-alert strong { color: var(--text-white); font-size: 1rem; display: block; margin-bottom: 0.25rem; }
.viz-alert p { color: var(--text-muted); font-size: 0.875rem; margin: 0; }

.solutions-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 3rem;
}
.sol-nav-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: transparent;
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    color: var(--text-muted);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all var(--transition);
}
.sol-nav-btn:hover { border-color: rgba(255,255,255,0.2); color: var(--text-light); }
.sol-nav-btn.active {
    background: rgba(37, 99, 235, 0.15);
    border-color: rgba(37, 99, 235, 0.4);
    color: var(--text-white);
}
.sol-nav-btn i { font-size: 1.125rem; }

/* 数据能力 */
.data-capability { padding: var(--section-padding) 0; background: #f8fafc; }
.data-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}
.data-card {
    background: var(--text-white);
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    text-align: center;
    transition: all var(--transition);
}
.data-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.data-card.large { grid-column: span 2; text-align: left; }
.data-card.wide { grid-column: span 2; text-align: left; }
.data-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-white);
    margin: 0 auto 1rem;
}
.data-card.large .data-icon, .data-card.wide .data-icon { margin: 0 0 1rem; }
.data-card h3 { font-size: 1rem; font-weight: 600; color: var(--text-dark); margin-bottom: 0.75rem; }
.data-metric { margin-bottom: 0.5rem; }
.metric-num { font-size: 2.5rem; font-weight: 700; color: var(--primary); line-height: 1; }
.metric-unit { font-size: 1.25rem; font-weight: 600; color: var(--primary); }
.data-card p { font-size: 0.875rem; color: var(--text-muted); }

.data-sources h4 { font-size: 1rem; font-weight: 600; color: var(--text-dark); margin-bottom: 1rem; }
.source-tags { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.source-tags span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: #f1f5f9;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-dark);
}
.source-tags span i { color: var(--primary); }

/* 客户案例 */
.cases { padding: var(--section-padding) 0; background: var(--dark-bg); }
.clients-marquee {
    margin-bottom: 4rem;
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}
.clients-track {
    display: flex;
    gap: 2rem;
    animation: marquee 25s linear infinite;
}
@keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
.client-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
    white-space: nowrap;
}
.client-logo i { font-size: 1.25rem; }

.cases-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.case-card {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition);
}
.case-card:hover {
    background: rgba(255,255,255,0.04);
    transform: translateY(-5px);
}
.case-quote { font-size: 1.5rem; color: var(--primary-light); margin-bottom: 1rem; opacity: 0.5; }
.case-text { font-size: 1rem; color: var(--text-light); line-height: 1.7; margin-bottom: 1.5rem; }
.case-author { display: flex; align-items: center; gap: 1rem; }
.author-avatar {
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: 1.125rem;
}
.author-info strong { display: block; color: var(--text-white); font-size: 0.9375rem; }
.author-info span { font-size: 0.8125rem; color: var(--text-muted); }

/* 洞察报告 */
.news { padding: var(--section-padding) 0; background: var(--text-white); }
.news-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 2rem; }
.news-card-large {
    background: var(--text-white);
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
}
.news-card-large:hover { box-shadow: var(--shadow-lg); }
.news-image { position: relative; height: 280px; }
.img-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--primary-light);
}
.news-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.375rem 0.875rem;
    background: var(--accent-orange);
    color: var(--text-white);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}
.news-content { padding: 1.5rem; }
.news-meta { display: flex; gap: 1rem; margin-bottom: 0.75rem; }
.news-date, .news-cat { font-size: 0.8125rem; color: var(--text-muted); }
.news-content h3 { font-size: 1.25rem; font-weight: 600; color: var(--text-dark); line-height: 1.4; margin-bottom: 0.75rem; }
.news-content p { font-size: 0.9375rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 1rem; }
.news-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary);
}
.news-more:hover { gap: 0.75rem; }

.news-list { display: flex; flex-direction: column; gap: 1rem; }
.news-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: #f8fafc;
    border-radius: var(--radius);
    transition: all var(--transition);
}
.news-item:hover { background: #f1f5f9; }
.news-thumb { width: 100px; height: 80px; border-radius: var(--radius-sm); overflow: hidden; flex-shrink: 0; }
.news-thumb .img-placeholder { font-size: 1.5rem; }
.news-body { display: flex; flex-direction: column; justify-content: center; }
.news-body h4 { font-size: 1rem; font-weight: 600; color: var(--text-dark); line-height: 1.4; }

/* 联系我们 */
.contact { padding: var(--section-padding) 0; background: #f8fafc; }
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    background: var(--text-white);
    border-radius: var(--radius-xl);
    padding: 3rem;
    box-shadow: var(--shadow-lg);
}
.contact-desc { font-size: 1rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 2rem; }
.contact-items { display: flex; flex-direction: column; gap: 1.5rem; }
.citem { display: flex; gap: 1rem; }
.citem i {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    color: var(--text-white);
    flex-shrink: 0;
}
.citem strong { display: block; font-size: 0.875rem; color: var(--text-muted); margin-bottom: 0.25rem; }
.citem span { font-size: 1rem; font-weight: 500; color: var(--text-dark); }

.contact-form-box { background: #f8fafc; border-radius: var(--radius-lg); padding: 2rem; }
.contact-form .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { margin-bottom: 1rem; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--text-white);
    border: 1px solid #e2e8f0;
    border-radius: var(--radius);
    font-size: 0.9375rem;
    color: var(--text-dark);
    transition: all var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: #94a3b8; }
.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
}

/* 页脚 */
.footer { background: #05070a; padding: 4rem 0 0; }
.footer-main { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
.footer-brand p { font-size: 0.9375rem; color: var(--text-muted); line-height: 1.7; margin: 1rem 0 1.5rem; }
.footer-social { display: flex; gap: 0.75rem; }
.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all var(--transition);
}
.footer-social a:hover { background: var(--primary); border-color: var(--primary); color: var(--text-white); }

.footer-links h4 { font-size: 1rem; font-weight: 600; color: var(--text-white); margin-bottom: 1.25rem; }
.footer-links li { margin-bottom: 0.75rem; }
.footer-links a { font-size: 0.9375rem; color: var(--text-muted); }
.footer-links a:hover { color: var(--text-white); }

.footer-qr h4 { font-size: 1rem; font-weight: 600; color: var(--text-white); margin-bottom: 1rem; }
.qr-box {
    width: 110px;
    height: 110px;
    background: var(--text-white);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    color: var(--dark-bg);
    margin-bottom: 0.75rem;
}
.footer-qr p { font-size: 0.8125rem; color: var(--text-muted); }

.footer-bottom {
    border-top: 1px solid var(--dark-border);
    padding: 1.5rem 0;
    text-align: center;
}
.footer-bottom p { font-size: 0.875rem; color: var(--text-muted); }
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--text-white); }

/* 悬浮工具 */
.float-bar {
    position: fixed;
    right: 20px;
    bottom: 100px;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 999;
}
.float-item {
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition);
}
.float-item:hover { transform: scale(1.1); box-shadow: var(--shadow-xl); }
.float-item.back-to-top {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    opacity: 0;
    visibility: hidden;
}
.float-item.back-to-top.visible { opacity: 1; visibility: visible; }

/* 响应式 */
@media (max-width: 1200px) {
    .hero .container { grid-template-columns: 1fr; text-align: center; }
    .hero-visual { display: none; }
    .hero-btns, .hero-stats { justify-content: center; }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .product-card.featured { grid-column: span 2; }
    .solution-slide { grid-template-columns: 1fr; }
    .slide-visual { order: -1; }
    .data-grid { grid-template-columns: repeat(2, 1fr); }
    .data-card.large, .data-card.wide { grid-column: span 2; }
    .news-grid { grid-template-columns: 1fr; }
    .cases-cards { grid-template-columns: repeat(2, 1fr); }
    .contact-wrapper { grid-template-columns: 1fr; }
    .footer-main { grid-template-columns: repeat(3, 1fr); }
    .footer-brand { grid-column: span 3; }
}

@media (max-width: 768px) {
    :root { --section-padding: 4rem; }
    .nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--dark-bg);
        padding: 5rem 1.5rem 1.5rem;
        transform: translateX(100%);
        transition: transform var(--transition);
    }
    .nav.active { transform: translateX(0); }
    .nav-list { flex-direction: column; gap: 0.5rem; }
    .nav-link { font-size: 1.125rem; padding: 1rem; }
    .menu-toggle { display: flex; z-index: 1001; }
    .header-phone span { display: none; }
    .hero-title { font-size: 2.25rem; }
    .products-grid, .data-grid, .cases-cards { grid-template-columns: 1fr; }
    .product-card.featured, .data-card.large, .data-card.wide { grid-column: span 1; }
    .solutions-nav { flex-wrap: wrap; }
    .sol-nav-btn { padding: 0.75rem 1rem; font-size: 0.8125rem; }
    .sol-nav-btn span { display: none; }
    .cases-cards { grid-template-columns: 1fr; }
    .footer-main { grid-template-columns: 1fr; text-align: center; }
    .footer-brand { grid-column: span 1; }
    .footer-social { justify-content: center; }
    .qr-box { margin: 0 auto 0.75rem; }
    .contact-form .form-row { grid-template-columns: 1fr; }
}