/* ================= 全局基础变量 ================= */
body {
    margin: 0; padding: 0; background: #FFFFFF; color: #0F172A;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    -webkit-font-smoothing: antialiased; line-height: 1.6;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
a { text-decoration: none; color: inherit; transition: all .3s ease; }
ul, li { list-style: none; }
img { max-width: 100%; height: auto; vertical-align: middle; }

.v2-wrap { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 10; }
.v2-btn {
    display: inline-flex; align-items: center; justify-content: center;
    height: 48px; padding: 0 28px; border-radius: 8px;
    font-size: 15px; font-weight: 600; cursor: pointer; border: none;
    transition: all .3s ease;
}
.v2-btn-primary { 
    background: linear-gradient(90deg, #1D4ED8, #3B82F6); 
    color: #fff !important; 
    box-shadow: 0 4px 15px rgba(37,99,235,.4); 
}
.v2-btn-primary:hover { 
    box-shadow: 0 6px 20px rgba(37,99,235,.6); 
    transform: translateY(-2px); 
    background: linear-gradient(90deg, #2563EB, #60A5FA);
}
.v2-btn-outline { background: #fff; border: 1px solid #E2E8F0; color: #334155 !important; }
.v2-btn-outline:hover { border-color: #2563EB; color: #2563EB !important; }

/* ================= 顶部导航 (全站统一白底，Logo 放大) ================= */
.site-header { background: #fff; position: relative; z-index: 999; }
.topbar { background: #F8FAFC; border-bottom: 1px solid #E2E8F0; font-size: 13px; color: #64748B; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; height: 38px; }
.topbar-right { display: flex; gap: 20px; align-items: center; }
.topbar-right a:hover { color: #2563EB; }

.mainnav { border-bottom: 1px solid #E2E8F0; background: #fff; }
.mainnav-inner { display: flex; justify-content: space-between; align-items: center; height: 88px; }
.nav-logo img { max-height: 70px; width: auto; max-width: 240px; object-fit: contain; }

.nav-links { display: flex; gap: 26px; }
.nav-links a { font-size: 16px; font-weight: 500; color: #334155; position: relative; padding: 34px 0; }
.nav-links a:hover { color: #2563EB; }
.nav-links a::after {
    content: ''; position: absolute; bottom: -1px; left: 0; width: 100%; height: 3px; border-radius: 3px 3px 0 0;
    background: #2563EB; transform: scaleX(0); transition: transform .3s; transform-origin: center;
}
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }

.nav-action { display: flex; align-items: center; gap: 20px; }
.nav-cart { display: flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 500; color: #334155; }
.cart-num { background: #2563EB; color: #fff; font-size: 12px; padding: 2px 6px; border-radius: 10px; line-height: 1; }
.nav-action .v2-btn-outline { height: 38px; padding: 0 20px; }

.mobile-toggle { display: none; cursor: pointer; width: 24px; height: 20px; position: relative; }
.mobile-toggle span { display: block; position: absolute; width: 100%; height: 2px; background: #0F172A; border-radius: 2px; transition: all .3s; }
.mobile-toggle span:nth-child(1) { top: 0; }
.mobile-toggle span:nth-child(2) { top: 9px; }
.mobile-toggle span:nth-child(3) { top: 18px; }

/* ================= 首屏 Hero ================= */
.hero-section {
    background: #0A1128; padding: 90px 0 110px; text-align: center; position: relative; overflow: hidden;
    color: #fff; 
}
.hero-bg-effects { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1; pointer-events: none; }
.glow-left { position: absolute; top: 20%; left: -10%; width: 600px; height: 600px; border-radius: 50%; background: radial-gradient(circle, rgba(37,99,235,0.4) 0%, transparent 60%); filter: blur(60px); }
.glow-right { position: absolute; top: 30%; right: -10%; width: 700px; height: 700px; border-radius: 50%; background: radial-gradient(circle, rgba(139,92,246,0.3) 0%, transparent 60%); filter: blur(60px); }
.tech-grid {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 40px 40px; mask-image: linear-gradient(180deg, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 90%); -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 90%);
}

.hero-content { z-index: 10; }
.hero-content h1 { font-size: 52px; font-weight: 800; color: #fff; letter-spacing: 0.02em; margin-bottom: 16px; text-shadow: 0 4px 20px rgba(0,0,0,0.5); }
.hero-content p { font-size: 18px; color: rgba(255,255,255,0.7); margin-bottom: 40px; }

.search-box { max-width: 760px; margin: 0 auto; position: relative; z-index: 10; }
.search-form { display: flex; background: rgba(255,255,255,0.08); backdrop-filter: blur(16px); padding: 8px; border-radius: 12px; border: 1px solid rgba(255,255,255,0.15); box-shadow: 0 10px 40px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.2); }
.search-input-wrapper { flex: 1; display: flex; align-items: center; padding-left: 16px; }
.search-input-wrapper input { width: 100%; border: none; outline: none; font-size: 16px; height: 48px; background: transparent; color: #fff; }
.search-input-wrapper input::placeholder { color: rgba(255,255,255,0.4); }

.search-tags { margin-top: 24px; display: flex; justify-content: center; gap: 24px; font-size: 14px; color: rgba(255,255,255,0.6); flex-wrap: wrap; }
.search-tags label { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.search-tags a { color: #60A5FA; font-weight: 500; }

.domext-wrapper { 
    display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 16px; 
    color: rgba(255,255,255,0.8); 
    font-size: 14px; 
}
.domext-wrapper label {
    display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
}

.quick-links { display: flex; justify-content: center; gap: 16px; margin-top: 48px; flex-wrap: wrap; position: relative; z-index: 10; }
.quick-links a { background: #fff; color: #0F172A; padding: 12px 28px; border-radius: 30px; font-size: 15px; font-weight: 600; box-shadow: 0 4px 15px rgba(0,0,0,0.1); }
.quick-links a:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(37,99,235,0.4); color: #2563EB; }

/* ================= 企业数字化服务 ================= */
.section { padding: 80px 0; }
.section-tech-bg { background: #F8FAFC; position: relative; overflow: hidden; }
.tech-lines-container { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 1; }
.section-header { text-align: center; margin-bottom: 48px; position: relative; z-index: 2; }
.section-header h2 { font-size: 32px; font-weight: 800; color: #0F172A; margin-bottom: 12px; }
.section-header p { font-size: 16px; color: #64748B; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; position: relative; z-index: 2; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; z-index: 2; }

.biz-card { padding: 36px 32px; border-radius: 20px; display: flex; flex-direction: column; gap: 24px; }
.glass-card {
    background: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(255,255,255,0.6));
    backdrop-filter: blur(24px); border: 1px solid rgba(255,255,255,1);
    box-shadow: 0 20px 40px -10px rgba(15,23,42,0.05), inset 0 2px 4px rgba(255,255,255,1), inset 0 -2px 10px rgba(37,99,235,0.05);
    transition: all .4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.biz-card:hover { transform: translateY(-8px); box-shadow: 0 30px 50px -10px rgba(37,99,235,0.15), inset 0 2px 4px rgba(255,255,255,1); border-color: rgba(37,99,235,0.3); }

.biz-icon { width: 60px; height: 60px; border-radius: 16px; background: #EFF6FF; display: flex; align-items: center; justify-content: center; box-shadow: 0 8px 16px rgba(37,99,235,0.15); }
.biz-icon span { display: block; width: 28px; height: 28px; background-color: #2563EB; mask-size: contain; mask-repeat: no-repeat; mask-position: center; -webkit-mask-size: contain; -webkit-mask-repeat: no-repeat; -webkit-mask-position: center; }
.icon-web { mask-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1 17.93c-3.95-.49-7-3.85-7-7.93 0-.62.08-1.21.21-1.79L9 15v1c0 1.1.9 2 2 2v1.93zm6.9-2.54c-.26-.81-1-1.39-1.9-1.39h-1v-3c0-.55-.45-1-1-1H8v-2h2c.55 0 1-.45 1-1V7h2c1.1 0 2-.9 2-2v-.41c2.93 1.19 5 4.06 5 7.41 0 2.08-.8 3.97-2.1 5.39z"/></svg>'); -webkit-mask-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1 17.93c-3.95-.49-7-3.85-7-7.93 0-.62.08-1.21.21-1.79L9 15v1c0 1.1.9 2 2 2v1.93zm6.9-2.54c-.26-.81-1-1.39-1.9-1.39h-1v-3c0-.55-.45-1-1-1H8v-2h2c.55 0 1-.45 1-1V7h2c1.1 0 2-.9 2-2v-.41c2.93 1.19 5 4.06 5 7.41 0 2.08-.8 3.97-2.1 5.39z"/></svg>'); }
.icon-app { mask-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M17 1H7c-1.1 0-2 .9-2 2v18c0 1.1.9 2 2 2h10c1.1 0 2-.9 2-2V3c0-1.1-.9-2-2-2zm0 18H7V5h10v14z"/></svg>'); -webkit-mask-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M17 1H7c-1.1 0-2 .9-2 2v18c0 1.1.9 2 2 2h10c1.1 0 2-.9 2-2V3c0-1.1-.9-2-2-2zm0 18H7V5h10v14z"/></svg>'); }
.icon-tm { mask-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-1-13h2v6h-2zm0 8h2v2h-2z"/></svg>'); -webkit-mask-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-1-13h2v6h-2zm0 8h2v2h-2z"/></svg>'); }

.biz-content h3 { font-size: 20px; font-weight: 700; color: #0F172A; margin-bottom: 8px; }
.biz-content p { font-size: 14px; color: #64748B; line-height: 1.7; margin-bottom: 16px; }
.biz-content span { color: #2563EB; font-size: 14px; font-weight: 600; }

/* ================= 云基础服务组阵 ================= */
.section-light { background: #fff; }
.prod-card { background: #fff; border: 1px solid #E2E8F0; border-radius: 16px; padding: 30px 24px; transition: all .3s; position: relative; overflow: hidden; }
.prod-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: linear-gradient(90deg, #2563EB, #06B6D4); opacity: 0; transition: opacity .3s; }
.prod-card:hover { transform: translateY(-6px); box-shadow: 0 20px 40px -10px rgba(15,23,42,0.1); border-color: #BFDBFE; }
.prod-card:hover::before { opacity: 1; }

.prod-title { font-size: 20px; font-weight: 700; color: #0F172A; margin-bottom: 8px; }
.prod-desc { font-size: 14px; color: #64748B; margin-bottom: 24px; line-height: 1.6; }
.prod-bottom { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 20px; }
.prod-price { font-size: 14px; color: #64748B; }
.prod-price strong { font-size: 36px; font-weight: 800; color: #2563EB; letter-spacing: -0.02em; }
.prod-link { font-size: 14px; font-weight: 600; color: #2563EB; }

.css-3d-icon { width: 56px; height: 56px; position: relative; }
.cylinder { background: linear-gradient(90deg, #3B82F6, #2563EB, #1D4ED8); border-radius: 50% / 20%; box-shadow: inset 0 -10px 15px rgba(0,0,0,0.2), 0 10px 20px rgba(37,99,235,0.3); }
.cylinder-blue { background: linear-gradient(90deg, #06B6D4, #0891B2, #0E7490); border-radius: 50% / 20%; box-shadow: inset 0 -10px 15px rgba(0,0,0,0.2), 0 10px 20px rgba(6,182,212,0.3); }
.cylinder-dark { background: linear-gradient(90deg, #1E293B, #0F172A); border-radius: 50% / 20%; box-shadow: inset 0 -10px 15px rgba(0,0,0,0.5), 0 10px 20px rgba(15,23,42,0.3); }
.chart-icon { background: linear-gradient(135deg, #EFF6FF, #DBEAFE); border-radius: 12px; box-shadow: inset 0 0 10px #fff, 0 10px 20px rgba(37,99,235,0.2); }
.chart-icon::after { content: ''; position: absolute; bottom: 12px; left: 12px; width: 8px; height: 16px; background: #3B82F6; border-radius: 2px 2px 0 0; box-shadow: 12px 8px 0 #2563EB, 24px -4px 0 #1D4ED8; }

/* ================= 热门套餐 ================= */
.plan-card { background: #fff; border: 1px solid #E2E8F0; border-radius: 16px; padding: 32px; display: flex; flex-direction: column; position: relative; transition: all .3s; }
.plan-card:hover { transform: translateY(-5px); box-shadow: 0 20px 40px -10px rgba(15,23,42,0.1); }
.plan-title { font-size: 22px; font-weight: 700; color: #0F172A; margin-bottom: 8px; }
.plan-price { font-size: 44px; font-weight: 800; color: #0F172A; margin-bottom: 24px; letter-spacing: -0.03em; line-height: 1; }
.plan-price span { font-size: 15px; color: #64748B; font-weight: 400; margin-left: 4px; }
.plan-specs { border-top: 1px solid #F1F5F9; padding-top: 24px; margin-bottom: 32px; flex: 1; display: grid; gap: 12px; font-size: 15px; color: #64748B; }
.plan-actions { display: flex; gap: 12px; }
.plan-actions .v2-btn { flex: 1; height: 44px; font-size: 14px; }

.plan-card.is-hot { border: 2px solid #3B82F6; box-shadow: 0 0 30px rgba(59,130,246,0.15); }
.badge { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: linear-gradient(90deg, #2563EB, #3B82F6); color: #fff; font-size: 12px; font-weight: 700; padding: 4px 16px; border-radius: 20px; box-shadow: 0 4px 10px rgba(37,99,235,0.3); }

/* ================= 页脚 ================= */
/* 补充 footer-top 的样式，解决之前裸奔问题 */
.footer-top { background: #F8FAFC; border-top: 1px solid #E2E8F0; padding: 40px 0; }
.footer-top-list { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.footer-top-list li { flex: 1; text-align: center; position: relative; }
.footer-top-list li:not(:last-child)::after {
    content: ''; position: absolute; right: 0; top: 50%; transform: translateY(-50%);
    width: 1px; height: 24px; background: #CBD5E1; /* 分割线 */
}
.footer-top-list .section-title { font-size: 18px; font-weight: 700; color: #334155; }

.site-footer { background: #0A1128; color: #94A3B8; padding: 60px 0 30px; font-size: 14px; }
.footer-links { display: flex; justify-content: center; gap: 40px; margin-bottom: 24px; flex-wrap: wrap; }
.footer-links a { color: #CBD5E1; }
.footer-links a:hover { color: #fff; }
.footer-copyright { text-align: center; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; font-size: 13px; }
.footer-copyright a { color: #94A3B8; }
.footer-copyright a:hover { color: #fff; }

/* ================= 移动端自适应 ================= */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .nav-links { gap: 16px; }
    .nav-links a { font-size: 14px; }
    .nav-logo img { max-height: 40px; }
    .hero-content h1 { font-size: 40px; }
    .footer-top-list li { flex: none; width: 45%; margin-bottom: 20px; }
    .footer-top-list li:not(:last-child)::after { display: none; }
}
@media (max-width: 768px) {
    .topbar { display: none; }
    .mainnav-inner { height: 64px; }
    .nav-logo img { max-height: 32px; }
    .mobile-toggle { display: block; }
    .nav-links { display: none; position: absolute; top: 64px; left: 0; width: 100%; background: #fff; flex-direction: column; gap: 0; box-shadow: 0 10px 20px rgba(0,0,0,.1); z-index: 999; }
    .nav-links a { padding: 16px 24px; border-bottom: 1px solid #F1F5F9; font-size: 16px; }
    .nav-links a::after { display: none; }
    .nav-action { display: none; }
    
    .hero-section { padding: 60px 0 80px; }
    .hero-content h1 { font-size: 32px; }
    .search-form { flex-direction: column; padding: 12px; gap: 12px; }
    .search-form .v2-btn { width: 100%; }
    
    .section { padding: 50px 0; }
    .grid-4, .grid-3 { grid-template-columns: 1fr; }
    .section-header h2 { font-size: 26px; }
    
    .footer-top-list li { flex: none; width: 100%; }
}