/* ===== 悦脑网站 共享样式 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #e0e6ed; line-height: 1.7; background: #0a0e1a;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* ===== Header ===== */
.header-top {
  background: rgba(10,14,26,0.9); backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(16,188,247,0.15);
}
.header-top-inner {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.5rem 1.5rem; max-width: 1200px; margin: 0 auto;
}
.logo { display: flex; align-items: center; gap: 0.5rem; }
.logo img { height: 36px; width: auto; filter: brightness(1.8); }
.header-phone { text-align: right; }
.header-phone .label { font-size: 0.75rem; color: #8899aa; }
.header-phone .num { font-size: 1.1rem; font-weight: 700; color: #10BCF7; }

/* ===== Nav ===== */
.nav {
  background: rgba(10,14,26,0.95); backdrop-filter: blur(10px);
  position: sticky; top: 0; z-index: 100;
  border-bottom: 1px solid rgba(16,188,247,0.1);
}
.nav-inner { max-width: 1200px; margin: 0 auto; display: flex; gap: 2rem; padding: 0 1.5rem; }
.nav-inner a {
  color: #8899aa; padding: 0.9rem 0; font-size: 0.95rem;
  border-bottom: 3px solid transparent; transition: all 0.2s;
}
.nav-inner a:hover, .nav-inner a.active { color: #10BCF7; border-bottom-color: #10BCF7; }

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, #050811 0%, #0a1628 40%, #0d2840 100%);
  color: #fff; padding: 6rem 1.5rem 5rem; text-align: center;
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -30%; right: -10%;
  width: 50%; height: 150%;
  background: radial-gradient(circle, rgba(16,188,247,0.12) 0%, transparent 60%);
  pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; bottom: -20%; left: -10%;
  width: 40%; height: 100%;
  background: radial-gradient(circle, rgba(0,200,255,0.08) 0%, transparent 60%);
  pointer-events: none;
}
.hero h1 {
  font-size: 3rem; font-weight: 700; margin-bottom: 1rem;
  position: relative; z-index: 1;
  background: linear-gradient(90deg, #fff 0%, #10BCF7 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p { font-size: 1.2rem; color: #8899aa; max-width: 560px; margin: 0 auto 2.5rem; position: relative; z-index: 1; }
.hero .subtitle { font-size: 1.3rem; color: #8899aa; margin-bottom: 0.5rem; }
.hero .desc { font-size: 1rem; color: #667788; max-width: 500px; }
.hero-btns { display: flex; gap: 1rem; justify-content: center; position: relative; z-index: 1; flex-wrap: wrap; }

/* ===== Page Hero ===== */
.page-hero {
  background: linear-gradient(135deg, #050811 0%, #0a1628 50%, #0d2840 100%);
  color: #fff; padding: 3.5rem 1.5rem 3rem; text-align: center; position: relative; overflow: hidden;
}
.page-hero::before {
  content: ''; position: absolute; top: -40%; right: -10%;
  width: 50%; height: 150%;
  background: radial-gradient(circle, rgba(16,188,247,0.1) 0%, transparent 60%);
  pointer-events: none;
}
.page-hero h1 { font-size: 2.2rem; font-weight: 700; position: relative; z-index: 1; }
.page-hero p { opacity: 0.6; font-size: 1rem; position: relative; z-index: 1; }

/* ===== Buttons ===== */
.btn {
  display: inline-block; padding: 0.9rem 2.4rem;
  border-radius: 8px; font-weight: 600; font-size: 1rem;
  transition: all 0.25s; cursor: pointer; border: none;
}
.btn-primary {
  background: linear-gradient(135deg, #10BCF7, #0a8ec2);
  color: #fff; box-shadow: 0 4px 20px rgba(16,188,247,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(16,188,247,0.5); }
.btn-outline { background: transparent; color: #10BCF7; border: 2px solid rgba(16,188,247,0.4); }
.btn-outline:hover { background: rgba(16,188,247,0.08); border-color: #10BCF7; }

/* ===== Section Base ===== */
.section { padding: 4.5rem 1.5rem; }
.section-title { font-size: 1.8rem; font-weight: 700; color: #fff; text-align: center; margin-bottom: 0.5rem; }
.section-subtitle { text-align: center; color: #8899aa; font-size: 1rem; max-width: 600px; margin: 0 auto 2.5rem; }

/* ===== Cards ===== */
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem; max-width: 1100px; margin: 0 auto;
}
.card {
  background: linear-gradient(135deg, rgba(16,188,247,0.04), rgba(10,37,64,0.2));
  border: 1px solid rgba(16,188,247,0.1);
  border-radius: 14px; padding: 2rem; transition: all 0.3s;
}
.card:hover { border-color: rgba(16,188,247,0.3); transform: translateY(-3px); }
.card .num {
  font-size: 2.5rem; font-weight: 700;
  background: linear-gradient(135deg, #10BCF7, #0a8ec2);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}
.card h4 { font-size: 1.15rem; color: #fff; margin-bottom: 0.6rem; }
.card p { color: #8899aa; font-size: 0.92rem; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, #050811 0%, #0a1628 50%, #0d2840 100%);
  color: #fff; text-align: center; padding: 5rem 1.5rem; position: relative; overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; top: -30%; left: 50%; transform: translateX(-50%);
  width: 60%; height: 150%;
  background: radial-gradient(circle, rgba(16,188,247,0.1) 0%, transparent 60%);
  pointer-events: none;
}
.cta-section h2 { font-size: 1.8rem; margin-bottom: 1.5rem; position: relative; z-index: 1; }

.contact-form {
  max-width: 500px; margin: 2.5rem auto 0;
  background: rgba(16,188,247,0.05); border-radius: 14px;
  padding: 1.8rem; border: 1px solid rgba(16,188,247,0.15); position: relative; z-index: 1;
}
.contact-form-row { display: flex; gap: 0.8rem; margin-bottom: 0.8rem; flex-wrap: wrap; }
.contact-form input, .contact-form textarea {
  flex: 1; min-width: 140px; padding: 0.8rem 1rem;
  border-radius: 8px; border: 1px solid rgba(16,188,247,0.2);
  background: rgba(10,14,26,0.6); color: #fff; font-size: 0.9rem;
}
.contact-form input::placeholder, .contact-form textarea::placeholder { color: #556677; }
.contact-form textarea { width: 100%; min-height: 80px; resize: vertical; }
.contact-form .btn-submit {
  width: 100%; padding: 0.9rem; background: linear-gradient(135deg, #10BCF7, #0a8ec2);
  color: #fff; border: none; border-radius: 8px;
  font-weight: 600; cursor: pointer; font-size: 1rem; transition: all 0.25s;
}
.contact-form .btn-submit:hover { box-shadow: 0 4px 20px rgba(16,188,247,0.4); transform: translateY(-1px); }
.contact-form .hint { text-align: center; color: #556677; font-size: 0.8rem; margin-top: 0.8rem; }

/* ===== Footer ===== */
.footer {
  background: #050811; color: #556677; padding: 3rem 1.5rem 2rem; font-size: 0.9rem;
  border-top: 1px solid rgba(16,188,247,0.08);
}
.footer-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; }
.footer-brand img { height: 34px; width: auto; margin-bottom: 0.8rem; filter: brightness(1.8); }
.footer-brand p { color: #445566; margin-bottom: 0.4rem; }
.footer h4 { color: #8899aa; font-size: 1rem; margin-bottom: 1rem; }
.footer a { color: #445566; display: block; margin-bottom: 0.4rem; transition: color 0.2s; }
.footer a:hover { color: #10BCF7; }
.footer-bottom {
  max-width: 1200px; margin: 2rem auto 0; padding-top: 1.5rem;
  border-top: 1px solid rgba(16,188,247,0.08);
  text-align: center; color: #334455; font-size: 0.85rem;
}

/* ===== Intro Section (什么是悦脑) ===== */
.intro-section { background: linear-gradient(180deg, #0d111c 0%, #0a0e1a 100%); text-align: center; }
.intro-lead {
  font-size: 1.15rem; color: #aabbcc; max-width: 640px;
  margin: 0 auto 2rem; line-height: 1.9;
}
.intro-lead strong { color: #10BCF7; }
.intro-features {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1.2rem; max-width: 1200px; margin: 0 auto;
}
.intro-feature {
  background: linear-gradient(135deg, rgba(16,188,247,0.05), rgba(10,37,64,0.2));
  border: 1px solid rgba(16,188,247,0.1);
  border-radius: 14px; padding: 1.8rem; text-align: left;
  transition: all 0.3s;
}
.intro-feature:hover { border-color: rgba(16,188,247,0.3); transform: translateY(-3px); }
.intro-feature .icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, rgba(16,188,247,0.15), rgba(16,188,247,0.05));
  color: #10BCF7; display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; margin-bottom: 1rem;
}
.intro-feature h4 { color: #fff; font-size: 1.05rem; margin-bottom: 0.5rem; }
.intro-feature p { color: #8899aa; font-size: 0.9rem; }
.intro-conclusion {
  margin-top: 2.5rem; font-size: 1.1rem; color: #ccddee;
}
.intro-conclusion strong { color: #10BCF7; }

/* ===== Quote / Statement Block ===== */
.statement-block {
  padding: 2.5rem;
  max-width: 700px; margin: 0 auto; text-align: center;
}
.statement-block p { color: #aabbcc; font-size: 1.05rem; line-height: 1.9; margin-bottom: 1rem; }
.statement-block p:last-child { margin-bottom: 0; }
.statement-block strong { color: #10BCF7; }
.statement-block .lead { font-size: 1.2rem; color: #ccddee; }

/* ===== Process Cards (服务流程) ===== */
.process-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem; max-width: 1000px; margin: 0 auto;
}
.process-card {
  background: linear-gradient(135deg, rgba(16,188,247,0.04), rgba(10,37,64,0.2));
  border: 1px solid rgba(16,188,247,0.1);
  border-radius: 14px; padding: 1.8rem;
  transition: all 0.3s; position: relative;
}
.process-card:hover { border-color: rgba(16,188,247,0.3); transform: translateY(-3px); }
.process-card .step-badge {
  display: inline-block; padding: 0.3rem 0.9rem;
  background: linear-gradient(135deg, #10BCF7, #0a8ec2);
  color: #fff; border-radius: 20px; font-size: 0.8rem; font-weight: 700;
  margin-bottom: 1rem;
}
.process-card h4 { color: #fff; font-size: 1.1rem; margin-bottom: 0.6rem; }
.process-card p { color: #8899aa; font-size: 0.9rem; margin-bottom: 0.8rem; }
.process-card .output {
  padding: 0.6rem 1rem; background: rgba(16,188,247,0.06);
  border-radius: 8px; border: 1px solid rgba(16,188,247,0.1);
  color: #10BCF7; font-size: 0.85rem; font-weight: 500;
}

/* ===== Role Cards (责任边界) ===== */
.role-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.2rem; max-width: 1000px; margin: 0 auto;
}
.role-card {
  background: linear-gradient(135deg, rgba(16,188,247,0.03), rgba(10,37,64,0.15));
  border: 1px solid rgba(16,188,247,0.08);
  border-radius: 14px; padding: 1.8rem;
}
.role-card .role-title { color: #10BCF7; font-weight: 600; font-size: 1rem; margin-bottom: 0.3rem; }
.role-card .role-sub { color: #667788; font-size: 0.85rem; margin-bottom: 0.8rem; }
.role-card ul { color: #8899aa; font-size: 0.9rem; padding-left: 1.2rem; }
.role-card li { margin-bottom: 0.3rem; }

/* ===== Section with bg variation ===== */
.section-alt { background: linear-gradient(180deg, #0a0e1a 0%, #0d111c 100%); }
.section-dark { background: transparent; }

/* ===== Grid Column Variations ===== */
.card-grid.three-col { grid-template-columns: repeat(3, 1fr); }
.card-grid.four-col { grid-template-columns: repeat(4, 1fr); }
.card-grid.two-col { grid-template-columns: repeat(2, 1fr); }

/* ===== Card Link ===== */
.card-link { display: block; position: relative; cursor: pointer; text-decoration: none; }
.card-link:hover { border-color: rgba(16,188,247,0.3); transform: translateY(-3px); }
.card-link .card-arrow { position: absolute; right: 1.5rem; top: 50%; transform: translateY(-50%); font-size: 1.5rem; color: #10BCF7; opacity: 0; transition: opacity 0.3s; }
.card-link:hover .card-arrow { opacity: 1; }
.card-link h3 { font-size: 1.3rem; margin-bottom: 0.6rem; color: #fff; }
.card-link p { color: #8899aa; font-size: 0.95rem; line-height: 1.7; }

/* ===== Lead Form (CTA) ===== */
.lead-form input { font-family: inherit; }
.lead-form input::placeholder { color: #556677; }

/* ===== Text Block ===== */
.text-block { max-width: 700px; margin: 0 auto; }
.text-block-center { text-align: center; }

/* ===== Section Desc ===== */
.section-desc { margin-bottom: 1.5rem; }

/* ===== Problem Grid (yuanmubiao page) ===== */
.problem-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1rem; }
  .section-title { font-size: 1.6rem; }
  .page-hero h1 { font-size: 1.8rem; }
  .footer-inner { grid-template-columns: 1fr; }
  .nav-inner { gap: 1rem; overflow-x: auto; }
  .nav-inner a { font-size: 0.85rem; white-space: nowrap; }
  .card-grid.three-col { grid-template-columns: 1fr; }
  .card-grid.four-col { grid-template-columns: repeat(2, 1fr); }
  .problem-grid { grid-template-columns: 1fr; }
  .intro-features { grid-template-columns: repeat(2, 1fr); }
}