/* ===== 资管分仓系统官网 - FinTech 专业风格 ===== */
:root {
  --color-bg: #0d1117;
  --color-bg-card: #161b22;
  --color-bg-elevated: #21262d;
  --color-border: #30363d;
  --color-text: #e6edf3;
  --color-text-muted: #8b949e;
  --color-primary: #238636;
  --color-primary-hover: #2ea043;
  --color-accent: #58a6ff;
  --color-accent-gold: #d4a853;
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
  --transition: 0.2s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: #79b8ff;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ----- Header ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  letter-spacing: 0.02em;
}
.logo:hover {
  color: var(--color-text);
}

.logo-mark {
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
}

.logo-type {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.logo-word {
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--color-text);
}

.logo-sub {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

@media (max-width: 420px) {
  .logo-sub {
    display: none;
  }
}

.nav {
  display: flex;
  gap: 28px;
}
.nav a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}
.nav a:hover {
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 8px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.1rem;
}

@media (max-width: 768px) {
  .nav {
    display: none;
  }
  .nav-toggle {
    display: block;
  }
  .nav.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-card);
    padding: 16px;
    border-bottom: 1px solid var(--color-border);
  }
}

/* ----- Banner ----- */
.banner {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 100px;
  overflow: hidden;
}

.banner-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(145deg, #0d1117 0%, #161b22 40%, #1a2332 100%);
  background-image: 
    linear-gradient(180deg, transparent 0%, rgba(36, 134, 54, 0.06) 100%),
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(88, 166, 255, 0.08) 0%, transparent 60%);
}
.banner-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
}

.banner-title {
  margin: 0 0 20px;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.banner-desc {
  margin: 0 0 32px;
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.banner-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-outline:hover {
  background: var(--color-bg-elevated);
  border-color: var(--color-text-muted);
}

.btn-block {
  width: 100%;
}

/* ----- Sections ----- */
.section {
  padding: 72px 0;
  border-bottom: 1px solid var(--color-border);
}
.section:last-of-type {
  border-bottom: none;
}

.section-title {
  margin: 0 0 16px;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.section-lead {
  margin: 0 0 40px;
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 680px;
  line-height: 1.7;
}

/* ----- 产品简介 ----- */
.section-intro {
  background: var(--color-bg);
}

.intro-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.intro-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.intro-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow);
}

.intro-card-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 12px;
}

.intro-card h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
}

.intro-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ----- 系统架构 ----- */
.section-arch {
  background: var(--color-bg-card);
}

.arch-diagram {
  margin: 40px 0 24px;
  padding: 40px 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.arch-center {
  text-align: center;
  margin-bottom: 36px;
  padding: 20px;
  font-weight: 600;
  color: var(--color-accent);
  font-size: 1rem;
  line-height: 1.5;
}

.arch-nodes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.arch-node {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.arch-node-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.arch-node h4 {
  margin: 0 0 4px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
}

.arch-node p {
  margin: 0 0 12px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.arch-node-role {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.arch-note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ----- 核心功能 ----- */
.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.feature-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}
.feature-item:last-child {
  border-bottom: none;
}

.feature-item h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
}

.feature-item p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ----- 量化对接 ----- */
.section-quant {
  background: var(--color-bg-card);
}

.quant-list {
  margin: 0 0 20px;
  padding-left: 1.4rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.quant-note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-style: italic;
}

/* ----- 适用场景 ----- */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.scenario-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.scenario-card h4 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
}

.scenario-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ----- 产品优势 ----- */
.section-advantages {
  background: var(--color-bg);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.advantage-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.advantage-card h4 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent-gold);
}

.advantage-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ----- 部署流程 ----- */
.section-deploy {
  background: var(--color-bg-card);
}

.deploy-steps {
  margin: 32px 0 0;
  padding-left: 1.5rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.deploy-steps li {
  margin-bottom: 12px;
}

.deploy-steps strong {
  color: var(--color-text);
}

/* ----- 联系我们 ----- */
.contact-box {
  margin-top: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

@media (max-width: 768px) {
  .contact-box {
    grid-template-columns: 1fr;
  }
}

.contact-info {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.contact-info p {
  margin: 0 0 12px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}
.contact-info p:last-child {
  margin-bottom: 0;
}

.contact-info a {
  color: var(--color-accent);
}

.contact-box-tg {
  grid-template-columns: 1fr;
  justify-items: center;
  text-align: center;
}

.contact-box-tg .contact-info {
  max-width: 360px;
}

.contact-qr {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.contact-qr img {
  display: block;
  border-radius: 12px;
  padding: 12px;
  background: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.contact-qr-hint {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-row label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
}

.form-row input,
.form-row textarea {
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}
.form-row input::placeholder,
.form-row textarea::placeholder {
  color: var(--color-text-muted);
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-row textarea {
  resize: vertical;
  min-height: 100px;
}

/* ----- Footer ----- */
.site-footer {
  padding: 32px 24px;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0 0 8px;
}
.footer-note {
  font-size: 0.8rem;
  opacity: 0.8;
}