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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
  "Segoe UI", sans-serif;
  color: #0f172a;
  background-color: #020617;
  line-height: 1.7; /* 行距略拉大 */
}

/* Layout helpers */
.container {
  width: 100%;
  max-width: 960px; /* 收窄版心，减少每行字数 */
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(2, 6, 23, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #e5e7eb;
  font-size: 14px;
}

.logo-mark {
  font-size: 18px;
}

.logo-sub {
  color: #facc15;
}

.nav {
  display: flex;
  gap: 20px;
}

.nav a {
  font-size: 14px;
  color: #9ca3af;
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
}

.nav a:hover {
  color: #e5e7eb;
  border-bottom-color: #facc15;
}

/* Hero */
.hero {
  padding: 72px 0 56px;
  background: radial-gradient(circle at top, #0f172a 0, #020617 55%, #000 100%);
  color: #e5e7eb;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 40px;
  align-items: flex-start;
}

.hero-copy {
  max-width: 600px; /* 文案列限制宽度，避免一行太长 */
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 11px;
  color: #9ca3af;
  margin: 0 0 10px;
}

.hero h1 {
  font-size: clamp(32px, 4vw, 40px);
  line-height: 1.15;
  margin: 0 0 18px;
  color: #f9fafb;
}

.hero-sub {
  font-size: 15px;
  margin: 0 0 26px;
  color: #d1d5db;
}

.hero-sub strong {
  color: #facc15;
}

.hero-meta {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr);
  gap: 14px;
  margin-bottom: 26px;
}

.meta-item {
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.5);
}

.meta-label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #9ca3af;
}

.meta-value {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: #f9fafb;
}

.meta-note {
  display: block;
  font-size: 12px;
  color: #9ca3af;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Hero panel image + cards */
.hero-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* HERO 图样式 */
.hero-image-wrapper {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: #020617;
}

.hero-image {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  object-position: center center;
}

.hero-card {
  padding: 14px 14px 16px;
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.6);
}

.hero-card-muted {
  background: rgba(15, 23, 42, 0.65);
  border-style: dashed;
}

.hero-card-title {
  font-size: 14px;
  font-weight: 600;
  color: #f9fafb;
  margin: 0 0 6px;
}

.hero-card-text {
  font-size: 13px;
  color: #cbd5f5;
  margin: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease,
  transform 0.05s ease;
}

.btn-primary {
  background: #facc15;
  color: #111827;
  border-color: #fbbf24;
}

.btn-primary:hover {
  background: #eab308;
  border-color: #eab308;
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: #e5e7eb;
  border-color: rgba(148, 163, 184, 0.6);
}

.btn-secondary:hover {
  background: rgba(15, 23, 42, 0.8);
  border-color: #facc15;
}

.btn-full {
  width: 100%;
}

/* Sections */
.section {
  padding: 80px 0 72px; /* 区块上下留更多白 */
  background: #020617;
  color: #e5e7eb;
}

.section-light {
  background: #020617;
}

.section-dark {
  background: #020617;
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
}

.section h2 {
  font-size: 24px;
  margin: 0 0 10px;
  color: #f9fafb;
}

.section-lead {
  font-size: 15px;
  color: #cbd5e1;
  margin: 0 0 28px;
}

/* Grid & cards */
.grid {
  display: grid;
  gap: 24px; /* 卡片间距加大 */
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: radial-gradient(circle at top, #0b1220 0, #020617 50%);
  padding: 18px 18px 20px;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 16px;
  color: #f9fafb;
}

.card p {
  font-size: 14px;
  color: #e5e7eb;
  margin: 0 0 12px;
}

/* Split layout */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 40px; /* 左右列距离更大些 */
  align-items: flex-start;
}

.split-col-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Lists */
.bullet-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.bullet-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px; /* 统一提升一点字号 */
  color: #cbd5e1;
  margin-bottom: 8px;
}

.bullet-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  top: 0;
  color: #facc15;
}

/* Panels */
.info-panel {
  border-radius: 12px;
  background: #020617;
  border: 1px solid rgba(148, 163, 184, 0.5);
  padding: 14px 16px 16px;
}

.info-panel-muted {
  background: #020617;
  border-style: dashed;
}

.info-panel-compact {
  border-radius: 12px;
  padding: 14px 16px;
}

.info-price {
  font-size: 20px;
  font-weight: 600;
  color: #facc15;
  margin: 0 0 6px;
}

.info-note {
  font-size: 14px;
  color: #e5e7eb;
  margin: 0 0 10px;
}

.info-small {
  font-size: 12px;
  color: #9ca3af;
  margin: 0;
}

.info-link a {
  font-size: 14px;
  color: #fbbf24;
  text-decoration: none;
}

.info-link a:hover {
  text-decoration: underline;
}

/* Kit blocks / notes */
.kit-block {
  margin-bottom: 18px;
}

.kit-block h3 {
  font-size: 15px;
  margin: 0 0 8px;
}

.note {
  font-size: 13px;
  color: #f97316;
  margin: 6px 0 0;
}

/* KIT 平铺图样式 */
.kit-image-wrapper {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: #020617;
  margin-bottom: 16px;
}

.kit-image {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* Contact */
.contact-meta p {
  margin: 0 0 8px;
  font-size: 14px;
  color: #e5e7eb;
}

.contact-meta a {
  color: #facc15;
  text-decoration: none;
}

.contact-meta a:hover {
  text-decoration: underline;
}

.contact-form {
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: #020617;
  padding: 16px 16px 18px;
}

.form-row {
  margin-bottom: 12px;
}

.form-row label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: #e5e7eb;
  margin-bottom: 4px;
}

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  border-radius: 8px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: #020617;
  color: #e5e7eb;
  font-size: 13px;
  padding: 7px 9px;
  outline: none;
}

.form-row input::placeholder,
.form-row textarea::placeholder {
  color: #6b7280;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: #facc15;
  box-shadow: 0 0 0 1px rgba(250, 204, 21, 0.25);
}

.form-note {
  font-size: 11px;
  color: #9ca3af;
  margin: 8px 0 0;
}

/* 新增：表单成功/失败提示 */
.form-success {
  font-size: 11px;
  color: #22c55e;
  margin: 6px 0 0;
}

.form-error {
  font-size: 11px;
  color: #f97316;
  margin: 6px 0 0;
}

/* Footer */
.site-footer {
  background: #020617;
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  color: #9ca3af;
  margin-top: 32px;
  padding-top: 20px;
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 12px;
}

.footer-brand {
  font-size: 14px;
  font-weight: 600;
  color: #e5e7eb;
  margin: 0 0 4px;
}

.footer-text {
  font-size: 12px;
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links a {
  font-size: 12px;
  color: #9ca3af;
  text-decoration: none;
}

.footer-links a:hover {
  color: #facc15;
}

.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, 0.15);
  padding: 10px 0 16px;
}

.footer-bottom p {
  margin: 0;
  font-size: 11px;
  text-align: center;
  color: #6b7280;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner,
  .split {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-inner {
    gap: 28px;
  }

  .header-inner {
    gap: 16px;
  }

  .nav {
    gap: 12px;
  }
}

@media (max-width: 720px) {
  .hero {
    padding-top: 56px;
  }

  .hero-meta {
    grid-template-columns: minmax(0, 1fr);
  }

  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner {
    flex-direction: column;
  }

  .nav {
    display: none; /* 小屏先隐藏导航，有需要再做汉堡菜单 */
  }

  .site-header {
    border-bottom-color: rgba(148, 163, 184, 0.35);
  }
}