:root {
  --bg: #f6f7fb;
  --text: #101827;
  --muted: #667085;
  --dark: #101827;
  --line: rgba(16, 24, 39, 0.12);
  --primary: #d71920;
  --primary-dark: #a70f16;
  --gold: #d6a95a;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(16, 24, 39, 0.14);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(16, 24, 39, 0.86);
  backdrop-filter: blur(16px);
}

.nav {
  width: min(1180px, calc(100% - 32px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: var(--white);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), #fb8c00);
  font-weight: 800;
  box-shadow: 0 10px 30px rgba(215, 25, 32, 0.35);
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: rgba(255, 255, 255, 0.68);
  font-size: 12px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
}

.nav-menu a {
  color: rgba(255, 255, 255, 0.78);
}

.nav-menu a:hover {
  color: #fff;
}

.nav-toggle {
  display: none;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  padding: 8px 14px;
  color: #fff;
  background: transparent;
}

.section {
  padding: 92px 0;
}

.hero {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
  background: radial-gradient(circle at 75% 25%, rgba(215, 25, 32, 0.38), transparent 28%), linear-gradient(135deg, #0b101b 0%, #111827 54%, #1f2937 100%);
}

.hero-bg::before,
.hero-bg::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(2px);
  opacity: 0.42;
}

.hero-bg::before {
  width: 520px;
  height: 520px;
  right: -150px;
  top: 80px;
  background: linear-gradient(135deg, rgba(215, 25, 32, 0.85), rgba(214, 169, 90, 0.2));
}

.hero-bg::after {
  width: 760px;
  height: 160px;
  left: 12%;
  bottom: 90px;
  transform: skewX(-22deg);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.7fr);
  align-items: center;
  gap: 56px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--gold);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.035em;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
}

.lead {
  max-width: 660px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
}

.btn.primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 16px 34px rgba(215, 25, 32, 0.3);
}

.btn.primary:hover {
  background: var(--primary-dark);
}

.btn.ghost {
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: #fff;
}

.hero-card {
  position: relative;
  min-height: 360px;
  padding: 34px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 28px;
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.06));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-glow {
  position: absolute;
  width: 180px;
  height: 180px;
  right: -50px;
  top: -40px;
  border-radius: 50%;
  background: rgba(214, 169, 90, 0.55);
  filter: blur(20px);
}

.hero-card p,
.hero-card h2,
.hero-card ul {
  position: relative;
}

.hero-card p {
  color: var(--gold);
  font-weight: 800;
  letter-spacing: 0.2em;
}

.hero-card h2 {
  font-size: 36px;
}

.hero-card ul {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.hero-card li {
  padding: 14px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.82);
}

.split {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 60px;
}

.content {
  color: var(--muted);
  font-size: 18px;
}

.soft {
  background: #fff;
}

.section-head {
  max-width: 760px;
  margin-bottom: 36px;
}

.section-head p:last-child {
  color: var(--muted);
}

.section-head.compact {
  margin-bottom: 26px;
}

.cards,
.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.product-card,
.feature,
.contact-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 12px 42px rgba(16, 24, 39, 0.06);
}

.product-card {
  min-height: 260px;
  padding: 28px;
}

.product-card p,
.feature p {
  color: var(--muted);
}

/* ── 套餐卡片 ── */
.package-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.package-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: #f0f1f5;
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
}

.tag-hot {
  background: var(--primary);
  color: #fff;
}

.tag-trial {
  background: var(--gold);
  color: var(--dark);
}

.package-price {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary);
}

.package h3 {
  font-size: 19px;
  margin-bottom: 8px;
}

/* ── 2 列卡片网格 ── */
.cards-wide {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

/* ── 子标题 ── */
.section-subhead {
  margin: 36px 0 12px;
  font-size: 24px;
  letter-spacing: -0.02em;
}

.muted-note {
  color: var(--muted);
  max-width: 760px;
  margin-bottom: 24px;
}

/* ── 增值服务 ── */
.extra-services {
  margin-top: 42px;
}

.extra-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.extra-item {
  display: grid;
  gap: 6px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 6px 24px rgba(16, 24, 39, 0.04);
}

.extra-item strong {
  font-size: 15px;
}

.extra-item span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

/* ── 5 项优势网格 ── */
.features-wide {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.feature-num {
  display: inline-block;
  margin-bottom: 12px;
  font-size: 13px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 0.08em;
}

.feature {
  padding: 24px;
}

.cta {
  color: #fff;
  background: linear-gradient(135deg, #111827, #1f2937);
}

.cta .eyebrow {
  color: var(--gold);
}

.cta p {
  color: rgba(255, 255, 255, 0.72);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 42px;
  align-items: start;
}

.contact-card {
  display: grid;
  gap: 12px;
  padding: 28px;
  color: var(--text);
  font-style: normal;
}

.contact-card a {
  color: var(--primary);
  font-weight: 700;
}

.site-footer {
  padding: 28px 0;
  color: rgba(255, 255, 255, 0.66);
  background: #0b101b;
  font-size: 14px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

.footer-inner p {
  margin: 0;
}

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

@media (max-width: 860px) {
  .nav {
    min-height: 66px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-menu {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 70px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    border-radius: 18px;
    background: rgba(16, 24, 39, 0.96);
  }

  .nav-menu.open {
    display: flex;
  }

  .hero {
    min-height: auto;
  }

  .section {
    padding: 68px 0;
  }

  .hero-grid,
  .split,
  .contact-grid,
  .cards,
  .features,
  .cards-wide,
  .features-wide,
  .extra-grid {
    grid-template-columns: 1fr;
  }

  .hero-card {
    min-height: 280px;
  }

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

@media (max-width: 520px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .brand small {
    display: none;
  }

  h1 {
    font-size: 38px;
  }

  .hero-card,
  .product-card,
  .package,
  .feature,
  .contact-card,
  .extra-item {
    border-radius: 20px;
    padding: 22px;
  }
}