:root {
  --red: #c90012;
  --red-dark: #97000c;
  --ink: #161616;
  --muted: #5f6268;
  --line: #dedfe3;
  --soft: #f6f6f5;
  --paper: #ffffff;
  --charcoal: #242424;
  --gold: #b18a4a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.65;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  min-height: 76px;
  padding: 12px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  width: min(250px, 38vw);
}

.brand img {
  display: block;
  width: 100%;
  height: auto;
}

.nav {
  display: flex;
  justify-content: center;
  gap: clamp(16px, 2.5vw, 34px);
  color: #373a40;
  font-size: 15px;
}

.nav a,
.header-call {
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease;
}

.nav a:hover {
  color: var(--red);
}

.header-call {
  padding: 9px 15px;
  color: var(--red);
  font-weight: 700;
  border: 1px solid rgba(201, 0, 18, 0.36);
  border-radius: 6px;
}

.header-call:hover {
  color: #fff;
  background: var(--red);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 560px);
  gap: clamp(36px, 6vw, 80px);
  align-items: center;
  min-height: calc(100vh - 76px);
  padding: clamp(56px, 8vw, 110px) clamp(20px, 6vw, 86px) clamp(40px, 6vw, 76px);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.76)),
    repeating-linear-gradient(135deg, rgba(201, 0, 18, 0.09) 0 2px, transparent 2px 22px),
    #f8f8f7;
}

.hero::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -180px;
  z-index: -1;
  width: 52vw;
  min-width: 560px;
  height: 52vw;
  min-height: 560px;
  border: 46px solid rgba(201, 0, 18, 0.08);
  transform: rotate(18deg);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--red);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(48px, 8vw, 96px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 720px;
  margin: 24px 0 0;
  color: #32343a;
  font-size: clamp(20px, 2.3vw, 30px);
  line-height: 1.45;
  font-weight: 700;
}

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

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 6px;
  font-weight: 800;
}

.primary-action {
  color: #fff;
  background: var(--red);
}

.secondary-action {
  color: var(--ink);
  border: 1px solid #bfc1c6;
  background: rgba(255, 255, 255, 0.76);
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(18px, 3vw, 34px);
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(22, 22, 22, 0.1);
  box-shadow: 0 24px 70px rgba(22, 22, 22, 0.12);
}

.hero-visual img {
  display: block;
  width: 100%;
  height: auto;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--charcoal);
  color: #fff;
}

.trust-strip div {
  min-height: 132px;
  padding: 26px clamp(18px, 3vw, 34px);
  border-right: 1px solid rgba(255, 255, 255, 0.16);
}

.trust-strip div:last-child {
  border-right: 0;
}

.trust-strip strong {
  display: block;
  color: #fff;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1;
}

.trust-strip span {
  display: block;
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 15px;
}

.section {
  padding: clamp(70px, 9vw, 120px) clamp(20px, 6vw, 86px);
}

.section-contrast {
  background: var(--soft);
}

.section-heading {
  max-width: 860px;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.section-heading h2,
.founder h2,
.contact-section h2 {
  margin: 0;
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.16;
  letter-spacing: 0;
}

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

.feature-card,
.result-grid article,
.service-list article {
  padding: clamp(24px, 3vw, 34px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.feature-index {
  display: block;
  color: var(--gold);
  font-weight: 900;
  font-size: 14px;
}

.feature-card h3,
.result-grid h3,
.service-list h3 {
  margin: 16px 0 10px;
  font-size: 23px;
  line-height: 1.25;
}

.feature-card p,
.result-grid p,
.service-list p,
.service-copy p,
.mentor-copy p,
.founder p,
.contact-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.service-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 5vw, 64px);
}

.service-copy {
  padding-left: 20px;
  border-left: 4px solid var(--red);
}

.service-list {
  display: grid;
  gap: 16px;
}

.service-list article {
  background: #fff;
}

.mentor-panel {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
}

.mentor-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 1px solid var(--line);
}

.mentor-stats div {
  min-height: 142px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.mentor-stats div:nth-child(2n) {
  border-right: 0;
}

.mentor-stats div:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.mentor-stats strong {
  display: block;
  color: var(--red);
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1;
}

.mentor-stats span {
  display: block;
  margin-top: 12px;
  color: var(--muted);
}

.mentor-copy {
  display: grid;
  gap: 18px;
}

.founder {
  padding: clamp(70px, 9vw, 120px) clamp(20px, 6vw, 86px);
  color: #fff;
  background:
    linear-gradient(90deg, rgba(22, 22, 22, 0.96), rgba(22, 22, 22, 0.72)),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.12) 0 1px, transparent 1px 18px),
    #2a2a2a;
}

.founder-copy {
  max-width: 960px;
}

.founder p {
  max-width: 860px;
  margin-top: 20px;
  color: rgba(255, 255, 255, 0.76);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(32px, 6vw, 78px);
  padding: clamp(70px, 9vw, 120px) clamp(20px, 6vw, 86px);
  background: #fff;
}

.contact-copy p {
  max-width: 660px;
  margin-top: 18px;
}

.contact-methods {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.contact-methods a,
.contact-methods div {
  min-height: 132px;
  padding: 24px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.contact-methods span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

.contact-methods strong {
  display: block;
  margin-top: 12px;
  font-size: clamp(19px, 2vw, 28px);
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(20px, 6vw, 86px);
  color: rgba(255, 255, 255, 0.74);
  background: #151515;
}

.site-footer strong,
.site-footer span {
  display: block;
}

.site-footer strong {
  color: #fff;
}

.footer-meta {
  text-align: right;
}

@media (max-width: 920px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav {
    display: none;
  }

  .hero,
  .service-layout,
  .mentor-panel,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    max-width: 560px;
  }

  .trust-strip,
  .feature-grid,
  .result-grid,
  .contact-methods {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 620px) {
  .site-header {
    min-height: 66px;
    gap: 12px;
    padding: 10px 16px;
  }

  .brand {
    width: min(190px, 52vw);
  }

  .header-call {
    padding: 8px 10px;
    font-size: 13px;
  }

  .hero {
    padding: 42px 18px 34px;
  }

  .hero h1 {
    font-size: 46px;
  }

  .hero-lead {
    font-size: 20px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-visual {
    padding: 14px;
  }

  .trust-strip,
  .feature-grid,
  .result-grid,
  .mentor-stats,
  .contact-methods {
    grid-template-columns: 1fr;
  }

  .trust-strip div {
    min-height: 104px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  }

  .trust-strip div:last-child {
    border-bottom: 0;
  }

  .mentor-stats div,
  .mentor-stats div:nth-child(2n),
  .mentor-stats div:nth-last-child(-n + 2) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .mentor-stats div:last-child {
    border-bottom: 0;
  }

  .section,
  .founder,
  .contact-section {
    padding: 58px 18px;
  }

  .section-heading h2,
  .founder h2,
  .contact-section h2 {
    font-size: 34px;
  }

  .site-footer {
    display: grid;
    padding: 24px 18px;
  }

  .footer-meta {
    text-align: left;
  }
}