:root {
  --navy: #071527;
  --navy-2: #0d2440;
  --blue: #164a96;
  --gold: #c98a2c;
  --orange: #d96f24;
  --text: #263445;
  --muted: #64748b;
  --line: #e6eaf0;
  --bg: #f6f8fb;
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(7, 21, 39, 0.09);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.72;
}

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

.container {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 21, 39, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
}

.brand-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: 10px;
  background: #ffffff;
  padding: 5px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gold), var(--orange));
  color: var(--navy);
  font-weight: 900;
}

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

.brand small {
  color: #b8c4d4;
  font-size: 12px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 26px;
  color: #dbe5f1;
  font-size: 15px;
}

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

.nav-toggle {
  display: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: transparent;
  color: var(--white);
  border-radius: 8px;
  padding: 8px 12px;
}

.section {
  padding: 92px 0;
}

.alt {
  background: var(--bg);
}

.hero {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    linear-gradient(120deg, rgba(0, 0, 0, 0.76), rgba(0, 0, 0, 0.58)),
    linear-gradient(90deg, rgba(7, 18, 32, 0.94) 0%, rgba(7, 18, 32, 0.72) 46%, rgba(7, 18, 32, 0.42) 100%),
    url("assets/hero-business-bg.jpg") center / cover no-repeat,
    radial-gradient(circle at 82% 20%, rgba(201, 138, 44, 0.24), transparent 32%);
  padding: 118px 0 94px;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 42%),
    radial-gradient(circle at 76% 22%, rgba(201, 138, 44, 0.16), transparent 30%);
}

.hero .container {
  position: relative;
  z-index: 1;
}

.page-hero {
  color: var(--white);
  background:
    linear-gradient(120deg, rgba(7, 21, 39, 0.98), rgba(13, 36, 64, 0.94)),
    radial-gradient(circle at 82% 20%, rgba(201, 138, 44, 0.2), transparent 32%);
  padding: 68px 0 58px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-hero h1 {
  max-width: 980px;
  color: var(--white);
  font-size: clamp(32px, 4.2vw, 54px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.page-hero p {
  max-width: 860px;
  color: #cbd7e7;
  font-size: 18px;
  margin-bottom: 0;
}

.breadcrumb {
  margin-bottom: 18px;
  color: #b8c4d4;
  font-size: 14px;
}

.breadcrumb a {
  color: var(--gold);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.75fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--gold);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 13px;
}

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

h1 {
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

h2 {
  color: var(--navy);
  font-size: clamp(30px, 3vw, 44px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

h3 {
  color: var(--navy);
  font-size: 21px;
  line-height: 1.35;
  margin-bottom: 10px;
}

.hero-subtitle {
  max-width: 780px;
  color: #cbd7e7;
  font-size: clamp(22px, 2.2vw, 30px);
  line-height: 1.55;
  font-weight: 650;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 800;
  border: 0;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--orange));
  color: var(--navy);
}

.btn-secondary {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-panel {
  display: grid;
  gap: 14px;
}

.hero-panel div,
.info-card,
.card,
.stat,
.case-list article,
.case-card,
.article-card,
.contact-card,
.contact-form,
details {
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.info-card,
.card,
.stat,
.case-list article,
.case-card,
.article-card,
.contact-card,
details {
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.info-card:hover,
.card:hover,
.stat:hover,
.case-list article:hover,
.case-card:hover,
.article-card:hover,
.contact-card:hover,
details:hover {
  transform: translateY(-4px);
  border-color: rgba(29, 78, 216, 0.22);
  box-shadow: 0 22px 52px rgba(15, 23, 42, 0.13);
}

.hero-panel div {
  padding: 24px;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow: none;
}

.metric-number {
  display: block;
  color: var(--gold);
  font-size: 34px;
  line-height: 1;
  font-weight: 900;
}

.metric-label {
  display: block;
  margin-top: 8px;
  color: #d9e3ef;
}

.split {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 50px;
  align-items: start;
}

.info-card {
  padding: 34px;
}

.check-list {
  padding: 0;
  margin: 22px 0 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 10px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
}

.section-head {
  max-width: 760px;
  margin-bottom: 38px;
}

.cards,
.article-grid,
.stats-grid {
  display: grid;
  gap: 22px;
}

.service-grid {
  grid-template-columns: repeat(4, 1fr);
}

.card,
.article-card {
  padding: 30px;
}

.icon {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 20px;
  border-radius: 12px;
  background: #eef4ff;
  color: var(--blue);
  font-weight: 900;
}

.proof {
  color: var(--blue);
  font-weight: 800;
}

.card-link {
  display: inline-flex;
  margin-top: 8px;
  color: var(--blue);
  font-weight: 850;
}

.stats-grid {
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 28px;
}

.stat {
  padding: 26px;
}

.stat strong {
  display: block;
  color: var(--blue);
  font-size: 38px;
  line-height: 1;
  margin-bottom: 10px;
}

.stat span {
  color: var(--muted);
}

.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 52px;
}

.hero-stat {
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.07);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.16);
}

.hero-stat strong {
  display: block;
  margin-bottom: 10px;
  color: var(--gold);
  font-size: 34px;
  line-height: 1;
}

.hero-stat span {
  color: #cbd7e8;
}

.case-sections {
  display: grid;
  gap: 64px;
}

.case-group-head {
  margin-bottom: 22px;
}

.case-group-head h2 {
  margin: 0;
  color: var(--navy);
  font-size: 38px;
  line-height: 1.15;
}

.case-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.case-list article {
  padding: 26px;
  box-shadow: none;
}

.case-card {
  display: flex;
  min-height: 290px;
  flex-direction: column;
  padding: 30px;
  color: inherit;
  text-decoration: none;
  box-shadow: none;
}

.case-list article h2 {
  font-size: 22px;
  line-height: 1.35;
  letter-spacing: 0;
}

.case-card h2,
.case-card h3,
.article-card h2,
.article-card h3 {
  font-size: 22px;
  line-height: 1.35;
  letter-spacing: 0;
}

.case-card h3 {
  display: grid;
  gap: 7px;
  margin-bottom: 22px;
}

.case-title-lead,
.case-title-rest {
  color: var(--navy);
}

.case-title-brand {
  color: var(--blue);
}

.case-title-brand,
.case-title-rest {
  display: block;
}

.case-card p,
.case-list article p,
.article-card p {
  display: -webkit-box;
  overflow: hidden;
  max-height: calc(1.7em * 3);
  line-height: 1.7;
  text-overflow: ellipsis;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

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

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

.article-row {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: transform 180ms ease, color 180ms ease;
}

.article-row:hover {
  transform: translateX(6px);
}

.article-row h2,
.article-row h3 {
  margin-bottom: 0;
  font-size: 24px;
  line-height: 1.35;
}

.article-row p {
  max-width: 900px;
  margin-bottom: 0;
  color: var(--muted);
}

.article-meta {
  color: var(--gold);
  font-size: 13px;
  font-weight: 850;
  letter-spacing: 0.05em;
}

.compact-list {
  max-width: 980px;
}

.article-card {
  display: flex;
  min-height: 260px;
  flex-direction: column;
  color: inherit;
  text-decoration: none;
  box-shadow: none;
}

.article-card a,
.case-list a,
.case-card .card-link,
.article-card .card-link {
  color: var(--blue);
  font-weight: 850;
}

.case-card .card-link,
.article-card .card-link {
  margin-top: auto;
  padding-top: 16px;
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 820px) 300px;
  gap: 34px;
  align-items: start;
}

.article-body {
  max-width: none;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 44px;
}

.article-body > *:last-child {
  margin-bottom: 0;
}

.article-body h2 {
  position: relative;
  margin: 42px 0 16px;
  padding-left: 18px;
  color: var(--navy);
  font-size: 28px;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.24em;
  width: 5px;
  height: 1.05em;
  border-radius: 99px;
  background: linear-gradient(180deg, var(--gold), var(--orange));
}

.article-body h3 {
  margin: 28px 0 12px;
  color: var(--navy);
  font-size: 21px;
}

.article-body p,
.article-body li {
  color: var(--text);
  font-size: 17px;
  line-height: 1.9;
}

.article-body p {
  margin-bottom: 18px;
}

.article-body ul,
.article-body ol {
  display: grid;
  gap: 10px;
  margin: 16px 0 22px;
  padding-left: 1.25em;
}

.article-body a {
  color: var(--blue);
  font-weight: 850;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body blockquote {
  margin: 28px 0;
  padding: 20px 24px;
  border-left: 5px solid var(--gold);
  border-radius: 12px;
  background: #fff8ee;
  color: var(--navy);
  font-weight: 750;
}

.side-box {
  position: sticky;
  top: 96px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.side-box h3 {
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.side-box p {
  color: var(--muted);
}

.side-box a {
  display: block;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  color: var(--blue);
  font-weight: 800;
}

.side-box a:last-child {
  border-bottom: 0;
}

.page-hero + .section {
  padding-top: 58px;
}

.topic-list {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.topic-list a {
  display: block;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  color: var(--navy);
  font-weight: 850;
}

.topic-list a:hover {
  border-color: rgba(22, 74, 150, 0.35);
  color: var(--blue);
}

.faq-list {
  display: grid;
  gap: 14px;
}

details {
  padding: 22px 24px;
  box-shadow: none;
}

summary {
  color: var(--navy);
  cursor: pointer;
  font-weight: 850;
}

details p {
  margin: 12px 0 0;
  color: var(--muted);
}

.contact-section {
  background: linear-gradient(180deg, var(--white), var(--bg));
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1fr;
  gap: 42px;
}

.contact-card,
.contact-form {
  padding: 30px;
}

.contact-form {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--navy);
  font-weight: 750;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid #cfd7e3;
  border-radius: 10px;
  padding: 13px 14px;
  font: inherit;
  color: var(--text);
  background: var(--white);
}

textarea {
  resize: vertical;
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.product-hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 88px;
  color: var(--white);
  background:
    linear-gradient(115deg, rgba(7, 21, 39, 0.95), rgba(13, 36, 64, 0.88)),
    radial-gradient(circle at 76% 20%, rgba(201, 138, 44, 0.24), transparent 32%),
    var(--navy);
}

.product-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1fr);
  gap: 54px;
  align-items: center;
}

.product-copy-wide {
  max-width: 980px;
}

.product-copy h1 {
  margin: 16px 0 22px;
  color: var(--white);
  font-size: clamp(42px, 5.4vw, 74px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.product-copy p {
  max-width: 650px;
  color: #cfdae8;
  font-size: 20px;
  line-height: 1.75;
}

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

.feature-matrix article,
.text-card-grid div,
.problem-grid article,
.scenario-list p,
.cta-panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.feature-matrix article,
.text-card-grid div,
.problem-grid article,
.scenario-list p {
  padding: 28px;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.feature-matrix article:hover,
.text-card-grid div:hover,
.problem-grid article:hover,
.scenario-list p:hover {
  transform: translateY(-4px);
  border-color: rgba(22, 74, 150, 0.25);
  box-shadow: 0 24px 60px rgba(7, 21, 39, 0.12);
}

.feature-matrix span {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: #fff4e3;
  color: var(--gold);
  font-weight: 900;
}

.feature-matrix h3 {
  margin: 18px 0 10px;
  color: var(--navy);
  font-size: 22px;
}

.feature-matrix p,
.problem-grid p,
.scenario-list p {
  color: var(--muted);
}

.product-text-layout {
  display: grid;
  grid-template-columns: minmax(0, 860px) 280px;
  gap: 34px;
  align-items: start;
}

.product-article {
  padding: 48px;
}

.product-side p {
  margin: 0 0 10px;
}

.text-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 26px;
}

.text-card-grid div {
  color: var(--navy);
  font-weight: 800;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.problem-grid h3 {
  margin: 0 0 10px;
  color: var(--navy);
  font-size: 23px;
}

.problem-grid p,
.scenario-list p {
  margin: 0;
}

.scenario-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.scenario-list p {
  border-left: 4px solid var(--gold);
}

.scenario-list strong {
  color: var(--navy);
}

.product-cta {
  padding-top: 0;
}

.cta-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 42px;
  background: linear-gradient(135deg, var(--navy), var(--navy-2));
  color: var(--white);
}

.cta-panel h2 {
  margin: 6px 0 10px;
  color: var(--white);
}

.cta-panel p {
  max-width: 760px;
  margin: 0;
  color: #cbd7e8;
}

.site-footer {
  padding: 34px 0;
  color: #cbd7e7;
  background: var(--navy);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.footer-grid p {
  margin-bottom: 6px;
}

@media (max-width: 980px) {
  .hero-grid,
  .split,
  .contact-grid,
  .footer-grid,
  .product-hero-grid,
  .product-text-layout {
    grid-template-columns: 1fr;
  }

  .service-grid,
  .stats-grid,
  .hero-stats-grid,
  .case-list,
  .article-grid,
  .feature-matrix,
  .text-card-grid,
  .problem-grid,
  .scenario-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .content-layout {
    grid-template-columns: 1fr;
  }

  .side-box {
    position: static;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 28px, 1160px);
  }

  .nav {
    min-height: 66px;
  }

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

  .nav-menu {
    position: absolute;
    left: 14px;
    right: 14px;
    top: 66px;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 12px;
    border-radius: 12px;
    background: var(--navy-2);
  }

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

  .nav-menu a {
    width: 100%;
    padding: 12px;
  }

  .section,
  .hero,
  .page-hero,
  .product-hero {
    padding: 64px 0;
  }

  .product-copy h1 {
    font-size: 38px;
  }

  .product-copy p {
    font-size: 17px;
  }

  .feature-matrix,
  .text-card-grid,
  .problem-grid,
  .scenario-list {
    grid-template-columns: 1fr;
  }

  .cta-panel {
    display: grid;
    padding: 28px;
  }

  .page-hero h1 {
    font-size: 31px;
  }

  .page-hero p {
    font-size: 16px;
  }

  .hero-subtitle {
    font-size: 17px;
  }

  .hero-actions,
  .btn {
    width: 100%;
  }

  .service-grid,
  .stats-grid,
  .hero-stats-grid,
  .case-list,
  .article-grid {
    grid-template-columns: 1fr;
  }

  .card,
  .case-card,
  .article-card,
  .article-body,
  .product-article,
  .contact-form,
  .contact-card,
  .info-card {
    padding: 24px;
  }

  .article-body h2 {
    font-size: 24px;
  }

  .article-body p,
  .article-body li {
    font-size: 16px;
  }
}