:root {
  --navy: #0f2a43;
  --navy-deep: #0a1c2e;
  --blue: #1d6fb8;
  --blue-bright: #2f8fe0;
  --teal: #0e7c86;
  --ink: #22313f;
  --muted: #5c6b78;
  --line: #e3e8ee;
  --bg-soft: #f4f7fa;
  --white: #ffffff;
  --shadow: 0 10px 30px rgba(15, 42, 67, .08);
  --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  line-height: 1.7;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(15,42,67,.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--navy), var(--blue));
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 17px; color: var(--navy); letter-spacing: .5px; }
.brand-text small { font-size: 10px; color: var(--muted); letter-spacing: 1.2px; }

.main-nav { display: flex; align-items: center; gap: 26px; }
.main-nav a { font-size: 15px; color: var(--ink); transition: color .2s; }
.main-nav a:hover { color: var(--blue); }
.main-nav .nav-cta {
  background: var(--navy);
  color: #fff;
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 14px;
}
.main-nav .nav-cta:hover { background: var(--blue); color: #fff; }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  width: 40px; height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--navy); border-radius: 2px; transition: .25s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: #fff;
  padding: 150px 0 110px;
  overflow: hidden;
  background: var(--navy-deep);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 480px at 85% -10%, rgba(47,143,224,.35), transparent 60%),
    radial-gradient(700px 420px at -10% 110%, rgba(14,124,134,.28), transparent 60%),
    linear-gradient(160deg, var(--navy-deep) 0%, var(--navy) 60%, #14395e 100%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .5;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.6), transparent 75%);
}

.hero-inner { position: relative; z-index: 1; max-width: 780px; }

.hero-tag {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 2.5px;
  color: #9ec9ef;
  border: 1px solid rgba(158,201,239,.35);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 26px;
}

.hero h1 { font-size: clamp(30px, 5vw, 46px); font-weight: 700; letter-spacing: 1px; line-height: 1.25; }

.hero-sub {
  margin-top: 18px;
  font-size: clamp(17px, 2.4vw, 21px);
  color: #dbe7f3;
  line-height: 1.6;
}

.hero-points {
  margin-top: 20px;
  font-size: 14px;
  color: #a9c3da;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.hero-points i { width: 4px; height: 4px; border-radius: 50%; background: #5f8db5; }

.hero-actions { margin-top: 36px; display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  transition: all .2s;
}
.btn-primary { background: var(--blue-bright); color: #fff; }
.btn-primary:hover { background: #5aa5e8; transform: translateY(-2px); }
.btn-ghost { border: 1px solid rgba(255,255,255,.45); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.1); }

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-soft); }

.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head .section-no {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--blue);
  margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(26px, 3.6vw, 34px); color: var(--navy); letter-spacing: .5px; }
.section-head p { margin-top: 14px; color: var(--muted); font-size: 16px; }
.section-head.light h2 { color: #fff; }
.section-head.light p { color: #c7d7e6; }
.section-head.light .section-no { color: #7fb8e8; }

.section-footnote {
  margin-top: 40px;
  padding: 20px 26px;
  background: var(--bg-soft);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 15px;
}

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 26px; }

.about-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 30px;
  box-shadow: var(--shadow);
}
.about-card h3 { font-size: 19px; color: var(--navy); margin-bottom: 22px; }

.info-list div { display: flex; padding: 13px 0; border-bottom: 1px dashed var(--line); gap: 16px; }
.info-list div:last-child { border-bottom: 0; }
.info-list dt { flex: 0 0 88px; color: var(--muted); font-size: 14px; }
.info-list dd { flex: 1; font-size: 14.5px; color: var(--ink); }

.fact-list { counter-reset: fact; }
.fact-list li { position: relative; padding: 14px 0 14px 52px; }
.fact-list li::before {
  counter-increment: fact;
  content: counter(fact);
  position: absolute;
  left: 0; top: 16px;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  color: var(--blue);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}
.fact-list strong { font-size: 15.5px; color: var(--navy); }
.fact-list p { margin-top: 5px; font-size: 14.5px; color: var(--muted); }

.founder {
  margin-top: 28px;
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  background: var(--navy);
  border-radius: var(--radius);
  overflow: hidden;
  color: #e7eef6;
}
.founder-photo img { width: 100%; height: 100%; object-fit: cover; min-height: 320px; }
.founder-text { padding: 40px 42px; }
.founder-text h3 { font-size: 21px; color: #fff; margin-bottom: 12px; }
.founder-intro { font-size: 15.5px; color: #cfe0ee; }
.founder-list { margin-top: 18px; }
.founder-list li {
  position: relative;
  padding: 9px 0 9px 22px;
  font-size: 14.5px;
  color: #c7d7e6;
}
.founder-list li::before { content: ""; position: absolute; left: 0; top: 19px; width: 9px; height: 9px; border-radius: 2px; background: var(--blue-bright); transform: rotate(45deg); }
.founder-list strong { color: #fff; }
.founder blockquote {
  margin: 22px 0 0;
  padding: 18px 22px;
  border-left: 3px solid var(--blue-bright);
  background: rgba(255,255,255,.07);
  border-radius: 0 10px 10px 0;
  font-size: 15px;
  color: #eaf2f9;
}
.founder-note { margin-top: 20px; font-size: 14px; color: #a9c0d5; }

/* ---------- Services ---------- */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.service-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 30px;
  box-shadow: var(--shadow);
  transition: transform .25s, box-shadow .25s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(15,42,67,.12); }

.service-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px; height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(29,111,184,.12), rgba(14,124,134,.12));
  margin-bottom: 20px;
  position: relative;
}
.service-card h3 { font-size: 18px; color: var(--navy); margin-bottom: 16px; }
.service-card ul li {
  position: relative;
  padding: 7px 0 7px 20px;
  font-size: 14.5px;
  color: var(--muted);
}
.service-card ul li::before {
  content: "";
  position: absolute;
  left: 2px; top: 16px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--blue-bright);
}

/* CSS-only service icons */
.icon-voice i {
  position: absolute;
  width: 18px; height: 18px;
  border: 3px solid var(--blue);
  border-radius: 50%;
  animation: pulse 2.2s ease-in-out infinite;
}
.icon-voice i:nth-child(2) { width: 26px; height: 26px; border-color: var(--teal); animation-delay: .7s; }

.icon-pointcloud i {
  position: absolute;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--blue);
}
.icon-pointcloud i:nth-child(1) { left: 10px; top: 10px; }
.icon-pointcloud i:nth-child(2) { right: 10px; top: 16px; background: var(--teal); width: 6px; height: 6px; }
.icon-pointcloud i:nth-child(3) { left: 22px; bottom: 10px; background: var(--blue-bright); }
.icon-pointcloud::before, .icon-pointcloud::after {
  content: "";
  position: absolute;
  background: var(--line);
  height: 2px;
}
.icon-pointcloud::before { width: 18px; left: 12px; top: 26px; transform: rotate(24deg); }
.icon-pointcloud::after { width: 14px; right: 12px; top: 24px; transform: rotate(-30deg); }

.icon-text i {
  width: 26px; height: 30px;
  border: 3px solid var(--blue);
  border-radius: 4px;
  position: relative;
}
.icon-text i::before {
  content: "";
  position: absolute;
  left: 5px; right: 5px; top: 7px;
  height: 2px;
  background: var(--teal);
  box-shadow: 0 6px 0 var(--teal), 0 12px 0 var(--teal);
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: .9; }
  50% { transform: scale(1.12); opacity: .5; }
}

.quality {
  margin-top: 40px;
  background: var(--navy);
  border-radius: var(--radius);
  padding: 34px 36px;
  color: #fff;
}
.quality h3 { font-size: 18px; margin-bottom: 22px; }
.quality ol { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.quality li { position: relative; padding-left: 44px; }
.quality li::before {
  content: "";
  position: absolute;
  left: 0; top: 2px;
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 2px solid var(--blue-bright);
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235aa5e8' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E") center/14px no-repeat;
}
.quality strong { display: block; font-size: 15.5px; }
.quality span { display: block; margin-top: 4px; font-size: 13.5px; color: #b9cfe2; }

/* ---------- Cases ---------- */
.case-list { display: flex; flex-direction: column; gap: 16px; }
.case-row {
  display: grid;
  grid-template-columns: 64px 1fr 240px;
  gap: 24px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 30px;
  transition: box-shadow .2s, transform .2s;
}
.case-row:hover { box-shadow: var(--shadow); transform: translateX(4px); }

.case-index {
  font-size: 34px;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--blue);
}
.case-body h3 { font-size: 17px; color: var(--navy); }
.case-body em { font-style: normal; font-size: 13px; color: var(--blue); background: rgba(29,111,184,.08); padding: 2px 10px; border-radius: 999px; }
.case-body p:last-of-type { margin-top: 8px; font-size: 14.5px; color: var(--muted); }
.case-cap { font-size: 13.5px; color: var(--muted); border-left: 2px solid var(--line); padding-left: 18px; }
.case-cap strong { display: block; color: var(--navy); font-size: 13px; margin-bottom: 4px; }

/* ---------- Resources ---------- */
.resource-flow {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 36px;
  box-shadow: var(--shadow);
}
.resource-flow h3 { font-size: 18px; color: var(--navy); margin-bottom: 26px; }

.flow-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  counter-reset: flow;
}
.flow-list li {
  position: relative;
  text-align: center;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 26px 10px 18px;
  font-size: 15px;
  color: var(--navy);
}
.flow-list li::before {
  counter-increment: flow;
  content: counter(flow);
  position: absolute;
  top: -12px; left: 50%;
  transform: translateX(-50%);
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.flow-list li:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -14px; top: 50%;
  width: 14px; height: 2px;
  background: var(--line);
}
.flow-note { margin-top: 22px; font-size: 14.5px; color: var(--muted); }

.resource-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 26px; }
.resource-grid.external { margin-top: 26px; }
.resource-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 32px;
  box-shadow: var(--shadow);
}
.resource-card h3 { font-size: 17.5px; color: var(--navy); margin-bottom: 16px; }
.resource-card p { font-size: 14.5px; color: var(--muted); margin-bottom: 10px; }
.resource-card ul li {
  position: relative;
  padding: 8px 0 8px 20px;
  font-size: 14.5px;
  color: var(--muted);
}
.resource-card ul li::before { content: ""; position: absolute; left: 2px; top: 17px; width: 7px; height: 7px; border-radius: 2px; background: var(--teal); transform: rotate(45deg); }
.resource-card ul strong { color: var(--navy); }

/* ---------- Philosophy ---------- */
.philosophy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.philosophy-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 38px 30px 30px;
  box-shadow: var(--shadow);
}
.philosophy-no {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--blue);
}
.philosophy-card h3 { font-size: 17px; color: var(--navy); margin: 12px 0 12px; }
.philosophy-card p { font-size: 14.5px; color: var(--muted); }

.philosophy-quote {
  margin-top: 36px;
  text-align: center;
  font-size: 19px;
  color: var(--navy);
  padding: 26px 30px;
  background: var(--bg-soft);
  border-radius: var(--radius);
  font-weight: 500;
}

/* ---------- Contact ---------- */
.contact {
  background:
    radial-gradient(800px 400px at 90% 0%, rgba(47,143,224,.25), transparent 60%),
    linear-gradient(160deg, var(--navy-deep), var(--navy));
}
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.contact-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius);
  padding: 34px 36px;
  color: #e7eef6;
}
.contact-card h3 { font-size: 18px; color: #fff; margin-bottom: 22px; }
.contact-list li { display: flex; gap: 20px; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.1); font-size: 15px; }
.contact-list li:last-child { border-bottom: 0; }
.contact-list span { flex: 0 0 56px; color: #9fb8cd; font-size: 14px; }
.contact-list strong { color: #fff; }
.contact-list a { color: #cfe4f5; }
.contact-list a:hover { color: #fff; text-decoration: underline; }

.biz-line { font-size: 26px; font-weight: 600; color: #fff; line-height: 1.5; letter-spacing: 1px; }
.biz-note { margin-top: 20px; font-size: 14px; color: #a9c0d5; line-height: 1.9; }

/* ---------- Footer ---------- */
.site-footer { background: #081420; color: #7e93a6; padding: 34px 0; }
.footer-inner { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 13.5px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .about-grid, .resource-grid, .contact-grid, .founder { grid-template-columns: 1fr; }
  .service-grid, .philosophy-grid { grid-template-columns: 1fr 1fr; }
  .flow-list { grid-template-columns: repeat(3, 1fr); row-gap: 18px; }
  .quality ol { grid-template-columns: 1fr; gap: 18px; }
  .case-row { grid-template-columns: 56px 1fr; }
  .case-cap { grid-column: 1 / -1; border-left: 0; padding-left: 0; border-top: 1px solid var(--line); padding-top: 14px; }
  .founder-photo img { min-height: 240px; max-height: 340px; }
}

@media (max-width: 640px) {
  .section { padding: 72px 0; }
  .service-grid, .philosophy-grid { grid-template-columns: 1fr; }
  .flow-list { grid-template-columns: repeat(2, 1fr); }
  .flow-list li:not(:last-child)::after { display: none; }
  .hero { padding: 120px 0 80px; }
  .main-nav {
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0 6% 20px;
    border-bottom: 1px solid var(--line);
    display: none;
    box-shadow: 0 20px 40px rgba(15,42,67,.1);
  }
  .main-nav.open { display: flex; }
  .main-nav a { display: block; width: 100%; padding: 14px 0; border-bottom: 1px solid var(--line); }
  .main-nav .nav-cta { margin-top: 16px; text-align: center; border: 0; }
  .nav-toggle { display: flex; }
  .case-row { grid-template-columns: 44px 1fr; padding: 22px 20px; gap: 14px; }
  .case-index { font-size: 26px; }
  .founder-text, .resource-card, .about-card, .service-card, .philosophy-card { padding: 26px 22px; }
  .contact-card { padding: 26px 22px; }
  .quality { padding: 28px 22px; }
  .footer-inner { flex-direction: column; }
}