:root {
  --ink: #0f1c24;
  --ink-soft: #3d4f5c;
  --paper: #f3f6f4;
  --white: #ffffff;
  --accent: #1f7a5c;
  --accent-deep: #145c45;
  --sky: #d7ebe3;
  --line: rgba(15, 28, 36, 0.08);
  --shadow: 0 24px 60px rgba(15, 28, 36, 0.12);
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.top {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  background: linear-gradient(180deg, rgba(15, 28, 36, 0.55), transparent);
  color: #fff;
}
.brand { display: flex; align-items: baseline; gap: 8px; }
.brand-mark {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 22px;
}
.brand-sub { font-size: 15px; opacity: 0.88; }
.top-cta {
  border: 1px solid rgba(255,255,255,0.45);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  backdrop-filter: blur(8px);
  transition: background 0.25s ease, border-color 0.25s ease;
}
.top-cta:hover { background: rgba(255,255,255,0.12); border-color: #fff; }

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(20, 92, 69, 0.35), transparent 45%),
    radial-gradient(ellipse at 70% 20%, rgba(215, 235, 227, 0.25), transparent 50%),
    url("hero.jpg") center / cover no-repeat,
    linear-gradient(160deg, #16352c 0%, #0f1c24 55%, #1a2e38 100%);
  transform: scale(1.04);
  animation: hero-drift 18s ease-in-out infinite alternate;
}
.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(15, 28, 36, 0.35) 0%, rgba(15, 28, 36, 0.55) 45%, rgba(15, 28, 36, 0.78) 100%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  width: min(880px, calc(100% - 40px));
  margin: 0 auto;
  padding: 0 0 88px;
  animation: rise 0.9s ease-out both;
}
.hero-brand {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 700;
  letter-spacing: 0.06em;
}
.hero-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(34px, 6.2vw, 58px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: 0.02em;
}
.hero-lead {
  margin: 0 0 28px;
  max-width: 34em;
  font-size: clamp(16px, 2.2vw, 19px);
  color: rgba(255,255,255,0.86);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 28px rgba(31, 122, 92, 0.35);
}
.btn-primary:hover { background: var(--accent-deep); }
.btn-ghost {
  background: rgba(255,255,255,0.1);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.35);
}
.btn-block { width: 100%; }

.section { padding: 96px 0; }
.section-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.25;
  font-weight: 700;
}
.section-lead {
  margin: 0 0 40px;
  max-width: 36em;
  color: var(--ink-soft);
  font-size: 17px;
}

.pain { background: var(--white); }
.pain-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}
.pain-list li {
  display: grid;
  gap: 6px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.pain-list li.is-in {
  opacity: 1;
  transform: none;
}
.pain-list strong {
  font-size: 20px;
  font-weight: 650;
}
.pain-list span { color: var(--ink-soft); }

.product { background: linear-gradient(180deg, #eef5f1 0%, var(--paper) 100%); }
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-item {
  padding: 8px 0 0;
  border-top: 2px solid var(--accent);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.product-item.is-in {
  opacity: 1;
  transform: none;
}
.product-tag {
  margin: 0 0 10px;
  color: var(--accent-deep);
  font-size: 13px;
  letter-spacing: 0.08em;
}
.product-item h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 24px;
}
.product-item p {
  margin: 0;
  color: var(--ink-soft);
}

.highlights { background: var(--white); }
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.highlight-item {
  padding: 28px 28px 26px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease, box-shadow 0.25s ease;
}
.highlight-item.is-in {
  opacity: 1;
  transform: none;
}
.highlight-item-featured {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(31, 122, 92, 0.1), rgba(215, 235, 227, 0.55));
  border-color: rgba(31, 122, 92, 0.22);
  box-shadow: 0 16px 40px rgba(31, 122, 92, 0.1);
}
.highlight-kicker {
  margin: 0 0 10px;
  color: var(--accent-deep);
  font-size: 13px;
  letter-spacing: 0.08em;
  font-weight: 600;
}
.highlight-item h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.3;
}
.highlight-item p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.pilot { background: var(--paper); }
.pilot-layout {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 48px;
  align-items: start;
}
.pilot-steps {
  margin: 0;
  padding-left: 1.2em;
  color: var(--ink-soft);
}
.pilot-steps li { margin-bottom: 12px; }
.pilot-note {
  background: linear-gradient(160deg, #16352c, #0f1c24);
  color: #fff;
  padding: 36px 32px;
  border-radius: 4px 28px 4px 28px;
  box-shadow: var(--shadow);
}
.pilot-note-kicker {
  margin: 0 0 8px;
  opacity: 0.7;
  font-size: 13px;
  letter-spacing: 0.1em;
}
.pilot-note-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 28px;
}

.company {
  background:
    radial-gradient(circle at 15% 20%, rgba(31, 122, 92, 0.12), transparent 40%),
    var(--paper);
  text-align: center;
}
.company .section-lead,
.company .section-title { margin-left: auto; margin-right: auto; }
.motto {
  font-family: var(--font-display);
  font-size: 22px !important;
  color: var(--accent-deep) !important;
}
.company-copy {
  margin: 0 auto;
  max-width: 34em;
  color: var(--ink-soft);
}

.contact {
  background: #0f1c24;
  color: #fff;
}
.contact .section-lead { color: rgba(255,255,255,0.72); }
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.lead-form {
  display: grid;
  gap: 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 28px;
  border-radius: 16px;
}
.lead-form label { display: grid; gap: 8px; font-size: 14px; color: rgba(255,255,255,0.78); }
.lead-form input {
  width: 100%;
  height: 46px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 10px;
  padding: 0 14px;
  background: rgba(255,255,255,0.06);
  color: #fff;
  font: inherit;
}
.lead-form input::placeholder { color: rgba(255,255,255,0.35); }
.lead-form input:focus {
  outline: none;
  border-color: rgba(31, 122, 92, 0.8);
  box-shadow: 0 0 0 3px rgba(31, 122, 92, 0.25);
}
.form-hint {
  margin: 0;
  font-size: 13px;
  color: rgba(255,255,255,0.55);
}
.form-hint a { color: #9fd9c2; text-decoration: underline; }

.modal[hidden] { display: none !important; }
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 24px;
}
.modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(8, 14, 18, 0.72);
  backdrop-filter: blur(2px);
}
.modal-panel {
  position: relative;
  z-index: 1;
  width: min(420px, 100%);
  background: #fff;
  color: var(--ink);
  border-radius: 16px;
  padding: 36px 28px 28px;
  text-align: center;
  box-shadow: var(--shadow);
  animation: rise 0.28s ease-out both;
}
.modal-title {
  margin: 0 0 28px;
  font-size: 18px;
  line-height: 1.6;
  font-weight: 600;
}
.modal-ok {
  min-width: 140px;
}

.footer {
  background: #0a1419;
  color: rgba(255,255,255,0.55);
  padding: 28px 0 40px;
  font-size: 13px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}
.footer .brand-mark, .footer .brand-sub { color: #fff; }

@keyframes rise {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: none; }
}
@keyframes hero-drift {
  from { transform: scale(1.04) translate3d(0, 0, 0); }
  to { transform: scale(1.08) translate3d(-1.5%, -1%, 0); }
}

@media (max-width: 860px) {
  .product-grid,
  .highlights-grid,
  .pilot-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }
  .highlight-item-featured { grid-column: auto; }
  .hero-inner { padding-bottom: 72px; }
  .section { padding: 72px 0; }
  .top { padding: 14px 18px; }
}