:root {
  --navy: #071727;
  --navy-2: #0b2440;
  --blue: #1266ff;
  --cyan: #49d8ff;
  --orange: #ff8a1d;
  --gold: #d9ad68;
  --ink: #122033;
  --muted: #69778a;
  --line: rgba(255,255,255,.16);
  --soft: #f4f7fb;
  --card: #ffffff;
  --shadow: 0 26px 80px rgba(7, 23, 39, .16);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  background: #f7f9fc;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  height: 78px;
  padding: 0 clamp(22px, 5vw, 72px);
  color: white;
  background: rgba(5, 17, 32, .88);
  backdrop-filter: blur(22px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 248px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 15px;
  font-weight: 900;
  letter-spacing: -.04em;
  background: linear-gradient(135deg, var(--orange), var(--blue));
  box-shadow: 0 12px 28px rgba(18,102,255,.35);
}

.brand strong { display: block; font-size: 18px; letter-spacing: .02em; }
.brand em { display: block; margin-top: 3px; color: rgba(255,255,255,.58); font-size: 10px; letter-spacing: .16em; font-style: normal; }

.desktop-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 2vw, 30px);
  flex: 1;
  color: rgba(255,255,255,.82);
  font-size: 14px;
}

.desktop-nav a { transition: .2s; }
.desktop-nav a:hover { color: #fff; }

.header-cta {
  padding: 12px 20px;
  border-radius: 999px;
  color: white;
  background: linear-gradient(135deg, #ff7a18, #ffb14b);
  box-shadow: 0 14px 34px rgba(255,122,24,.28);
  white-space: nowrap;
}

.section-dark {
  color: white;
  background: var(--navy);
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: calc(100vh - 78px);
  padding: clamp(56px, 8vw, 112px) clamp(22px, 5vw, 72px);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 10%, rgba(73,216,255,.16), transparent 34%),
    radial-gradient(circle at 88% 20%, rgba(255,138,29,.17), transparent 30%),
    linear-gradient(135deg, rgba(8,27,48,.98), rgba(6,16,29,.96));
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .24;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 58px 58px;
  mask-image: linear-gradient(to bottom, #000, transparent 88%);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(420px, .98fr);
  align-items: center;
  gap: clamp(38px, 5vw, 78px);
  max-width: 1380px;
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.eyebrow.dark { color: #1f67d6; }

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 6.2vw, 82px);
  line-height: 1.04;
  letter-spacing: -.055em;
}

.hero-lead {
  max-width: 720px;
  color: rgba(255,255,255,.78);
  font-size: clamp(17px, 1.45vw, 21px);
  line-height: 1.85;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 800;
}

.btn-primary { background: linear-gradient(135deg, var(--orange), #ffb45c); color: #111; }
.btn-ghost { border: 1px solid var(--line); color: white; background: rgba(255,255,255,.05); }

.trust-row {
  display: grid;
  grid-template-columns: repeat(4, max-content);
  gap: 12px;
  margin-top: 34px;
}

.trust-row span {
  padding: 10px 14px;
  border-radius: 999px;
  color: rgba(255,255,255,.86);
  background: rgba(255,255,255,.08);
  border: 1px solid var(--line);
}

.hero-visual {
  position: relative;
  isolation: isolate;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 8% -8% -8% 14%;
  z-index: -1;
  border-radius: 36px;
  background: linear-gradient(135deg, rgba(18,102,255,.38), rgba(255,138,29,.16));
  filter: blur(8px);
}

.hero-visual img {
  width: 100%;
  height: min(72vh, 760px);
  object-fit: cover;
  object-position: center;
  border-radius: 34px;
  border: 1px solid rgba(255,255,255,.2);
  box-shadow: 0 40px 100px rgba(0,0,0,.42);
}

.hero-card {
  position: absolute;
  right: 28px;
  bottom: 28px;
  width: min(390px, calc(100% - 56px));
  padding: 22px 24px;
  border-radius: 22px;
  color: white;
  background: rgba(7,23,39,.78);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255,255,255,.18);
}

.hero-card strong { display: block; margin-bottom: 8px; font-size: 18px; }
.hero-card span { color: rgba(255,255,255,.72); line-height: 1.65; }

.benchmark {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 34px;
  align-items: center;
  max-width: 1260px;
  margin: -46px auto 0;
  padding: 34px 38px;
  position: relative;
  z-index: 3;
  background: white;
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.benchmark h2, .section-title h2, .case-copy h2, .seo-section h2, .contact h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 3.3vw, 48px);
  line-height: 1.14;
  letter-spacing: -.04em;
}

.benchmark p, .section-title p, .case-copy p, .seo-section p, .contact p {
  color: var(--muted);
  line-height: 1.85;
}

.section {
  max-width: 1320px;
  margin: 0 auto;
  padding: clamp(70px, 8vw, 112px) clamp(22px, 5vw, 36px);
}

.section-title {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(260px, .55fr);
  gap: 38px;
  align-items: end;
  margin-bottom: 34px;
}

.project-grid {
  display: grid;
  grid-template-columns: 1.35fr repeat(2, 1fr);
  gap: 18px;
}

.project-card {
  min-height: 238px;
  padding: 28px;
  border-radius: 28px;
  background:
    linear-gradient(145deg, rgba(255,255,255,.96), rgba(245,248,252,.98));
  box-shadow: 0 20px 55px rgba(18,32,51,.09);
  border: 1px solid rgba(18,32,51,.08);
}

.project-card.big {
  grid-row: span 2;
  min-height: 494px;
  padding: 0;
  overflow: hidden;
  color: white;
  background: var(--navy);
  position: relative;
}

.project-card.big img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .82;
}

.project-card.big::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(5,17,32,.96), transparent 58%);
}

.project-card.big div {
  position: absolute;
  left: 28px;
  right: 28px;
  bottom: 26px;
  z-index: 2;
}

.project-card span {
  display: inline-flex;
  margin-bottom: 16px;
  color: var(--orange);
  font-weight: 900;
}

.project-card h3 {
  margin-bottom: 14px;
  font-size: 25px;
  letter-spacing: -.03em;
}

.project-card p { color: #5f6f83; line-height: 1.78; }
.project-card.big p { color: rgba(255,255,255,.74); }

.product-section {
  max-width: none;
  background: #edf3fb;
}

.product-section > * {
  max-width: 1320px;
  margin-left: auto;
  margin-right: auto;
}

.product-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.product-strip article {
  overflow: hidden;
  border-radius: 30px;
  background: white;
  box-shadow: 0 24px 60px rgba(18,32,51,.1);
}

.product-strip img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center;
}

.product-strip h3 {
  margin: 24px 24px 10px;
  font-size: 22px;
}

.product-strip p {
  margin: 0 24px 28px;
  color: var(--muted);
  line-height: 1.7;
}

.cases {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 46px;
  align-items: center;
}

.case-copy ul {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.case-copy li {
  margin: 12px 0;
  padding: 16px 18px;
  border-radius: 16px;
  background: white;
  box-shadow: 0 14px 40px rgba(18,32,51,.07);
}

.case-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.case-gallery figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  border-radius: 32px;
  min-height: 560px;
  background: var(--navy);
  box-shadow: var(--shadow);
}

.case-gallery figure:nth-child(2) { transform: translateY(58px); }

.case-gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .9;
}

.case-gallery figcaption {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 22px;
  padding: 18px 20px;
  color: white;
  font-size: 20px;
  font-weight: 900;
  border-radius: 20px;
  background: rgba(7,23,39,.74);
  backdrop-filter: blur(16px);
}

.region-section {
  max-width: none;
  color: white;
  background:
    linear-gradient(135deg, rgba(5,17,32,.96), rgba(8,38,70,.95)),
    radial-gradient(circle at top right, rgba(18,102,255,.5), transparent 45%);
}

.region-section > * {
  max-width: 1320px;
  margin-left: auto;
  margin-right: auto;
}

.region-section .section-title p { color: rgba(255,255,255,.68); }
.region-section .eyebrow { color: var(--cyan); }

.matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.matrix div {
  min-height: 220px;
  padding: 26px;
  border-radius: 26px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
}

.matrix strong {
  display: block;
  margin-bottom: 18px;
  color: #fff;
  font-size: 22px;
}

.matrix span {
  color: rgba(255,255,255,.74);
  line-height: 1.85;
}

.seo-section {
  display: grid;
  grid-template-columns: .68fr 1.32fr;
  gap: 36px;
  align-items: start;
}

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

.article-list a {
  padding: 24px 28px;
  border-radius: 22px;
  background: white;
  font-weight: 800;
  box-shadow: 0 16px 42px rgba(18,32,51,.08);
  border: 1px solid rgba(18,32,51,.07);
}

.contact {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 44px;
  max-width: 1320px;
  margin: 0 auto clamp(70px, 8vw, 110px);
  padding: clamp(38px, 5vw, 58px);
  border-radius: 38px;
  color: white;
  background:
    linear-gradient(135deg, rgba(8,27,48,.96), rgba(9,47,80,.96)),
    radial-gradient(circle at bottom left, rgba(255,138,29,.32), transparent 40%);
  box-shadow: var(--shadow);
}

.contact p { color: rgba(255,255,255,.7); }

.inquiry-form {
  display: grid;
  gap: 14px;
}

.inquiry-form label {
  display: grid;
  gap: 8px;
  color: rgba(255,255,255,.74);
  font-weight: 800;
}

.inquiry-form input,
.inquiry-form textarea {
  width: 100%;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 16px;
  padding: 15px 16px;
  color: white;
  background: rgba(255,255,255,.08);
  outline: none;
  font: inherit;
}

.inquiry-form textarea { min-height: 118px; resize: vertical; }

.inquiry-form input::placeholder,
.inquiry-form textarea::placeholder { color: rgba(255,255,255,.42); }

.inquiry-form button {
  height: 54px;
  border: 0;
  border-radius: 18px;
  color: #111;
  background: linear-gradient(135deg, #ff8a1d, #ffc46b);
  font-weight: 900;
  font-size: 17px;
  cursor: pointer;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 30px clamp(22px, 5vw, 72px) 90px;
  color: rgba(255,255,255,.62);
  background: #071727;
}

.mobile-bar { display: none; }

@media (max-width: 980px) {
  .site-header {
    height: 66px;
    padding: 0 16px;
  }

  .brand { min-width: auto; }
  .brand em, .desktop-nav, .header-cta { display: none; }
  .brand strong { font-size: 16px; }
  .brand-mark { width: 40px; height: 40px; border-radius: 13px; }

  .hero {
    min-height: auto;
    padding: 38px 16px 58px;
  }

  .hero-grid,
  .benchmark,
  .section-title,
  .cases,
  .seo-section,
  .contact {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 39px;
    line-height: 1.08;
  }

  .hero-lead {
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-visual img {
    height: 520px;
    border-radius: 26px;
  }

  .hero-card {
    position: static;
    width: auto;
    margin-top: 12px;
  }

  .trust-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .benchmark {
    margin: 0 16px;
    padding: 26px;
    border-radius: 24px;
  }

  .section {
    padding: 62px 16px;
  }

  .project-grid,
  .product-strip,
  .matrix {
    grid-template-columns: 1fr;
  }

  .project-card.big { min-height: 460px; }
  .project-card { min-height: auto; }

  .case-gallery {
    grid-template-columns: 1fr;
  }

  .case-gallery figure {
    min-height: 520px;
  }

  .case-gallery figure:nth-child(2) {
    transform: none;
  }

  .contact {
    margin: 0 16px 84px;
    padding: 28px;
    border-radius: 28px;
  }

  footer {
    display: grid;
    padding: 28px 16px 92px;
  }

  .mobile-bar {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: 12px;
    z-index: 30;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    padding: 8px;
    border-radius: 22px;
    background: rgba(7,23,39,.9);
    backdrop-filter: blur(18px);
    box-shadow: 0 18px 50px rgba(0,0,0,.28);
  }

  .mobile-bar a {
    display: grid;
    place-items: center;
    min-height: 46px;
    border-radius: 16px;
    color: white;
    font-weight: 900;
    background: rgba(255,255,255,.08);
  }

  .mobile-bar a:last-child {
    color: #111;
    background: linear-gradient(135deg, #ff8a1d, #ffc46b);
  }
}

@media (max-width: 520px) {
  .hero-visual img,
  .case-gallery figure {
    height: auto;
    min-height: 0;
    aspect-ratio: 9 / 14;
  }

  .product-strip img {
    aspect-ratio: 16 / 12;
  }
}