:root {
  --ink: #061014;
  --ink-soft: #27363c;
  --paper: #f6f9fb;
  --paper-2: #eaf2f5;
  --line: rgba(6, 16, 20, 0.12);
  --cyan: #07e0c4;
  --blue: #2f75ff;
  --lime: #d8ff68;
  --deep: #061014;
  --deep-2: #0b1b22;
  --muted: #5c6b72;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  margin: 0;
}

img {
  display: block;
  max-width: 100%;
}

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

button {
  font: inherit;
}

.skip-link {
  background: var(--ink);
  border-radius: 0 0 10px 0;
  color: #fff;
  font-weight: 800;
  left: 0;
  padding: 12px 18px;
  position: fixed;
  top: 0;
  transform: translateY(-120%);
  transition: transform 0.2s ease;
  z-index: 60;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  align-items: center;
  color: var(--ink);
  display: flex;
  height: 72px;
  justify-content: space-between;
  left: 0;
  padding: 0 clamp(18px, 5vw, 72px);
  position: fixed;
  right: 0;
  top: 0;
  transition: background 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
  z-index: 20;
}

.site-header.scrolled {
  backdrop-filter: blur(18px);
  background: rgba(246, 249, 251, 0.84);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 18px 50px rgba(6, 16, 20, 0.08);
}

.brand {
  align-items: center;
  display: flex;
  font-size: 17px;
  font-weight: 800;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  align-items: center;
  background: linear-gradient(135deg, var(--cyan), #96ffe9);
  border-radius: 12px;
  color: #031012;
  display: inline-flex;
  flex: 0 0 auto;
  font-size: 12px;
  height: 34px;
  justify-content: center;
  width: 34px;
}

.desktop-nav {
  align-items: center;
  display: flex;
  gap: clamp(22px, 3vw, 42px);
  font-size: 14px;
  font-weight: 700;
}

.desktop-nav a {
  opacity: 0.78;
  transition: opacity 0.2s ease, color 0.2s ease;
}

.desktop-nav a:hover {
  color: var(--blue);
  opacity: 1;
}

.nav-action,
.primary-button,
.secondary-button {
  align-items: center;
  border-radius: 999px;
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.nav-action {
  border: 1px solid rgba(6, 16, 20, 0.22);
  font-size: 14px;
  white-space: nowrap;
}

.nav-toggle {
  align-items: center;
  background: transparent;
  border: 0;
  cursor: pointer;
  display: none;
  flex-direction: column;
  gap: 5px;
  height: 44px;
  justify-content: center;
  padding: 0 8px;
  width: 44px;
}

.nav-toggle span {
  background: var(--ink);
  border-radius: 2px;
  height: 2px;
  transition: transform 0.24s ease, opacity 0.2s ease;
  width: 24px;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  backdrop-filter: blur(18px);
  background: rgba(246, 249, 251, 0.97);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 18px 50px rgba(6, 16, 20, 0.1);
  display: flex;
  flex-direction: column;
  gap: 4px;
  left: 0;
  padding: 12px clamp(16px, 5vw, 48px) 22px;
  position: fixed;
  right: 0;
  top: 72px;
  z-index: 19;
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav a {
  border-bottom: 1px solid var(--line);
  font-size: 17px;
  font-weight: 700;
  padding: 16px 2px;
}

.mobile-nav .mobile-nav-action {
  border: 0;
  color: var(--blue);
}

.primary-button {
  background: var(--ink);
  color: #ffffff;
}

.secondary-button {
  border: 1px solid rgba(6, 16, 20, 0.22);
  color: var(--ink);
}

.nav-action:hover,
.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-2px);
}

.hero {
  display: grid;
  gap: clamp(32px, 7vw, 88px);
  grid-template-columns: minmax(0, 0.95fr) minmax(340px, 1.05fr);
  min-height: 100svh;
  overflow: hidden;
  padding: 132px clamp(20px, 6vw, 86px) 74px;
  position: relative;
}

.hero-grid-bg {
  background:
    linear-gradient(rgba(47, 117, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 117, 255, 0.07) 1px, transparent 1px),
    linear-gradient(135deg, rgba(7, 224, 196, 0.2), rgba(255, 255, 255, 0) 38%),
    linear-gradient(315deg, rgba(47, 117, 255, 0.16), rgba(255, 255, 255, 0) 44%);
  background-size: 48px 48px, 48px 48px, auto, auto;
  inset: 0;
  position: absolute;
}

.hero::after {
  background: linear-gradient(90deg, rgba(246, 249, 251, 0.96), rgba(246, 249, 251, 0.7) 48%, rgba(246, 249, 251, 0.92));
  content: "";
  inset: 0;
  position: absolute;
}

.hero-content,
.hero-visual {
  position: relative;
  z-index: 1;
}

.hero-content {
  align-self: center;
  max-width: 760px;
}

.eyebrow,
.section-kicker {
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  margin: 0 0 18px;
  text-transform: uppercase;
}

.hero h1,
h2,
h3 {
  letter-spacing: 0;
  margin: 0;
}

.hero h1 {
  font-size: clamp(48px, 6.4vw, 88px);
  line-height: 1.02;
  max-width: 620px;
}

.hero h1 span {
  display: block;
}

.hero-lede {
  color: var(--ink-soft);
  font-size: clamp(19px, 2vw, 25px);
  line-height: 1.72;
  margin: 30px 0 0;
  max-width: 640px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.hero-visual {
  align-self: center;
}

/* Hero 右侧：私有化部署架构卡（取自真实交付项目的部署结构） */
.hero-arch {
  background: linear-gradient(160deg, rgba(6, 16, 20, 0.97), rgba(11, 27, 34, 0.95));
  border: 1px solid rgba(7, 224, 196, 0.28);
  border-radius: 18px;
  box-shadow: 0 34px 90px rgba(21, 56, 84, 0.22);
  color: #eafffb;
  margin-left: auto;
  padding: 22px;
  width: min(100%, 560px);
}

.arch-head {
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  gap: 12px;
  justify-content: space-between;
  padding-bottom: 16px;
}

.arch-head strong {
  font-size: 16px;
  font-weight: 800;
}

.arch-status {
  align-items: center;
  color: rgba(234, 255, 251, 0.7);
  display: inline-flex;
  flex: 0 0 auto;
  font-size: 12px;
  gap: 7px;
}

.arch-status i {
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(7, 224, 196, 0.18);
  height: 8px;
  width: 8px;
}

.arch-flow {
  display: grid;
  padding-top: 20px;
}

.arch-node,
.arch-layer {
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  padding: 14px 16px;
}

.arch-node {
  background: rgba(255, 255, 255, 0.05);
}

.arch-node strong {
  display: block;
  font-size: 15px;
  margin-top: 4px;
}

.arch-kicker {
  color: var(--cyan);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.arch-layer.core {
  background: rgba(7, 224, 196, 0.08);
  border-color: rgba(7, 224, 196, 0.34);
}

.arch-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.arch-chips span {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  padding: 7px 12px;
}

.arch-chips span.hot {
  background: var(--lime);
  color: var(--ink);
  font-weight: 800;
}

.arch-link {
  align-items: center;
  display: flex;
  gap: 12px;
  min-height: 30px;
  padding-left: 18px;
}

.arch-link::before {
  background: linear-gradient(var(--cyan), rgba(7, 224, 196, 0.12));
  content: "";
  height: 18px;
  width: 2px;
}

.arch-link span {
  color: rgba(234, 255, 251, 0.55);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.arch-foot {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(234, 255, 251, 0.66);
  font-size: 12px;
  line-height: 1.6;
  margin-top: 18px;
  padding-top: 16px;
}

section {
  padding: clamp(76px, 10vw, 138px) clamp(20px, 6vw, 86px);
}

.position-section {
  background: var(--paper);
}

.split-heading {
  align-items: end;
  display: grid;
  gap: clamp(28px, 6vw, 92px);
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
}

h2 {
  font-size: clamp(38px, 5vw, 74px);
  line-height: 1.03;
}

h3 {
  font-size: clamp(28px, 3.4vw, 50px);
  line-height: 1.08;
}

p {
  color: var(--muted);
  line-height: 1.78;
}

.split-heading p,
.solution-copy p,
.proof-copy p,
.contact-inner p {
  font-size: 18px;
  margin: 0;
}

.solution-section {
  display: grid;
  gap: clamp(34px, 7vw, 94px);
  grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr);
}

.solution-section.light {
  background: var(--paper-2);
}

.solution-section.dark {
  background: var(--deep);
  color: #f4fffb;
}

.solution-section.dark p {
  color: rgba(244, 255, 251, 0.72);
}

.solution-copy {
  align-self: center;
}

.value-list {
  display: grid;
  gap: 0;
  margin-top: 34px;
}

.value-list span {
  border-top: 1px solid var(--line);
  color: var(--ink);
  font-weight: 800;
  padding: 16px 0;
}

.dark .value-list span {
  border-color: rgba(255, 255, 255, 0.16);
  color: #f4fffb;
}

.architecture-strip {
  align-self: center;
  border-top: 1px solid var(--line);
}

.architecture-strip div {
  align-items: center;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 24px;
  grid-template-columns: 0.42fr 1fr;
  min-height: 108px;
}

.architecture-strip small {
  color: var(--blue);
  font-weight: 900;
  text-transform: uppercase;
}

.architecture-strip strong {
  font-size: clamp(24px, 3vw, 42px);
}

.product-scene {
  align-self: center;
  align-items: start;
  display: grid;
  gap: clamp(16px, 2.4vw, 36px);
  grid-template-columns: minmax(0, 1fr) minmax(180px, 0.62fr);
}

.product-scene picture {
  display: block;
  min-width: 0;
}

.product-main,
.product-float {
  background: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.36);
  display: block;
  /* 按自然比例完整显示，不裁切：height:auto 让宽度驱动高度，
     否则 HTML 的 height 属性会锁死盒子高度、使图片被 object-fit 裁掉。 */
  height: auto;
  width: 100%;
}

.inspection-stage {
  align-self: center;
  display: grid;
  gap: 16px;
  grid-template-columns: 0.9fr 1.1fr;
}

.inspection-stage img {
  height: 460px;
  object-fit: cover;
  width: 100%;
}

.inspection-caption {
  background: var(--deep);
  color: #f4fffb;
  grid-column: 1 / -1;
  padding: 28px;
}

.inspection-caption strong {
  display: block;
  font-size: 24px;
  margin-bottom: 10px;
}

.inspection-caption span {
  color: rgba(244, 255, 251, 0.72);
}

.proof-section {
  background: #ffffff;
  display: grid;
  gap: clamp(34px, 7vw, 94px);
  grid-template-columns: minmax(280px, 0.88fr) minmax(0, 1.12fr);
}

.proof-points {
  border-top: 1px solid var(--line);
}

.proof-points div {
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 20px;
  grid-template-columns: 0.16fr 0.34fr 1fr;
  padding: 28px 0;
}

.proof-points span {
  color: var(--blue);
  font-weight: 900;
}

.proof-points strong {
  font-size: 22px;
}

.proof-points p {
  margin: 0;
}

.contact-section {
  background: var(--deep);
  color: #f4fffb;
}

.contact-inner {
  max-width: 1120px;
}

.contact-inner h2 {
  max-width: 1030px;
}

.contact-inner .contact-title {
  font-size: clamp(30px, 3.4vw, 50px);
  line-height: 1.16;
  max-width: 920px;
}

.contact-inner p {
  color: rgba(244, 255, 251, 0.72);
  margin-top: 22px;
  max-width: 720px;
}

.contact-grid {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 50px;
}

.contact-grid > * {
  background: rgba(255, 255, 255, 0.08);
  border: 0;
  color: inherit;
  cursor: pointer;
  min-height: 140px;
  padding: 28px;
  text-align: left;
  transition: background 0.2s ease, transform 0.2s ease;
}

.contact-grid > *:hover {
  background: rgba(7, 224, 196, 0.14);
  transform: translateY(-2px);
}

.contact-grid span {
  color: rgba(244, 255, 251, 0.58);
  display: block;
  margin-bottom: 14px;
}

.contact-grid strong {
  font-size: clamp(20px, 2.4vw, 30px);
}

.site-footer {
  align-items: center;
  background: #03090b;
  color: rgba(244, 255, 251, 0.66);
  display: flex;
  justify-content: space-between;
  padding: 24px clamp(20px, 6vw, 86px);
}

/* 默认可见；仅当 JS 运行（<html class="js">）时才隐藏并等待进入视口，避免脚本失败白屏 */
.reveal {
  transition: opacity 0.68s ease, transform 0.68s ease;
}

.js .reveal {
  opacity: 0;
  transform: translateY(22px);
}

.js .reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

.copy-status {
  color: var(--cyan);
  font-weight: 700;
  margin: 16px 0 0;
  min-height: 1.4em;
}

@media (max-width: 1020px) {
  .desktop-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero,
  .split-heading,
  .solution-section,
  .proof-section {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 116px;
  }

  .hero-visual {
    min-height: auto;
  }

  .proof-points div {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    height: 64px;
    padding: 0 16px;
  }

  .brand {
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .brand-mark {
    border-radius: 10px;
    flex: 0 0 auto;
    height: 30px;
    width: 30px;
  }

  .nav-action {
    font-size: 13px;
    min-height: 40px;
    padding: 0 14px;
  }

  .mobile-nav {
    top: 64px;
  }

  .hero {
    min-height: auto;
    padding: 108px 18px 64px;
  }

  .hero h1 {
    font-size: clamp(46px, 14vw, 64px);
  }

  .hero-actions a {
    width: 100%;
  }

  .hero-arch {
    margin-top: 8px;
  }

  section {
    padding: 66px 18px;
  }

  .architecture-strip div,
  .product-scene,
  .inspection-stage,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .product-scene picture:last-child {
    display: none;
  }

  .inspection-stage img {
    height: auto;
    max-height: 340px;
    object-fit: contain;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}