:root {
  color-scheme: light;
  --ink: #14171a;
  --muted: #5f6870;
  --line: #d9dee1;
  --paper: #f7f8f6;
  --paper-muted: #eef2f0;
  --surface: #ffffff;
  --surface-soft: #f3f6f4;
  --white: #ffffff;
  --graphite: #20262a;
  --teal: #0f8b8d;
  --teal-strong: #0b7779;
  --teal-soft: rgba(15, 139, 141, 0.12);
  --green: #4f8a5b;
  --amber: #c58b2b;
  --coral: #c9654d;
  --blue: #467b9c;
  --shadow: 0 24px 70px rgba(20, 23, 26, 0.13);
  --card-shadow: 0 12px 38px rgba(20, 23, 26, 0.08);
  --header-text: #151b1d;
  --header-muted: rgba(21, 27, 29, 0.62);
  --header-line: rgba(21, 27, 29, 0.1);
  --header-bg: rgba(255, 255, 255, 0.72);
  --header-gradient: linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.44));
  --theme-border: rgba(21, 27, 29, 0.14);
  --theme-bg: rgba(255, 255, 255, 0.64);
  --theme-text: rgba(21, 27, 29, 0.66);
  --theme-active-bg: #151b1d;
  --theme-active-text: #ffffff;
  --hero-text: #12191b;
  --hero-copy: rgba(18, 25, 27, 0.72);
  --hero-eyebrow: #0f8b8d;
  --hero-bg:
    radial-gradient(ellipse at 78% 42%, rgba(15, 139, 141, 0.18), transparent 35%),
    linear-gradient(125deg, #fbfefd 0%, #eef6f3 46%, #e8efea 100%);
  --hero-grid: rgba(18, 40, 42, 0.07);
  --hero-soft-line: rgba(18, 40, 42, 0.16);
  --hero-panel-fill: rgba(255, 255, 255, 0.42);
  --hero-panel-stroke: rgba(18, 40, 42, 0.16);
  --hero-panel-line: rgba(18, 40, 42, 0.22);
  --hero-node-fill: #0f8b8d;
  --hero-node-stroke: rgba(255, 255, 255, 0.92);
  --hero-stack-fill: rgba(15, 139, 141, 0.08);
  --hero-stack-stroke: rgba(15, 139, 141, 0.34);
  --hero-shade:
    linear-gradient(90deg, rgba(251, 254, 253, 0.96) 0%, rgba(251, 254, 253, 0.84) 34%, rgba(251, 254, 253, 0.28) 70%, rgba(251, 254, 253, 0.08) 100%),
    linear-gradient(180deg, rgba(251, 254, 253, 0) 0%, rgba(247, 248, 246, 0.88) 100%);
  --footer-bg: #111517;
  --contact-bg: #20262a;
  --contact-muted: rgba(255, 255, 255, 0.72);
}

[data-theme="dark"] {
  color-scheme: dark;
  --ink: #eef3f2;
  --muted: #a6b2b4;
  --line: rgba(229, 238, 236, 0.14);
  --paper: #0d1113;
  --paper-muted: #111819;
  --surface: #151b1d;
  --surface-soft: #192123;
  --graphite: #e4ebea;
  --teal: #75d2cc;
  --teal-strong: #5cc2bc;
  --teal-soft: rgba(117, 210, 204, 0.14);
  --green: #9dcc9b;
  --amber: #ddb15f;
  --coral: #df907f;
  --blue: #8ab9d4;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.32);
  --card-shadow: 0 16px 48px rgba(0, 0, 0, 0.24);
  --header-text: #ffffff;
  --header-muted: rgba(255, 255, 255, 0.72);
  --header-line: rgba(255, 255, 255, 0.08);
  --header-bg: rgba(7, 10, 11, 0.62);
  --header-gradient: linear-gradient(180deg, rgba(10, 14, 16, 0.72), rgba(10, 14, 16, 0.18));
  --theme-border: rgba(255, 255, 255, 0.18);
  --theme-bg: rgba(255, 255, 255, 0.1);
  --theme-text: rgba(255, 255, 255, 0.72);
  --theme-active-bg: #ffffff;
  --theme-active-text: #071012;
  --hero-text: #ffffff;
  --hero-copy: rgba(255, 255, 255, 0.82);
  --hero-eyebrow: #76d4d1;
  --hero-bg:
    radial-gradient(ellipse at 78% 42%, rgba(15, 139, 141, 0.22), transparent 34%),
    linear-gradient(125deg, #090d0f 0%, #11191b 46%, #1c231f 100%);
  --hero-grid: rgba(255, 255, 255, 0.055);
  --hero-soft-line: rgba(255, 255, 255, 0.16);
  --hero-panel-fill: rgba(255, 255, 255, 0.055);
  --hero-panel-stroke: rgba(255, 255, 255, 0.16);
  --hero-panel-line: rgba(255, 255, 255, 0.26);
  --hero-node-fill: #75d2cc;
  --hero-node-stroke: rgba(255, 255, 255, 0.72);
  --hero-stack-fill: rgba(117, 210, 204, 0.08);
  --hero-stack-stroke: rgba(117, 210, 204, 0.42);
  --hero-shade:
    linear-gradient(90deg, rgba(8, 12, 14, 0.94) 0%, rgba(8, 12, 14, 0.78) 34%, rgba(8, 12, 14, 0.28) 70%, rgba(8, 12, 14, 0.12) 100%),
    linear-gradient(180deg, rgba(8, 12, 14, 0.08) 0%, rgba(8, 12, 14, 0.86) 100%);
  --footer-bg: #090c0d;
  --contact-bg: #131b1d;
  --contact-muted: rgba(255, 255, 255, 0.7);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  transition: background-color 220ms ease, color 220ms ease;
}

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

.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 14px clamp(18px, 4vw, 56px);
  color: var(--header-text);
  border-bottom: 1px solid var(--header-line);
  background:
    var(--header-gradient),
    var(--header-bg);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  --mark-b-offset: -3px;
  --mark-z-offset: 3px;
  --mark-underline-bottom: -8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1px;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  background: #050607;
  color: #ffffff;
  font-size: 15px;
  font-weight: 860;
  letter-spacing: 0;
  backdrop-filter: blur(16px);
}

.brand-mark span {
  display: inline-block;
  line-height: 1;
}

.brand-mark .mark-b {
  position: relative;
  transform: translateY(var(--mark-b-offset));
}

.brand-mark .mark-b::after {
  content: "";
  position: absolute;
  left: 1px;
  right: 1px;
  bottom: var(--mark-underline-bottom);
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.brand-mark .mark-z {
  transform: translateY(var(--mark-z-offset));
}

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

.brand strong {
  font-size: 17px;
  line-height: 1.1;
}

.brand small {
  margin-top: 2px;
  color: var(--header-muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.5vw, 32px);
  margin-left: auto;
  color: var(--header-muted);
  font-size: 14px;
}

.nav-links a {
  padding: 8px 0;
  border-bottom: 1px solid transparent;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--header-text);
  border-color: currentColor;
}

.theme-switcher {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--theme-border);
  border-radius: 8px;
  background: var(--theme-bg);
}

.theme-switcher button {
  min-width: 42px;
  height: 30px;
  border: 0;
  border-radius: 6px;
  color: var(--theme-text);
  background: transparent;
  font: inherit;
  font-size: 13px;
  font-weight: 760;
  cursor: pointer;
}

.theme-switcher button:hover,
.theme-switcher button:focus-visible,
.theme-switcher button.is-active {
  color: var(--theme-active-text);
  background: var(--theme-active-bg);
}

.hero {
  position: relative;
  display: grid;
  align-items: center;
  min-height: 92svh;
  overflow: hidden;
  color: var(--hero-text);
  background: var(--hero-bg);
}

.hero-visual,
.hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-visual {
  color: rgba(117, 210, 204, 0.72);
  opacity: 0.92;
}

.hero-drawing {
  width: 100%;
  height: 100%;
  display: block;
}

.drawing-base {
  fill: transparent;
}

.drawing-grid {
  fill: none;
  stroke: var(--hero-grid);
  stroke-width: 1;
}

.drawing-line {
  fill: none;
  stroke-linecap: round;
  stroke-width: 2;
}

.drawing-line.main-line {
  stroke: url(#trace-gradient);
}

.drawing-line.soft-line {
  stroke: var(--hero-soft-line);
}

.drawing-panels rect {
  fill: var(--hero-panel-fill);
  stroke: var(--hero-panel-stroke);
  stroke-width: 1.2;
}

.drawing-panel-lines path {
  fill: none;
  stroke: var(--hero-panel-line);
  stroke-linecap: round;
  stroke-width: 2;
}

.drawing-nodes circle {
  fill: var(--hero-node-fill);
  stroke: var(--hero-node-stroke);
  stroke-width: 2;
}

.drawing-stack path {
  fill: var(--hero-stack-fill);
  stroke: var(--hero-stack-stroke);
  stroke-width: 1.4;
}

.hero-shade {
  background: var(--hero-shade);
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  opacity: 0.8;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(720px, calc(100% - 36px));
  margin-left: clamp(18px, 8vw, 112px);
  padding-top: 72px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--hero-eyebrow);
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.12;
}

h1 {
  max-width: 680px;
  font-size: clamp(42px, 7vw, 82px);
  font-weight: 760;
}

.hero-copy {
  max-width: 660px;
  margin: 26px 0 0;
  color: var(--hero-copy);
  font-size: clamp(17px, 2vw, 22px);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 760;
  line-height: 1.2;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  color: var(--white);
  background: var(--teal);
  box-shadow: 0 12px 30px rgba(15, 139, 141, 0.3);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--teal-strong);
}

.button-ghost {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.32);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
}

.section,
.section-band,
.contact-section {
  padding: clamp(68px, 9vw, 124px) 0;
}

.section-inner {
  width: min(1160px, calc(100% - 36px));
  margin: 0 auto;
}

.intro {
  background:
    linear-gradient(180deg, var(--surface) 0%, var(--paper) 100%);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(280px, 1fr);
  gap: clamp(32px, 7vw, 96px);
  align-items: end;
}

.intro h2,
.section-heading h2,
.contact-panel h2 {
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 760;
}

.intro p:last-child,
.section-heading p:last-child,
.contact-panel p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.section-heading {
  max-width: 680px;
  margin-bottom: 36px;
}

.section-heading h2 {
  margin-bottom: 18px;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.capability-card {
  min-height: 300px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--card-shadow);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.capability-card:hover {
  transform: translateY(-3px);
  border-color: rgba(15, 139, 141, 0.32);
  box-shadow: var(--shadow);
}

.icon-chip {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 34px;
  border-radius: 8px;
  color: var(--teal);
  background: var(--teal-soft);
}

.icon-chip.amber {
  color: var(--amber);
  background: rgba(197, 139, 43, 0.14);
}

.icon-chip.green {
  color: var(--green);
  background: rgba(79, 138, 91, 0.14);
}

.icon-chip.blue {
  color: var(--blue);
  background: rgba(70, 123, 156, 0.13);
}

.icon-chip.coral {
  color: var(--coral);
  background: rgba(201, 101, 77, 0.13);
}

.icon-chip svg {
  width: 25px;
  height: 25px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.capability-card h3 {
  margin-bottom: 12px;
  font-size: 20px;
}

.capability-card p {
  margin: 0;
  color: var(--muted);
}

.section-muted {
  background:
    radial-gradient(circle at 12% 18%, rgba(15, 139, 141, 0.08), transparent 34%),
    var(--paper-muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.2fr);
  gap: clamp(36px, 7vw, 92px);
  align-items: start;
}

.sticky-heading {
  position: sticky;
  top: 104px;
  margin-bottom: 0;
}

.solution-list {
  display: grid;
  gap: 12px;
}

.solution-list article {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 22px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.solution-list article:last-child {
  border-bottom: 1px solid var(--line);
}

.solution-list span {
  color: var(--amber);
  font-size: 14px;
  font-weight: 820;
}

.solution-list h3 {
  margin-bottom: 10px;
  font-size: clamp(22px, 2.4vw, 30px);
}

.solution-list p {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.method-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.method-rail div {
  min-height: 208px;
  padding: 28px;
  border-right: 1px solid var(--line);
}

.method-rail div:last-child {
  border-right: 0;
}

.method-rail strong {
  display: block;
  margin-bottom: 28px;
  color: var(--graphite);
  font-size: 24px;
}

.method-rail p {
  margin: 0;
  color: var(--muted);
}

.faq-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.74fr) minmax(0, 1.26fr);
  gap: clamp(36px, 7vw, 92px);
  align-items: start;
}

.faq-layout .section-heading {
  position: sticky;
  top: 104px;
  margin-bottom: 0;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-list article {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--card-shadow);
}

.faq-list h3 {
  margin-bottom: 12px;
  color: var(--graphite);
  font-size: clamp(20px, 2vw, 26px);
}

.faq-list p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.faq-list a {
  color: var(--teal);
  font-weight: 760;
  overflow-wrap: anywhere;
}

.faq-list a:hover,
.faq-list a:focus-visible {
  color: var(--teal-strong);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.contact-section {
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(15, 139, 141, 0.22), rgba(197, 139, 43, 0.16)),
    var(--contact-bg);
}

.contact-panel {
  max-width: min(1160px, calc(100% - 36px));
}

.contact-panel .section-kicker {
  color: #85dad7;
}

.contact-panel h2 {
  margin-bottom: 18px;
}

.contact-panel p {
  max-width: 680px;
  color: var(--contact-muted);
}

.contact-email {
  display: inline-flex;
  max-width: 100%;
  margin-top: 26px;
  padding-bottom: 6px;
  border-bottom: 2px solid rgba(133, 218, 215, 0.6);
  color: #ffffff;
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

.contact-email:hover,
.contact-email:focus-visible {
  color: #85dad7;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(18px, 4vw, 56px);
  color: rgba(255, 255, 255, 0.68);
  background: var(--footer-bg);
  font-size: 14px;
  line-height: 20px;
}

.site-footer > div {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 5px;
}

.icp-link,
.beian-icon-wrap {
  margin-left: 13px;
}

.site-footer > div > span,
.site-footer > span,
.icp-link,
.beian-link {
  display: inline-flex;
  align-items: center;
  min-height: 20px;
  line-height: 20px;
  white-space: nowrap;
}

.beian-icon-wrap {
  display: inline-flex;
  align-items: center;
  height: 20px;
  flex: 0 0 18px;
  justify-content: center;
}

.beian-icon {
  display: block;
  width: 18px;
  height: 20px;
  object-fit: contain;
}

.beian-link:hover,
.beian-link:focus-visible,
.icp-link:hover,
.icp-link:focus-visible {
  color: var(--white);
}

@media (max-width: 980px) {
  .capability-grid,
  .method-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .method-rail div:nth-child(2) {
    border-right: 0;
  }

  .method-rail div:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .split,
  .intro-grid,
  .faq-layout {
    grid-template-columns: 1fr;
  }

  .sticky-heading,
  .faq-layout .section-heading {
    position: static;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: absolute;
    align-items: center;
    gap: 12px;
    min-height: 0;
  }

  .nav-links {
    display: none;
  }

  .brand-mark {
    --mark-b-offset: -3px;
    --mark-z-offset: 3px;
    --mark-underline-bottom: -8px;
    width: 36px;
    height: 36px;
  }

  .theme-switcher button {
    min-width: 38px;
    height: 28px;
    font-size: 12px;
  }

  .hero {
    min-height: 88svh;
  }

  .hero-visual {
    transform: translateX(-18%) scale(1.16);
    transform-origin: center;
  }

  .hero-shade {
    background: var(--hero-shade);
  }

  .hero-content {
    width: min(100% - 36px, 620px);
    margin: 0 auto;
  }

  .hero-actions,
  .contact-panel {
    align-items: stretch;
  }

  .button {
    width: 100%;
  }

  .capability-grid,
  .method-rail,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .capability-card {
    min-height: 0;
  }

  .method-rail div,
  .method-rail div:nth-child(2) {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .method-rail div:last-child {
    border-bottom: 0;
  }

  .solution-list article {
    grid-template-columns: 44px 1fr;
    gap: 14px;
  }

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

}

@media (max-width: 460px) {
  .brand small {
    display: none;
  }

  .brand strong {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}