/**
 * ============================================================
 *  service.css · 服务页深色视觉（旧 service 专题页）
 *  区块：Hero / Intro / Chapters / Topology / Devices / Matrix / CTA
 * ============================================================
 */
.service-page {
  --service-bg: #050914;
  --service-panel: #0a1120;
  --service-panel-2: #0d1729;
  --service-line: rgba(139, 171, 222, .16);
  --service-blue: #3978ff;
  --service-cyan: #27d5ff;
  --service-copy: #9cacbf;
  background: var(--service-bg);
}

.service-page .page-main {
  overflow: hidden;
  background: var(--service-bg);
  color: #eef5ff;
}

.service-page .wrapper-wide {
  width: min(1420px, calc(100% - clamp(40px, 7vw, 128px)));
  margin-inline: auto;
}

.service-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--service-cyan);
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .2em;
  text-transform: uppercase;
}

.service-kicker::before {
  width: 24px;
  height: 1px;
  background: currentColor;
  content: "";
}

/* hero */
.service-hero {
  position: relative;
  min-height: min(800px, calc(100vh - var(--jpy-header-h)));
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(3, 7, 17, .98) 0%, rgba(3, 7, 17, .86) 46%, rgba(3, 7, 17, .55) 100%),
    url("../images/banner-service.jpg") center / cover no-repeat;
  isolation: isolate;
}

.service-hero::after {
  position: absolute;
  inset: auto 0 0;
  height: 220px;
  background: linear-gradient(180deg, transparent, var(--service-bg));
  content: "";
  z-index: -1;
}

.service-hero-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: .24;
  background-image:
    linear-gradient(rgba(99, 142, 211, .14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 142, 211, .14) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(90deg, #000, transparent 72%);
}

.service-hero-orbit {
  position: absolute;
  border: 1px solid rgba(90, 148, 255, .16);
  border-radius: 50%;
  pointer-events: none;
}

.service-hero-orbit::before {
  position: absolute;
  top: 50%;
  left: -3px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--service-cyan);
  box-shadow: 0 0 18px var(--service-cyan);
  content: "";
}

.service-hero-orbit-a {
  right: -210px;
  top: -280px;
  width: 720px;
  height: 720px;
  animation: serviceSpin 28s linear infinite;
}

.service-hero-orbit-b {
  right: 60px;
  bottom: -370px;
  width: 560px;
  height: 560px;
  animation: serviceSpin 22s linear infinite reverse;
}

.service-hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, .72fr);
  align-items: center;
  min-height: min(800px, calc(100vh - var(--jpy-header-h)));
  padding: 90px 0 86px;
}

.service-hero-copy {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.service-hero h1 {
  margin-top: 28px;
  color: #fff;
  font-size: clamp(64px, 8vw, 126px);
  font-weight: 520;
  line-height: .96;
  letter-spacing: -.07em;
}

.service-hero-copy > p {
  max-width: 620px;
  margin-top: 30px;
  color: #aab8ca;
  font-size: clamp(18px, 1.6vw, 23px);
  letter-spacing: .03em;
}

.service-hero-actions {
  display: flex;
  align-items: center;
  gap: 34px;
  margin-top: 48px;
}

.service-primary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 182px;
  height: 52px;
  padding: 0 28px;
  color: #fff;
  background: var(--service-blue);
  font-size: 14px;
  font-weight: 650;
}

.service-primary-link:hover {
  color: #fff;
  background: #548cff;
  transform: translateY(-2px);
  box-shadow: 0 16px 42px rgba(38, 105, 255, .28);
}

.service-plain-link {
  color: #d9e5f6;
  font-size: 14px;
}

.service-plain-link span {
  display: inline-block;
  margin-left: 8px;
  color: var(--service-cyan);
  transition: transform .3s ease;
}

.service-plain-link:hover span {
  transform: translate(4px, -4px);
}

.service-radar {
  position: relative;
  width: min(38vw, 500px);
  aspect-ratio: 1;
  justify-self: end;
  opacity: .88;
}

.service-radar::before,
.service-radar::after {
  position: absolute;
  top: 50%;
  left: 50%;
  background: rgba(97, 153, 255, .19);
  content: "";
  transform: translate(-50%, -50%);
}

.service-radar::before { width: 100%; height: 1px; }
.service-radar::after { width: 1px; height: 100%; }

.service-radar-ring {
  position: absolute;
  inset: 50%;
  border: 1px solid rgba(105, 160, 255, .25);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.service-radar-ring::after {
  position: absolute;
  inset: 8%;
  border-top: 1px solid rgba(39, 213, 255, .6);
  border-radius: 50%;
  content: "";
  animation: serviceSpin 8s linear infinite;
}

.service-radar .ring-1 { width: 100%; height: 100%; }
.service-radar .ring-2 { width: 68%; height: 68%; }
.service-radar .ring-3 { width: 35%; height: 35%; }

.radar-core {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 112px;
  height: 112px;
  place-content: center;
  border: 1px solid rgba(59, 122, 255, .65);
  background: rgba(7, 16, 34, .88);
  text-align: center;
  box-shadow: 0 0 70px rgba(26, 105, 255, .28);
  transform: translate(-50%, -50%) rotate(45deg);
}

.radar-core > * { transform: rotate(-45deg); }
.radar-core b { color: #fff; font-size: 32px; font-weight: 500; line-height: 1; }
.radar-core small { margin-top: 8px; color: #6e87a8; font-size: 8px; letter-spacing: .12em; }

.radar-node {
  position: absolute;
  width: 8px;
  height: 8px;
  border: 2px solid #79e7ff;
  border-radius: 50%;
  background: #081122;
  box-shadow: 0 0 20px rgba(39, 213, 255, .8);
}

.node-a { top: 16%; left: 47%; }
.node-b { top: 44%; right: 8%; }
.node-c { right: 25%; bottom: 15%; }
.node-d { left: 13%; bottom: 31%; }

.service-hero-foot {
  position: absolute;
  right: 0;
  bottom: 42px;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #53647c;
  font-size: 11px;
  letter-spacing: .14em;
}

.service-hero-foot .breadcrumb {
  display: flex;
  gap: 10px;
  margin: 0;
  color: #65758b;
}

.service-hero-foot .breadcrumb a:hover { color: #fff; }

.service-scroll-hint {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.service-scroll-hint::after {
  width: 58px;
  height: 1px;
  background: #53647c;
  content: "";
  transform-origin: left;
  animation: servicePulseLine 2.4s ease-in-out infinite;
}

/* intro and sticky index */
.service-intro {
  position: relative;
  z-index: 2;
  padding: 118px 0 112px;
  background: var(--service-bg);
  border-bottom: 1px solid var(--service-line);
}

.service-intro-grid {
  display: grid;
  grid-template-columns: 1.75fr .35fr;
  gap: 40px 4vw;
  align-items: end;
}

.service-intro-label span {
  display: block;
  color: var(--service-blue);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .18em;
}

.service-intro-label b {
  display: block;
  max-width: 300px;
  margin-top: 20px;
  color: #71829a;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.7;
}

.service-manifesto {
  max-width: 900px;
  color: #edf4ff;
  font-size: clamp(42px, 5.5vw, 82px);
  font-weight: 430;
  line-height: 1.16;
  letter-spacing: -.055em;
}

.service-index {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 34px;
  border-top: 1px solid var(--service-line);
  border-bottom: 1px solid var(--service-line);
}

.service-index a {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 74px;
  padding: 0 22px;
  border-right: 1px solid var(--service-line);
  color: #8393a8;
  font-size: 13px;
}

.service-index a:last-child { border-right: 0; }
.service-index a span { margin-right: 18px; color: #44546b; font-size: 10px; }
.service-index a::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: var(--service-cyan);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s ease;
}
.service-index a:hover,
.service-index a.is-active { color: #fff; background: rgba(58, 119, 255, .06); }
.service-index a.is-active::after { transform: scaleX(1); }

/* chapters */
.service-chapter {
  position: relative;
  min-height: 900px;
  padding: 132px 0;
  background: #060b16;
  border-bottom: 1px solid var(--service-line);
  scroll-margin-top: var(--jpy-header-h);
  isolation: isolate;
}

.service-chapter:nth-child(even) { background: #09101d; }

.service-chapter::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: .26;
  background:
    linear-gradient(90deg, transparent 49.9%, rgba(126, 160, 211, .1) 50%, transparent 50.1%),
    linear-gradient(rgba(126, 160, 211, .05) 1px, transparent 1px);
  background-size: 100% 100%, 100% 96px;
  content: "";
  pointer-events: none;
}

.service-chapter-2::after,
.service-chapter-4::after {
  position: absolute;
  z-index: -1;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: rgba(26, 92, 255, .1);
  filter: blur(130px);
  content: "";
  pointer-events: none;
}
.service-chapter-2::after { top: 10%; left: -260px; }
.service-chapter-4::after { right: -260px; bottom: 5%; }

.chapter-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 100%;
  background: rgba(95, 131, 185, .08);
}
.chapter-progress span {
  display: block;
  width: 100%;
  height: 0;
  background: linear-gradient(var(--service-blue), var(--service-cyan));
  box-shadow: 0 0 14px var(--service-blue);
  transition: height 1.2s cubic-bezier(.22, 1, .36, 1);
}
.service-chapter.is-active .chapter-progress span { height: 100%; }

.service-chapter-layout {
  display: grid;
  grid-template-columns: minmax(320px, .72fr) minmax(500px, 1.28fr);
  gap: 90px 7vw;
  align-items: center;
}

.service-chapter:nth-child(even) .service-chapter-copy { order: 2; }
.service-chapter:nth-child(even) .service-stage { order: 1; }
.service-chapter:nth-child(even) .service-feature-panel { order: 3; }

.service-chapter-copy {
  position: relative;
  z-index: 2;
}

.chapter-no {
  display: block;
  margin-bottom: 46px;
  color: rgba(112, 147, 202, .14);
  font-size: clamp(92px, 11vw, 170px);
  font-weight: 250;
  line-height: .66;
  letter-spacing: -.08em;
}

.service-chapter h2 {
  max-width: 580px;
  margin-top: 26px;
  color: #f2f7ff;
  font-size: clamp(42px, 4vw, 66px);
  font-weight: 480;
  line-height: 1.08;
  letter-spacing: -.05em;
}

.chapter-lead {
  max-width: 610px;
  margin-top: 30px;
  color: var(--service-copy);
  font-size: 16px;
  line-height: 1.9;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 34px;
}

.service-tags span {
  padding: 7px 12px;
  border: 1px solid rgba(132, 163, 211, .2);
  color: #8192aa;
  font-size: 11px;
  letter-spacing: .04em;
  transition: border-color .3s, color .3s, background .3s;
}
.service-tags span:hover {
  border-color: rgba(39, 213, 255, .5);
  background: rgba(39, 213, 255, .05);
  color: #d8f8ff;
}

.service-stage {
  position: relative;
  min-height: 520px;
  border: 1px solid var(--service-line);
  background:
    linear-gradient(rgba(111, 153, 218, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(111, 153, 218, .05) 1px, transparent 1px),
    rgba(8, 15, 29, .72);
  background-size: 42px 42px;
  box-shadow: 0 34px 80px rgba(0, 0, 0, .24);
  transform-style: preserve-3d;
  transition: transform .18s ease-out, border-color .4s ease;
}

.service-stage::before {
  position: absolute;
  top: -1px;
  left: 8%;
  width: 24%;
  height: 2px;
  background: var(--service-cyan);
  box-shadow: 0 0 24px var(--service-cyan);
  content: "";
}

.service-chapter.is-active .service-stage { border-color: rgba(67, 128, 234, .35); }
.service-stage > .topology-visual,
.service-stage > .browser-visual,
.service-stage > .device-visual,
.service-stage > .matrix-visual { display: none; }
.service-stage-1 > .topology-visual,
.service-stage-2 > .browser-visual,
.service-stage-3 > .device-visual,
.service-stage-4 > .matrix-visual { display: block; }

.service-feature-panel {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: .52fr 1.48fr;
  border-top: 1px solid var(--service-line);
}

.feature-panel-head {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 210px;
  padding: 30px 30px 30px 0;
  border-right: 1px solid var(--service-line);
}
.feature-panel-head span { color: #506078; font-size: 10px; letter-spacing: .16em; }
.feature-panel-head b { color: #324157; font-size: 30px; font-weight: 300; }

.service-feature-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.service-feature-list li {
  display: flex;
  gap: 18px;
  align-items: center;
  min-height: 105px;
  padding: 20px 28px;
  border-right: 1px solid var(--service-line);
  border-bottom: 1px solid var(--service-line);
  color: #aab8ca;
  font-size: 13px;
  line-height: 1.55;
  transition: color .3s, background .3s, padding .3s;
}
.service-feature-list li:nth-child(even) { border-right: 0; }
.service-feature-list li:nth-last-child(-n+2) { border-bottom: 0; }
.service-feature-list li:hover {
  padding-left: 34px;
  color: #eef6ff;
  background: rgba(40, 103, 229, .07);
}
.service-feature-list i {
  flex: 0 0 auto;
  color: var(--service-cyan);
  font-size: 10px;
  font-style: normal;
  letter-spacing: .1em;
}

/* topology */
.topology-visual {
  position: absolute;
  inset: 42px;
}
.topology-core,
.topology-node {
  position: absolute;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: 1px solid rgba(94, 143, 226, .3);
  background: rgba(10, 20, 39, .96);
  color: #b8c7da;
  box-shadow: 0 18px 40px rgba(0, 0, 0, .22);
}
.topology-core {
  top: 50%;
  left: 50%;
  width: 190px;
  height: 126px;
  padding: 24px;
  transform: translate(-50%, -50%);
}
.topology-core::before {
  position: absolute;
  inset: -8px;
  border: 1px solid rgba(57, 120, 255, .18);
  content: "";
}
.topology-core small { color: #4d6380; font-size: 8px; letter-spacing: .14em; }
.topology-core b { margin-top: 10px; color: #e5efff; font-size: 18px; font-weight: 500; }
.topology-core i {
  position: absolute;
  right: 18px;
  bottom: 16px;
  color: #45dc9b;
  font-size: 8px;
  font-style: normal;
  letter-spacing: .12em;
}
.topology-node {
  width: 112px;
  height: 68px;
  padding: 14px;
  font-size: 11px;
}
.topology-node span { color: #3f6cb4; font-size: 8px; }
.topology-node-a { top: 5%; left: 4%; }
.topology-node-b { top: 8%; right: 3%; }
.topology-node-c { bottom: 5%; left: 6%; }
.topology-node-d { right: 7%; bottom: 8%; }
.topology-line {
  position: absolute;
  z-index: 1;
  width: 33%;
  height: 1px;
  overflow: hidden;
  background: rgba(70, 124, 218, .22);
  transform-origin: left;
}
.topology-line::after {
  position: absolute;
  width: 35%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--service-cyan), transparent);
  content: "";
  animation: serviceDataFlow 2.8s linear infinite;
}
.topology-line.line-a { top: 31%; left: 20%; transform: rotate(24deg); }
.topology-line.line-b { top: 34%; right: 17%; transform: rotate(-27deg); }
.topology-line.line-c { bottom: 31%; left: 21%; transform: rotate(-24deg); }
.topology-line.line-d { right: 18%; bottom: 32%; transform: rotate(26deg); }

/* browser */
.browser-visual { position: absolute; inset: 45px 38px; perspective: 1000px; }
.browser-panel {
  position: absolute;
  overflow: hidden;
  border: 1px solid rgba(103, 148, 221, .27);
  background: #0b1426;
  box-shadow: 0 30px 60px rgba(0, 0, 0, .34);
}
.browser-panel-back {
  top: 16px;
  right: 5px;
  width: 86%;
  height: 78%;
  opacity: .48;
  transform: translateZ(-50px) rotateY(-4deg);
}
.browser-panel-main {
  bottom: 20px;
  left: 0;
  width: 90%;
  height: 82%;
  transform: rotateY(4deg);
}
.browser-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 42px;
  padding: 0 15px;
  border-bottom: 1px solid rgba(126, 161, 214, .12);
}
.browser-bar i { width: 6px; height: 6px; border-radius: 50%; background: #41516a; }
.browser-bar i:first-child { background: #3978ff; }
.browser-bar span { margin-left: 12px; color: #4f6078; font-size: 8px; letter-spacing: .08em; }
.browser-screen { display: grid; grid-template-columns: 25% 75%; height: calc(100% - 42px); }
.browser-side { border-right: 1px solid rgba(126, 161, 214, .1); background: rgba(5, 10, 20, .38); }
.browser-side::before {
  display: block;
  width: 44%;
  height: 5px;
  margin: 28px auto;
  background: var(--service-blue);
  box-shadow: 0 22px #27364c, 0 44px #27364c, 0 66px #27364c;
  content: "";
}
.browser-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  padding: 32px;
}
.browser-content b { grid-column: 1 / -1; width: 42%; height: 14px; background: #d8e8ff; }
.browser-content span { grid-column: 1 / -1; width: 80%; height: 5px; background: #30415a; }
.browser-content span + span { width: 58%; }
.browser-content em { height: 100px; margin-top: 10px; background: linear-gradient(145deg, #142544, #1a4eb1); }
.browser-content em + em { background: linear-gradient(145deg, #101c32, #193b72); }
.browser-code {
  position: absolute;
  right: 0;
  bottom: 0;
  display: grid;
  gap: 9px;
  width: 176px;
  padding: 22px;
  border: 1px solid rgba(39, 213, 255, .27);
  background: rgba(7, 16, 31, .95);
  box-shadow: 0 18px 50px rgba(0, 0, 0, .35);
}
.browser-code span { color: #637b9d; font-size: 8px; letter-spacing: .12em; }
.browser-code b { margin-top: 5px; color: #40e3b0; font-size: 9px; font-weight: 500; }

/* devices */
.device-visual { position: absolute; inset: 42px; }
.device-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 74%;
  height: 46%;
  border: 1px solid rgba(61, 128, 248, .3);
  border-radius: 50%;
  transform: translate(-50%, -50%) rotate(-12deg);
}
.device-orbit::after {
  position: absolute;
  top: 8%;
  left: 17%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--service-cyan);
  box-shadow: 0 0 20px var(--service-cyan);
  content: "";
  animation: deviceNode 4s ease-in-out infinite alternate;
}
.device {
  position: absolute;
  border: 1px solid rgba(102, 154, 241, .36);
  background: linear-gradient(145deg, #101c31, #08101e);
  box-shadow: 0 28px 60px rgba(0, 0, 0, .42);
}
.device-phone {
  top: 50%;
  left: 50%;
  z-index: 2;
  width: 170px;
  height: 330px;
  padding: 58px 20px 20px;
  border-radius: 30px;
  transform: translate(-50%, -50%) rotate(4deg);
}
.device-camera {
  position: absolute;
  top: 12px;
  left: 50%;
  width: 55px;
  height: 11px;
  border-radius: 8px;
  background: #03070d;
  transform: translateX(-50%);
}
.device-phone b { color: #ecf5ff; font-size: 15px; font-weight: 500; letter-spacing: .08em; }
.device-phone i {
  display: block;
  height: 52px;
  margin-top: 16px;
  background: linear-gradient(115deg, rgba(39, 92, 204, .7), rgba(24, 206, 236, .18));
}
.device-phone i + i { height: 34px; background: #111f36; }
.device-tablet {
  top: 50%;
  left: 7%;
  width: 230px;
  height: 160px;
  padding: 25px;
  transform: translateY(-50%) rotate(-6deg);
}
.device-tablet b { color: #aabbd2; font-size: 10px; letter-spacing: .12em; }
.device-tablet span { display: block; width: 74%; height: 7px; margin-top: 25px; background: #2c4263; }
.device-tablet span + span { width: 48%; margin-top: 12px; background: var(--service-blue); }
.device-data {
  position: absolute;
  right: 1%;
  width: 125px;
  padding: 14px 16px;
  border-left: 2px solid var(--service-cyan);
  background: rgba(10, 21, 40, .9);
  color: #7189aa;
  font-size: 8px;
  letter-spacing: .13em;
}
.device-data-a { top: 27%; }
.device-data-b { bottom: 26%; }

/* matrix */
.matrix-visual {
  position: absolute;
  inset: 40px;
  padding: 34px;
  border: 1px solid rgba(94, 142, 221, .2);
  background: rgba(6, 13, 26, .84);
}
.matrix-head,
.matrix-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #52647f;
  font-size: 8px;
  letter-spacing: .14em;
}
.matrix-head { padding-bottom: 24px; border-bottom: 1px solid rgba(111, 151, 211, .13); }
.matrix-head b { color: #43dba3; font-weight: 500; }
.matrix-row {
  display: grid;
  grid-template-columns: 110px 1fr 1fr 1fr 44px;
  gap: 8px;
  align-items: center;
  min-height: 72px;
  border-bottom: 1px solid rgba(111, 151, 211, .1);
}
.matrix-row span { color: #8294ad; font-size: 9px; letter-spacing: .1em; }
.matrix-row i { height: 3px; background: #18335f; }
.matrix-row i:nth-of-type(2) { background: #2156b7; }
.matrix-row i:nth-of-type(3) { background: var(--service-cyan); box-shadow: 0 0 12px rgba(39, 213, 255, .48); }
.matrix-row strong { color: #a8bad2; font-size: 9px; font-weight: 400; text-align: right; }
.matrix-foot { margin-top: 25px; }
.matrix-foot span { padding: 7px 12px; border: 1px solid rgba(111, 151, 211, .16); }

/* CTA */
.service-cta {
  padding: 140px 0;
  background: #080e1a;
}
.service-cta-inner {
  position: relative;
  display: grid;
  grid-template-columns: .42fr 1.25fr .45fr;
  gap: 5vw;
  align-items: end;
  min-height: 400px;
  padding: 68px;
  overflow: hidden;
  border: 1px solid rgba(115, 155, 215, .18);
  background:
    linear-gradient(110deg, rgba(5, 12, 25, .98), rgba(9, 25, 51, .86)),
    url("../images/banner-service.jpg") center / cover no-repeat;
}
.service-cta-inner::before {
  position: absolute;
  top: -180px;
  right: -80px;
  width: 480px;
  height: 480px;
  border: 1px solid rgba(68, 129, 234, .18);
  border-radius: 50%;
  content: "";
  box-shadow: 0 0 0 80px rgba(68, 129, 234, .035), 0 0 0 160px rgba(68, 129, 234, .025);
}
.service-cta-mark {
  position: relative;
  display: flex;
  gap: 4px;
  align-items: flex-end;
  color: rgba(102, 143, 205, .24);
  font-size: 84px;
  font-weight: 200;
  line-height: .8;
  letter-spacing: -.12em;
}
.service-cta-mark span:nth-child(2) { transform: translateY(-25px); }
.service-cta-copy { position: relative; z-index: 1; }
.service-cta h2 {
  margin-top: 28px;
  color: #f3f7ff;
  font-size: clamp(38px, 4vw, 62px);
  font-weight: 440;
  line-height: 1.16;
  letter-spacing: -.045em;
}
.service-cta-copy p { margin-top: 28px; color: #8191a7; font-size: 14px; }
.service-cta-copy p a { margin: 0 4px; color: #c9d8ec; border-bottom: 1px solid #526783; }
.service-cta-action {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}
.service-cta-action a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-width: 180px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(153, 181, 224, .4);
  color: #f1f6ff;
  font-size: 15px;
}
.service-cta-action a span { color: var(--service-cyan); }
.service-cta-action a:hover { padding-left: 10px; border-color: var(--service-cyan); }
.service-cta-action small { color: #52637b; font-size: 10px; letter-spacing: .08em; }
.service-cta-line {
  position: absolute;
  right: 68px;
  bottom: 30px;
  left: 68px;
  height: 1px;
  background: linear-gradient(90deg, var(--service-blue), rgba(57, 120, 255, .08));
  transform-origin: left;
}

/* chapter reveal */
.service-chapter-copy,
.service-stage,
.service-feature-panel {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity .8s ease, transform .9s cubic-bezier(.22, 1, .36, 1);
}
.service-stage { transition-delay: .12s; }
.service-feature-panel { transition-delay: .22s; }
.service-chapter.is-active .service-chapter-copy,
.service-chapter.is-active .service-stage,
.service-chapter.is-active .service-feature-panel {
  opacity: 1;
  transform: translateY(0);
}

@keyframes serviceSpin { to { transform: rotate(360deg); } }
@keyframes servicePulseLine { 0%, 100% { transform: scaleX(.25); opacity: .4; } 50% { transform: scaleX(1); opacity: 1; } }
@keyframes serviceDataFlow { from { transform: translateX(-110%); } to { transform: translateX(320%); } }
@keyframes deviceNode { from { transform: translate(0, 0); } to { transform: translate(260px, 145px); } }

@media (max-width: 1180px) {
  .service-hero-inner { grid-template-columns: 1fr .7fr; }
  .service-chapter { min-height: auto; }
  .service-chapter-layout { grid-template-columns: 1fr; gap: 64px; }
  .service-chapter:nth-child(even) .service-chapter-copy,
  .service-chapter:nth-child(even) .service-stage { order: initial; }
  .service-chapter-copy { display: grid; grid-template-columns: 170px 1fr; column-gap: 40px; }
  .service-chapter-copy .chapter-no { grid-row: 1 / 5; }
  .service-stage { min-height: 500px; }
  .service-feature-panel { grid-column: auto; }
  .service-cta-inner { grid-template-columns: .3fr 1fr; }
  .service-cta-action { grid-column: 2; }
}

@media (max-width: 820px) {
  .service-page .wrapper-wide { width: calc(100% - 36px); }
  .service-hero,
  .service-hero-inner { min-height: 700px; }
  .service-hero-inner { display: block; padding: 120px 0 86px; }
  .service-hero h1 { font-size: clamp(60px, 18vw, 92px); }
  .service-radar { position: absolute; right: -100px; bottom: 50px; width: 390px; opacity: .38; }
  .service-hero-copy { position: relative; z-index: 2; }
  .service-scroll-hint { display: none; }
  .service-intro { padding: 84px 0 78px; }
  .service-intro-grid { grid-template-columns: 1fr; gap: 34px; }
  .service-intro-label span,
  .service-intro-label b { text-align: left; margin-left: 0; max-width: none; }
  .service-intro-main { order: 0; }
  .service-manifesto { font-size: clamp(32px, 8vw, 48px); }
  .service-index { grid-template-columns: 1fr 1fr; margin-top: 16px; }
  .service-index a:nth-child(2) { border-right: 0; }
  .service-index a:nth-child(-n+2) { border-bottom: 1px solid var(--service-line); }
  .service-chapter { padding: 94px 0; }
  .service-chapter::before { background-size: 100% 100%, 100% 72px; }
  .service-chapter-layout { gap: 50px; }
  .service-chapter-copy { display: block; }
  .chapter-no { margin-bottom: 38px; font-size: 100px; }
  .service-stage { min-height: 430px; }
  .service-feature-panel { grid-template-columns: 1fr; }
  .feature-panel-head {
    min-height: 90px;
    flex-direction: row;
    align-items: center;
    padding: 20px 0;
    border-right: 0;
    border-bottom: 1px solid var(--service-line);
  }
  .service-feature-list { grid-template-columns: 1fr; }
  .service-feature-list li:nth-child(n) { border-right: 0; border-bottom: 1px solid var(--service-line); }
  .service-feature-list li:last-child { border-bottom: 0; }
  .service-cta { padding: 90px 0; }
  .service-cta-inner { grid-template-columns: 1fr; gap: 44px; padding: 42px 32px 62px; }
  .service-cta-mark { display: none; }
  .service-cta-action { grid-column: auto; width: min(100%, 260px); }
}

@media (max-width: 560px) {
  .service-hero,
  .service-hero-inner { min-height: 620px; }
  .service-hero-inner { padding-top: 96px; }
  .service-hero-copy > p { max-width: 300px; font-size: 16px; }
  .service-hero-actions { align-items: flex-start; flex-direction: column; gap: 20px; margin-top: 38px; }
  .service-primary-link { min-width: 166px; height: 48px; }
  .service-radar { right: -150px; bottom: 20px; width: 360px; }
  .service-hero-foot { bottom: 24px; }
  .service-intro-label b { margin-top: 13px; }
  .service-index a { min-height: 62px; padding: 0 12px; font-size: 12px; }
  .service-index a span { margin-right: 10px; }
  .service-chapter h2 { font-size: 38px; }
  .chapter-lead { font-size: 14px; line-height: 1.8; }
  .service-stage { min-height: 340px; }
  .topology-visual { inset: 24px 14px; transform: scale(.84); }
  .topology-node { width: 90px; padding: 10px; }
  .browser-visual { inset: 28px 18px; }
  .browser-panel-main { width: 96%; }
  .browser-code { right: -5px; width: 132px; padding: 16px; }
  .browser-content { padding: 20px; }
  .browser-content em { height: 74px; }
  .device-visual { inset: 20px 10px; transform: scale(.84); }
  .device-tablet { left: -12%; }
  .device-data { right: -7%; }
  .matrix-visual { inset: 18px 12px; padding: 22px 16px; }
  .matrix-row { grid-template-columns: 82px 1fr 1fr 1fr 34px; }
  .matrix-foot span { padding: 6px; font-size: 7px; }
  .service-cta-inner { min-height: 0; padding: 36px 24px 54px; }
  .service-cta h2 { font-size: 36px; }
  .service-cta-line { right: 24px; left: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  .service-page *,
  .service-page *::before,
  .service-page *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
  .service-chapter-copy,
  .service-stage,
  .service-feature-panel {
    opacity: 1;
    transform: none;
  }
}

/* ============================================================
   VI alignment · 深色 Banner + 明亮内容区 + 金品云品牌蓝
   ============================================================ */
.service-page {
  --service-line-light: #dce5f0;
  --service-text-dark: #14213a;
  --service-muted-light: #5f6f87;
  background: #fff;
}

.service-page .page-main {
  background: #fff;
  color: var(--service-text-dark);
}

.service-kicker {
  color: #155eef;
}

.service-hero {
  min-height: clamp(500px, 56vh, 640px);
  background:
    linear-gradient(90deg, rgba(7, 16, 31, .96) 0%, rgba(7, 16, 31, .76) 50%, rgba(7, 16, 31, .46) 100%),
    url("../images/banner-service.jpg") center / cover no-repeat;
}

.service-hero::after {
  height: 90px;
  background: linear-gradient(180deg, transparent, rgba(7, 16, 31, .28));
}

.service-hero-inner {
  min-height: clamp(500px, 56vh, 640px);
  padding-top: 70px;
}

.service-hero h1 {
  margin-top: 24px;
  font-size: clamp(54px, 6.2vw, 86px);
  font-weight: 540;
  letter-spacing: -.055em;
}

.service-hero-copy > p {
  margin-top: 24px;
  font-size: clamp(17px, 1.4vw, 20px);
}

.service-hero-actions {
  margin-top: 38px;
}

.service-primary-link {
  background: #155eef;
}

.service-radar {
  width: min(32vw, 400px);
}

.service-hero-foot {
  bottom: 30px;
}

.service-intro {
  padding: 96px 0 88px;
  background: #fff;
  border-bottom-color: var(--service-line-light);
}

.service-intro-label b {
  color: #708097;
  max-width: 280px;
  margin-left: auto;
  font-size: 15px;
  line-height: 1.75;
  text-align: right;
}

.service-intro-label span {
  color: #155eef;
  text-align: right;
}

.service-intro-main {
  display: grid;
  gap: 22px;
  align-content: end;
  order: -1;
}

.service-manifesto {
  color: #15233d;
  font-size: clamp(34px, 3.6vw, 56px);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -.035em;
  max-width: none;
}

.service-intro-lead {
  margin: 0;
  max-width: none;
  color: #566681;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0;
}

.service-index {
  border-color: var(--service-line-light);
  margin-top: 48px;
  background: #f8fafc;
}

.service-index a {
  border-color: var(--service-line-light);
  color: #475569;
  font-size: 14px;
  font-weight: 600;
  min-height: 84px;
  padding: 0 24px;
  transition: color .25s, background .25s;
}

.service-index a span {
  color: #94a3b8;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  margin-right: 14px;
}

.service-index a:hover,
.service-index a.is-active {
  color: #155eef;
  background: #edf4ff;
}

.service-index a::after {
  background: #155eef;
  height: 3px;
}

.service-chapter,
.service-chapter:nth-child(even) {
  min-height: auto;
  padding: 112px 0;
  border-bottom-color: var(--service-line-light);
  background: #fff;
}

.service-chapter:nth-child(even) {
  background: #f5f8fc;
}

.service-chapter::before {
  opacity: .7;
  background:
    linear-gradient(90deg, transparent 49.9%, rgba(116, 144, 184, .07) 50%, transparent 50.1%),
    linear-gradient(rgba(116, 144, 184, .055) 1px, transparent 1px);
  background-size: 100% 100%, 100% 96px;
}

.service-chapter-2::after,
.service-chapter-4::after {
  opacity: .5;
  background: rgba(70, 128, 240, .09);
}

.chapter-progress {
  background: #e9eff7;
}

.chapter-progress span {
  background: linear-gradient(#155eef, #42b9f5);
  box-shadow: 0 0 12px rgba(21, 94, 239, .25);
}

.chapter-no {
  color: #e5ebf3;
}

.service-chapter .service-kicker {
  color: #155eef;
}

.service-chapter h2 {
  color: #15233d;
}

.chapter-lead {
  color: #566681;
}

.service-tags span {
  border-color: #dbe4ef;
  background: #fff;
  color: #64748b;
}

.service-chapter:nth-child(even) .service-tags span {
  background: #f9fbfd;
}

.service-tags span:hover {
  border-color: rgba(21, 94, 239, .42);
  background: #edf4ff;
  color: #155eef;
}

.service-stage {
  border-color: #d6e0ed;
  background:
    linear-gradient(rgba(111, 153, 218, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(111, 153, 218, .06) 1px, transparent 1px),
    #0b1a34;
  background-size: 42px 42px;
  box-shadow: 0 24px 65px rgba(29, 67, 122, .14);
}

.service-chapter.is-active .service-stage {
  border-color: rgba(21, 94, 239, .4);
}

.service-feature-panel {
  border-color: var(--service-line-light);
}

.feature-panel-head {
  border-color: var(--service-line-light);
}

.feature-panel-head span {
  color: #8090a6;
}

.feature-panel-head b {
  color: #b2bfd0;
}

.service-feature-list li {
  border-color: var(--service-line-light);
  background: rgba(255, 255, 255, .68);
  color: #465873;
}

.service-feature-list li:hover {
  color: #155eef;
  background: #edf4ff;
}

.service-feature-list i {
  color: #155eef;
}

.service-cta {
  padding: 110px 0;
  background: #f5f8fc;
}

.service-cta-inner {
  box-shadow: 0 30px 80px rgba(20, 45, 84, .14);
}

@media (max-width: 820px) {
  .service-hero,
  .service-hero-inner {
    min-height: 570px;
  }

  .service-hero-inner {
    padding: 92px 0 72px;
  }

  .service-hero h1 {
    font-size: clamp(52px, 15vw, 72px);
  }

  .service-radar {
    width: 340px;
  }

  .service-intro {
    padding: 74px 0 68px;
  }

  .service-index a:nth-child(-n+2) {
    border-bottom-color: var(--service-line-light);
  }

  .service-chapter,
  .service-chapter:nth-child(even) {
    padding: 82px 0;
  }
}

@media (max-width: 560px) {
  .service-hero,
  .service-hero-inner {
    min-height: 550px;
  }

  .service-hero-inner {
    padding-top: 76px;
  }

  .service-hero-actions {
    margin-top: 32px;
  }

  .service-radar {
    right: -165px;
    bottom: 0;
    width: 330px;
  }

  .service-hero-foot {
    bottom: 20px;
  }

  .service-manifesto {
    font-size: 38px;
  }
}