:root {
  --bg: #f4f4f5;
  --surface: #fff;
  --ink: #18181b;
  --muted: #71717a;
  --line: #e4e4e7;
  --lime: #d9f99d;
  --lime-deep: #365314;
  --shadow: 0 24px 80px rgba(24, 24, 27, 0.08);
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  letter-spacing: 0;
}

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

img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  min-height: 64px;
  padding: 0 max(16px, calc((100vw - 1220px) / 2));
  background: rgba(244, 244, 245, 0.86);
  backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid rgba(228, 228, 231, 0.72);
}

.brand,
.topbar nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand {
  font-weight: 850;
}

.brand span {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: #fff;
}

.topbar nav {
  color: var(--muted);
  font-size: 14px;
  font-weight: 750;
}

.topbar nav a {
  min-height: 36px;
  padding: 0 12px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
}

.topbar nav .start-link {
  background: var(--ink);
  color: #fff;
}

.examples-hero {
  width: min(1440px, calc(100% - 32px));
  min-height: min(680px, calc(100vh - 92px));
  margin: 18px auto 52px;
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  color: var(--ink);
  box-shadow: var(--shadow);
  border: 1px solid rgba(24, 24, 27, 0.08);
}

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

h1 {
  margin-bottom: 16px;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.05;
}

.sketch-flow {
  width: 100%;
  height: auto;
  min-height: 620px;
  display: block;
}

.paper-bg {
  fill: #fff;
}

.sketch-cloud,
.platform-loop {
  fill: none;
  stroke: rgba(24, 24, 27, 0.12);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.cloud-a,
.cloud-b {
  stroke-dasharray: 8 12;
}

.sketch-kicker {
  fill: var(--lime-deep);
  font-size: 22px;
  font-weight: 900;
}

.sketch-title {
  fill: var(--ink);
  font-size: 60px;
  font-weight: 950;
  letter-spacing: 0;
}

.sketch-subtitle {
  fill: var(--muted);
  font-size: 20px;
  font-weight: 700;
}

.node-card,
.output-card {
  fill: #fff;
  stroke: var(--ink);
  stroke-width: 3.2;
  filter: url(#paper-shadow);
}

.lime-card {
  fill: var(--lime);
}

.photo-icon,
.flow-arrow,
.mini-line,
.spark,
.doodle,
.ai-orbit {
  fill: none;
  stroke: var(--ink);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.flow-arrow {
  marker-end: url(#arrow);
  stroke-width: 3.4;
}

.arrow-a,
.arrow-b,
.arrow-c,
.doodle {
  stroke-dasharray: 1 9;
}

.photo-sun,
.lime-dot {
  fill: var(--lime);
  stroke: var(--ink);
  stroke-width: 3;
}

.dot {
  fill: #fff;
  stroke: var(--ink);
  stroke-width: 3;
}

.node-title,
.platform-title,
.output-title {
  fill: var(--ink);
  font-size: 25px;
  font-weight: 950;
}

.node-note,
.output-note {
  fill: var(--muted);
  font-size: 18px;
  font-weight: 760;
}

.center {
  text-anchor: middle;
}

.platform-chip rect {
  fill: var(--lime);
  stroke: var(--ink);
  stroke-width: 2.5;
}

.platform-chip text {
  fill: var(--lime-deep);
  text-anchor: middle;
  font-size: 18px;
  font-weight: 900;
}

.dark-chip rect {
  fill: var(--ink);
}

.dark-chip text {
  fill: #fff;
}

.logo-mark {
  fill: var(--ink);
}

.logo-text {
  fill: #fff;
  font-size: 30px;
  font-weight: 950;
  text-anchor: middle;
}

.doodle {
  stroke: var(--lime-deep);
  stroke-width: 3.2;
}

.case-scene {
  width: min(1220px, calc(100% - 32px));
  min-height: 760px;
  margin: 0 auto 42px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  gap: 30px;
}

.case-copy {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 14px;
  align-content: start;
}

.case-copy > span,
.platform-pill {
  width: max-content;
  max-width: 100%;
  padding: 7px 11px;
  border-radius: 999px;
  background: var(--lime);
  color: var(--lime-deep);
  font-size: 13px;
  font-weight: 850;
}

.platform-lockup {
  width: max-content;
  max-width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.platform-icons {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.platform-icon {
  position: relative;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(24, 24, 27, 0.1);
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: #fff;
  box-shadow: 0 10px 24px rgba(24, 24, 27, 0.12);
  font-size: 15px;
  font-weight: 950;
  line-height: 1;
}

.platform-icon.taobao {
  background: var(--lime);
  color: var(--lime-deep);
}

.platform-icon.tmall {
  overflow: visible;
}

.platform-icon.tmall::before,
.platform-icon.tmall::after {
  content: "";
  position: absolute;
  top: -5px;
  width: 13px;
  height: 13px;
  border-radius: 4px 4px 2px 2px;
  background: var(--ink);
  transform: rotate(45deg);
}

.platform-icon.tmall::before {
  left: 5px;
}

.platform-icon.tmall::after {
  right: 5px;
}

.case-copy h2 {
  margin-bottom: 0;
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1.06;
}

.case-copy p {
  max-width: 260px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.product-page {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(420px, 1.18fr) minmax(300px, 0.82fr);
  gap: 18px;
  align-items: stretch;
}

.detail-stream,
.gallery-side {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 14px 42px rgba(24, 24, 27, 0.05);
  overflow: hidden;
}

.detail-stream {
  max-height: 700px;
  overflow-y: auto;
  scroll-snap-type: y proximity;
  scrollbar-width: none;
  -ms-overflow-style: none;
  cursor: ns-resize;
  scroll-behavior: auto;
}

.detail-stream::-webkit-scrollbar,
.main-strip::-webkit-scrollbar,
.sku-strip::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

.gallery-side {
  padding: 16px;
  display: grid;
  grid-template-rows: minmax(390px, 1fr) auto;
  gap: 16px;
}

.main-gallery,
.sku-gallery {
  min-width: 0;
}

.gallery-title {
  min-height: 34px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.gallery-title strong {
  font-size: 18px;
}

.gallery-title em {
  padding: 5px 9px;
  border-radius: 999px;
  background: #f4f4f5;
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
  font-weight: 850;
}

.detail-panel,
.main-strip figure,
.sku-strip figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: #f1f1f2;
}

.detail-panel {
  height: 700px;
  scroll-snap-align: start;
}

.detail-panel:not(:last-child) {
  border-bottom: 10px solid #fff;
}

.main-strip,
.sku-strip {
  display: grid;
  grid-auto-flow: column;
  gap: 12px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  scrollbar-width: none;
  -ms-overflow-style: none;
  cursor: ew-resize;
  scroll-behavior: auto;
}

.detail-stream:hover,
.sku-gallery:hover .sku-strip {
  box-shadow: inset 0 0 0 1px rgba(217, 249, 157, 0.95);
}

.main-strip figure {
  width: 324px;
  height: 390px;
  border-radius: 18px;
  scroll-snap-align: start;
}

.sku-strip figure {
  width: 156px;
  height: 156px;
  border-radius: 16px;
  scroll-snap-align: start;
}

figcaption {
  position: absolute;
  left: 18px;
  bottom: 18px;
  z-index: 2;
  max-width: calc(100% - 36px);
  padding: 9px 12px 9px 30px;
  border-radius: 999px;
  background: rgba(24, 24, 27, 0.72);
  color: #fff;
  backdrop-filter: blur(10px);
  font-size: 13px;
  font-weight: 850;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 180ms ease, transform 180ms ease;
}

figure::before {
  content: "";
  position: absolute;
  left: 28px;
  bottom: 29px;
  z-index: 3;
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.92);
  opacity: 0;
  transform: scale(0.72);
  transition: opacity 180ms ease, transform 180ms ease;
}

figure::after {
  content: attr(data-note);
  position: absolute;
  left: 18px;
  right: 18px;
  top: 18px;
  z-index: 2;
  padding: 11px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
  box-shadow: 0 14px 34px rgba(24, 24, 27, 0.14);
  font-size: 13px;
  font-weight: 850;
  line-height: 1.45;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 180ms ease, transform 180ms ease;
  pointer-events: none;
}

figure:hover figcaption,
figure:hover::before,
figure:hover::after {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.final-cta {
  margin-top: 54px;
  padding: 86px 16px;
  background: var(--ink);
  color: #fff;
  text-align: center;
}

.final-cta h2 {
  max-width: 760px;
  margin: 0 auto 24px;
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.12;
}

.final-cta a {
  min-height: 48px;
  padding: 0 22px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  background: #fff;
  color: var(--ink);
  font-weight: 850;
}

@media (max-width: 1060px) {
  .case-scene,
  .product-page {
    grid-template-columns: 1fr;
  }

  .case-copy {
    position: static;
  }

  .case-copy p {
    max-width: 620px;
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .examples-hero {
    width: min(100% - 24px, 1440px);
    min-height: 560px;
    margin: 12px auto 34px;
    overflow-x: auto;
  }

  h1 {
    font-size: 38px;
  }

  .sketch-flow {
    min-width: 860px;
    min-height: 560px;
  }

  .case-scene {
    width: min(100% - 24px, 1220px);
    min-height: auto;
    padding: 18px;
    border-radius: 18px;
  }

  .detail-stream {
    max-height: 560px;
  }

  .detail-panel {
    height: 560px;
  }

  .gallery-side {
    padding: 12px;
    grid-template-rows: auto auto;
  }

  .main-strip figure {
    width: 250px;
    height: 330px;
  }

  .sku-strip figure {
    width: 132px;
    height: 132px;
  }
}

/* =====================================================================
   2026-06-13 视觉升级：真实照片 · 悬停放大 · 滚动进场 · 流程图动效
   ===================================================================== */

/* 照片填充与悬停放大 */
.detail-panel img,
.main-strip figure img,
.sku-strip figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 720ms cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}

.detail-panel:hover img,
.main-strip figure:hover img,
.sku-strip figure:hover img {
  transform: scale(1.06);
}

/* 角标可读性渐变 */
.detail-panel::after,
.main-strip figure::after,
.sku-strip figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0) 58%, rgba(15, 23, 42, 0.28) 100%);
}

/* 滚动进场（JS 控制，reduce-motion 不添加 .reveal） */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 760ms cubic-bezier(0.22, 1, 0.36, 1), transform 760ms cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.reveal.in-view {
  opacity: 1;
  transform: none;
}

/* 流程图：箭头虚线流动 + 火花呼吸 */
.sketch-flow .flow-arrow {
  animation: dashFlow 1s linear infinite;
}

.sketch-flow .spark {
  transform-box: fill-box;
  transform-origin: center;
  animation: sparkBeat 2.2s ease-in-out infinite;
}

.sketch-flow .ai-orbit {
  transform-box: fill-box;
  transform-origin: center;
  animation: orbitBreath 3.2s ease-in-out infinite;
}

@keyframes dashFlow {
  to { stroke-dashoffset: -20; }
}

@keyframes sparkBeat {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.14); }
}

@keyframes orbitBreath {
  0%, 100% { opacity: 0.85; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.04); }
}

@media (prefers-reduced-motion: reduce) {
  .detail-panel img,
  .main-strip figure img,
  .sku-strip figure img {
    transition: none;
  }

  .sketch-flow .flow-arrow,
  .sketch-flow .spark,
  .sketch-flow .ai-orbit {
    animation: none;
  }
}