:root {
  --c: 1120px;
  --h: 64px;
  --green: #2daf66;
  --green-dark: #1f8a4e;
  --green-bg: rgba(45, 175, 102, 0.08);
  --ink: #1a2a1f;
  --muted: #657a6c;
  --line: #e4ece6;
  --paper: #fff;
  --bg: #f5f8f6;
  --s: 0 4px 16px rgba(0,0,0,0.05);
  --m: 0 8px 28px rgba(28,57,41,0.08);
  --l: 0 20px 48px rgba(28,57,41,0.10);
  --r: 14px;
  --rr: 999px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--h); }

body {
  margin: 0;
  font-family: "Source Han Sans SC","PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",sans-serif;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.page-shell {
  min-height: 100vh;
  overflow-x: hidden;
}

.container {
  width: min(var(--c), calc(100% - 40px));
  max-width: 100%;
  margin: 0 auto;
}

.main-content {
  padding-top: calc(var(--h) + 16px);
}

/* ═══ HEADER ═══ */
.site-header {
  position: fixed;
  top: 0; left: 0; width: 100%;
  z-index: 40;
  background: rgba(248, 251, 249, 0.92);
  border-bottom: 1px solid rgba(218, 231, 222, 0.88);
  backdrop-filter: blur(14px);
  box-shadow: 0 6px 22px rgba(28, 57, 41, 0.04);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--h);
  padding: 0 2px;
}

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

.brand__logo {
  width: 38px;
  height: 38px;
}

.brand__text strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand__text span {
  display: block;
  font-size: 11px;
  color: var(--muted);
  margin-top: 2px;
  line-height: 1.35;
}

.site-nav {
  display: flex;
  gap: 2px;
}

.site-nav a {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  transition: background 0.2s;
}

.site-nav a:hover {
  background: var(--green-bg);
  color: var(--green-dark);
}

/* ═══ HERO ═══ */
.hero {
  padding: 56px 0 0;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  right: -160px;
  top: -100px;
  width: 600px;
  height: 600px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(45, 175, 102, 0.06), transparent 65%);
}

.hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(380px, 420px);
  gap: 48px;
  align-items: start;
  min-width: 0;
}

.hero__copy {
  max-width: 640px;
  min-width: 0;
}

.hero__label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--green);
  text-transform: uppercase;
  margin: 0 0 14px;
}

.hero h1 {
  font-size: clamp(34px, 4.4vw, 60px);
  font-weight: 800;
  line-height: 1.04;
  margin: 0;
  letter-spacing: -0.03em;
}

.hero h1 span {
  color: var(--green-dark);
  display: block;
  margin-top: 6px;
}

.hero__desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--muted);
  margin: 20px 0 0;
}

.hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.hero__tags li {
  padding: 6px 16px;
  border-radius: var(--rr);
  background: var(--green-bg);
  font-size: 13px;
  font-weight: 600;
  color: var(--green-dark);
}

.hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.hero__facts article {
  padding: 14px 14px 12px;
  border-top: 2px solid rgba(45, 175, 102, 0.18);
  background: rgba(255, 255, 255, 0.52);
}

.hero__facts strong {
  display: block;
  font-size: 14px;
  line-height: 1.35;
}

.hero__facts p {
  margin: 6px 0 0;
  font-size: 12px;
  line-height: 1.65;
  color: var(--muted);
}

.qr-card--hero {
  max-width: 360px;
  margin-top: 26px;
}

/* ═══ PREVIEW + QR ═══ */
.hero__visual {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  width: min(430px, 100%);
  min-width: 0;
}

.preview-panel {
  width: 100%;
  padding: 8px 0 0;
  border-radius: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
  overflow: hidden;
}

.preview-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  padding: 0 4px;
}

.preview-panel__head strong {
  font-size: 17px;
  line-height: 1.25;
  font-weight: 700;
}

.preview-panel__head span {
  font-size: 12px;
  color: var(--muted);
  text-align: right;
  line-height: 1.5;
}

.preview-carousel {
  width: 100%;
  overflow: hidden;
  border-radius: 20px;
  background: linear-gradient(180deg, #f8fbf9 0%, #edf5ef 100%);
  box-shadow: 0 18px 42px rgba(24, 62, 41, 0.10);
}

.preview-carousel__track {
  display: flex;
  width: 300%;
  animation: previewSlide 12s infinite;
}

.preview-slide {
  width: 33.3333%;
  flex: 0 0 33.3333%;
  margin: 0;
  padding: 16px 16px 14px;
}

.preview-slide__media {
  position: relative;
  border-radius: 14px;
  background: #ffffff;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(20, 60, 37, 0.06);
}

.preview-slide__media::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 56px;
  background: linear-gradient(180deg, rgba(248, 251, 249, 0.98), rgba(248, 251, 249, 0.1));
  pointer-events: none;
}

.preview-slide img {
  width: 100%;
  height: 404px;
  object-fit: cover;
  object-position: center top;
  transform: scale(1.02);
}

.preview-slide figcaption {
  margin-top: 10px;
  padding: 0 2px;
  font-size: 12px;
  font-weight: 600;
  color: #516558;
  text-align: left;
  line-height: 1.6;
}

.preview-dots {
  display: flex;
  justify-content: center;
  gap: 7px;
  margin-top: 12px;
}

.preview-dots span {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: rgba(45, 175, 102, 0.18);
}

.preview-dots span:first-child {
  background: var(--green);
  width: 16px;
  border-radius: 999px;
}

.qr-card {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 16px 18px;
  border-radius: var(--r);
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--m);
}

.qr-card img {
  width: 112px;
  height: 112px;
  flex: 0 0 auto;
  border-radius: 10px;
  display: block;
  object-fit: cover;
}

.qr-card__label {
  margin-top: 0;
  text-align: left;
}

.qr-card__label strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
}

.qr-card__label span {
  display: block;
  font-size: 12px;
  line-height: 1.55;
  color: var(--muted);
  margin-top: 4px;
}

@keyframes previewSlide {
  0%, 28% { transform: translateX(0); }
  34%, 62% { transform: translateX(-33.3333%); }
  68%, 96% { transform: translateX(-66.6666%); }
  100% { transform: translateX(0); }
}

/* ═══ FEATURES ═══ */
.feature-overview {
  margin-top: 48px;
}

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

.feature-card {
  padding: 24px 22px;
  border-radius: 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--s);
}

.feature-card__index {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: var(--green);
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 18px;
  line-height: 1.35;
  margin: 0 0 10px;
}

.feature-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

.feature-card--planned {
  background: linear-gradient(180deg, #f7fbf8 0%, #eef7f1 100%);
}

/* ═══ SECTIONS ═══ */
.section {
  margin-top: 56px;
}

.eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--green);
  text-transform: uppercase;
  margin: 0 0 10px;
}

.section-head {
  margin-bottom: 22px;
}

.section-head h2 {
  font-size: clamp(22px, 2.8vw, 36px);
  font-weight: 800;
  line-height: 1.15;
  margin: 0;
  letter-spacing: -0.02em;
}

/* ═══ CO-GROWTH ═══ */
.co-growth {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 36px;
  border-radius: var(--r);
  background: linear-gradient(135deg, #1f8a4e, #2daf66);
  color: #fff;
}

.co-growth__copy h2 {
  font-size: clamp(20px, 2.6vw, 34px);
  font-weight: 800;
  line-height: 1.15;
  margin: 0;
}

.co-growth__copy .eyebrow {
  color: rgba(255, 255, 255, 0.8);
}

.co-growth__copy p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.7;
  opacity: 0.92;
}

.co-growth__list {
  display: grid;
  gap: 12px;
}

.co-growth__list article {
  padding: 18px 20px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(6px);
}

.co-growth__list strong {
  display: block;
  font-size: 17px;
  margin-bottom: 4px;
}

.co-growth__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  opacity: 0.85;
}

/* ═══ SCENES ═══ */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.scene-card {
  padding: 24px;
  border-radius: var(--r);
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--s);
}

.scene-card__tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--rr);
  background: var(--green-bg);
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 14px;
}

.scene-card h3 {
  font-size: 18px;
  margin: 0 0 8px;
}

.scene-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
  margin: 0;
}

/* ═══ FOOTER ═══ */
.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--line);
  margin-top: 56px;
}

.site-footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.site-footer strong {
  font-size: 15px;
  display: block;
  margin-bottom: 4px;
}

.site-footer p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

.site-footer__meta {
  font-size: 12px;
  color: var(--muted);
}

.site-footer__record {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.site-footer__record a {
  font-size: 12px;
  color: var(--muted);
  transition: color 0.2s ease;
}

.site-footer__record a:hover {
  color: var(--green-dark);
}

/* ═══════════════════════════════════
   TABLET
   ═══════════════════════════════════ */
@media (max-width: 860px) {
  :root { --h: 56px; }

  .hero__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero__copy {
    max-width: none;
  }

  .hero__visual {
    justify-content: center;
    width: 100%;
    max-width: 460px;
    margin: 0 auto;
  }

  .qr-card--hero {
    max-width: 100%;
  }

  .hero__facts {
    grid-template-columns: 1fr;
  }

  .co-growth {
    grid-template-columns: 1fr;
  }

  .scene-grid {
    grid-template-columns: 1fr;
  }

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

  .co-growth {
    padding: 26px;
  }
}

/* ═══════════════════════════════════
   MOBILE
   ═══════════════════════════════════ */
@media (max-width: 480px) {
  :root {
    --h: 50px;
    --c: calc(100% - 24px);
  }

  body {
    background:
      radial-gradient(circle at top right, rgba(45, 175, 102, 0.10), transparent 34%),
      linear-gradient(180deg, #f7fbf8 0%, #f3f7f4 180px, #f5f8f6 181px);
  }

  .main-content {
    padding-top: calc(var(--h) + 8px);
  }

  .container {
    width: calc(100% - 24px);
  }

  .site-header__inner {
    min-height: var(--h);
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 0;
    padding: 10px 0 9px;
  }

  .brand {
    width: 100%;
    min-width: 0;
    gap: 10px;
  }

  .brand__logo {
    width: 34px;
    height: 34px;
    flex: 0 0 auto;
  }

  .brand__text strong {
    font-size: 15px;
    line-height: 1.2;
  }

  .brand__text span {
    font-size: 10px;
    white-space: normal;
    max-width: 190px;
    margin-top: 3px;
    line-height: 1.35;
  }

  .site-header__right {
    display: none;
  }

  .site-nav {
    display: none;
  }

  .site-nav a {
    display: none;
  }

  .hero {
    padding: 10px 0 0;
  }

  .hero h1 {
    font-size: 26px;
    line-height: 1.12;
    letter-spacing: -0.04em;
  }

  .hero__desc {
    font-size: 14px;
    line-height: 1.78;
    margin-top: 14px;
    max-width: 100%;
  }

  .hero__tags {
    gap: 8px;
    margin-top: 16px;
  }

  .hero__tags li {
    padding: 6px 11px;
    font-size: 11px;
    background: rgba(255, 255, 255, 0.84);
    box-shadow: 0 4px 10px rgba(31, 138, 78, 0.06);
  }

  .hero__label {
    margin-bottom: 12px;
    font-size: 11px;
  }

  .hero__facts {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 20px;
  }

  .hero__facts article {
    min-height: 108px;
    padding: 14px 12px 12px;
    border-top-width: 0;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.82);
    box-shadow: 0 10px 24px rgba(30, 72, 47, 0.06);
  }

  .hero__facts article:last-child {
    grid-column: 1 / -1;
    min-height: auto;
  }

  .hero__facts strong {
    font-size: 13px;
  }

  .hero__facts p {
    font-size: 11px;
  }

  .hero__visual {
    margin-top: 6px;
  }

  .preview-panel {
    padding: 0;
  }

  .preview-panel__head {
    display: block;
    margin-bottom: 10px;
    padding: 0 2px;
  }

  .preview-panel__head strong {
    font-size: 16px;
  }

  .preview-panel__head span {
    display: block;
    margin-top: 5px;
    max-width: none;
    text-align: left;
    font-size: 11px;
  }

  .preview-slide {
    padding: 14px 14px 10px;
  }

  .preview-slide img {
    height: min(420px, 96vw);
  }

  .preview-slide__media {
    border-radius: 16px;
  }

  .preview-slide figcaption {
    font-size: 11px;
    line-height: 1.55;
    min-height: 34px;
  }

  .qr-card {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    max-width: none;
    padding: 14px;
    border-radius: 16px;
    box-shadow: 0 14px 30px rgba(29, 67, 44, 0.08);
  }

  .qr-card img {
    width: 96px;
    height: 96px;
    flex-shrink: 0;
    border-radius: 12px;
  }

  .qr-card__label {
    margin-top: 0;
    text-align: left;
  }

  .qr-card__label strong {
    font-size: 13px;
    line-height: 1.35;
  }

  .qr-card__label span {
    font-size: 11px;
  }

  .feature-overview {
    margin-top: 28px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .feature-card {
    padding: 18px 16px;
    border-radius: 14px;
    box-shadow: 0 10px 24px rgba(25, 62, 41, 0.05);
  }

  .feature-card h3 {
    font-size: 16px;
    line-height: 1.4;
  }

  .section {
    margin-top: 34px;
  }

  .section-head h2 {
    font-size: 22px;
    line-height: 1.24;
  }

  .co-growth {
    padding: 22px 16px;
    gap: 16px;
    border-radius: 18px;
  }

  .co-growth__copy h2 {
    font-size: 20px;
  }

  .co-growth__copy p {
    font-size: 14px;
  }

  .co-growth__list {
    gap: 10px;
  }

  .co-growth__list article {
    padding: 15px 16px;
    border-radius: 14px;
  }

  .scene-grid {
    gap: 12px;
  }

  .scene-card {
    padding: 18px 16px;
    border-radius: 14px;
    box-shadow: 0 10px 24px rgba(25, 62, 41, 0.05);
  }

  .scene-card h3 {
    font-size: 16px;
    line-height: 1.4;
  }

  .site-footer {
    padding: 24px 0;
    margin-top: 36px;
  }

  .site-footer__inner {
    flex-direction: column;
    gap: 8px;
  }

  .site-footer__meta {
    font-size: 11px;
  }

  .site-footer__record {
    margin-top: 12px;
    padding-top: 12px;
  }

  .site-footer__record a {
    font-size: 11px;
  }
}