:root {
  --navy: #0f2f4f;
  --navy-2: #173d63;
  --ink: #1d2630;
  --muted: #5f6d7a;
  --paper: #f5f7fa;
  --panel: #fff;
  --line: #dce3ea;
  --orange: #f28c28;
  --brand-accent: #c65316;
  --shadow: 0 18px 46px rgba(20, 38, 56, 0.12);
}

/* Flow order is communicated by numbered steps; decorative arrows are omitted. */
.category-landing .step::after {
  display: none !important;
  content: none !important;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.7;
}

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

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(240px, auto) 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 14px clamp(18px, 4vw, 58px);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 58px;
  height: 58px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 8px;
  background: var(--navy);
  color: #fff;
  font-size: 14px;
  font-weight: 900;
  line-height: 1.15;
  text-align: center;
}

.brand strong {
  display: block;
  color: var(--brand-accent);
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.08;
}

.brand span:last-child {
  display: block;
  margin-top: 5px;
  color: #34495c;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  color: #35485a;
  font-size: 14px;
  font-weight: 850;
}

.nav a:hover {
  color: var(--orange);
}

.header-quote,
.card-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  border-radius: 6px;
  background: var(--navy);
  color: #fff;
  font-weight: 850;
}

.header-quote {
  width: 56px;
  height: 56px;
  padding: 0 8px;
  text-align: center;
  line-height: 1.15;
  white-space: normal;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: clamp(34px, 6vw, 58px) clamp(18px, 4vw, 58px) 26px;
  background:
    linear-gradient(90deg, rgba(15, 47, 79, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(15, 47, 79, 0.04) 1px, transparent 1px),
    var(--paper);
  background-size: 42px 42px;
}

.hero > div:first-child {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px 16px;
  align-items: center;
}

.eyebrow {
  grid-column: 1;
  grid-row: 1;
  margin: 0;
  color: var(--orange);
  font-size: 15px;
  font-weight: 900;
}

.hero-kicker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 10px;
}

.hero-kicker .eyebrow {
  margin: 0;
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  grid-column: 1;
  grid-row: 1;
  margin: 0;
  color: var(--navy);
  font-size: clamp(32px, 4.6vw, 54px);
  line-height: 1.08;
}

.lead {
  grid-column: 1 / -1;
  grid-row: 2;
  max-width: 720px;
  margin: 0;
  color: #3d4a56;
  font-size: 16px;
  line-height: 1.75;
}

.tags {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 8px;
  margin: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.home-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--navy);
  border-radius: 6px;
  background: #fff;
  color: var(--navy);
  font-weight: 850;
}

.home-back:hover {
  border-color: var(--orange);
  color: var(--orange);
}

.tag {
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #eef3f7;
  color: #425464;
  font-size: 13px;
  font-weight: 800;
}

.hero-media {
  display: none;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.hero-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #fff;
}

.hero-panel {
  display: none;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--line);
}

.hero-panel span {
  display: grid;
  min-height: 58px;
  place-items: center;
  padding: 8px;
  background: #fff;
  color: var(--navy);
  font-size: 14px;
  font-weight: 850;
  text-align: center;
}

section {
  padding: 26px clamp(18px, 4vw, 58px);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(180px, 0.3fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  margin-bottom: 12px;
}

.section-head h2 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(24px, 2.5vw, 32px);
  line-height: 1.18;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 10px;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card,
.system,
.contact-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.card {
  display: grid;
  grid-template-rows: 1fr auto;
  min-height: 0;
  overflow: hidden;
}

.card-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 14px;
  align-items: start;
  padding: 14px 16px;
}

.card h3,
.system h3 {
  margin: 0 0 8px;
  color: var(--navy);
  font-size: 20px;
  line-height: 1.26;
}

.card h3 {
  grid-column: 1;
  grid-row: 1;
  margin: 0;
}

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

.card p {
  grid-column: 1 / -1;
  grid-row: 2;
}

.card-meta {
  display: flex;
  align-items: center;
  min-height: 36px;
  padding: 6px 16px;
  border-top: 1px solid var(--line);
  color: var(--orange);
  font-size: 14px;
  font-weight: 900;
}

.card-link {
  grid-column: 2;
  grid-row: 1;
  align-self: start;
  min-height: 32px;
  margin-top: 0;
  padding: 0 11px;
  font-size: 14px;
}

.system {
  padding: 14px 16px;
  border-left: 4px solid var(--orange);
}

.dark-band {
  background: var(--navy);
  color: #fff;
  padding-top: 24px;
  padding-bottom: 24px;
}

.dark-band .section-head h2,
.dark-band h3 {
  color: #fff;
}

.dark-band .section-head p,
.dark-band .system p {
  color: rgba(255, 255, 255, 0.78);
}

.dark-band .system {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  align-items: stretch;
  counter-reset: flow;
}

.step {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 5px 9px;
  align-content: start;
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.step:not(:last-child)::after {
  content: "→";
  position: absolute;
  top: 50%;
  right: -20px;
  width: 16px;
  height: 16px;
  color: #ff9a3d;
  font-size: 22px;
  font-weight: 900;
  line-height: 16px;
  transform: translateY(-50%);
}

.step b {
  grid-row: 1 / span 2;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(255, 154, 61, 0.45);
  border-radius: 50%;
  color: #ff9a3d;
  font-size: 14px;
}

.step h3 {
  margin: 0;
  font-size: 17px;
}

.step p {
  grid-column: 2;
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  line-height: 1.5;
}

.renovation-flow {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px 22px;
}

.renovation-flow .step:nth-child(4n)::after {
  display: none;
}

.renovation-decisions .system {
  min-height: 128px;
}

.contact-card {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 1.1fr);
  gap: 14px;
  padding: 18px;
  background: linear-gradient(135deg, var(--navy), var(--navy-2));
  color: #fff;
}

.contact-card h2 {
  margin: 0 0 6px;
  color: #fff;
  font-size: clamp(22px, 2.2vw, 28px);
}

.contact-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.55;
}

.contact-list {
  display: grid;
  gap: 6px;
}

.contact-list div {
  padding: 8px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.1);
}

footer {
  display: grid;
  gap: 6px;
  justify-items: center;
  padding: 24px clamp(18px, 4vw, 58px) 36px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

@media (max-width: 1080px) {
  .topbar {
    grid-template-columns: 1fr auto;
  }

  .header-quote {
    grid-column: 2;
    grid-row: 1;
  }

  .nav {
    grid-column: 1 / -1;
    justify-content: flex-start;
  }

  .hero,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .step {
    grid-template-columns: auto minmax(0, 1fr);
    padding: 9px 12px;
  }

  .step:not(:last-child)::after {
    content: "↓";
    top: auto;
    right: auto;
    bottom: -17px;
    left: 24px;
    width: 16px;
    height: 16px;
    font-size: 18px;
    line-height: 16px;
    transform: none;
  }

  .renovation-flow .step:nth-child(4n)::after {
    display: block;
  }

  .renovation-flow .step:last-child::after {
    display: none;
  }
}

@media (max-width: 760px) {
  .topbar {
    position: sticky;
    gap: 10px;
    padding: 12px 20px;
  }

  .brand strong {
    font-size: 22px;
  }

  .brand span:last-child {
    font-size: 13px;
  }

  .header-quote {
    width: 52px;
    height: 52px;
    min-height: 52px;
    padding: 0 7px;
    font-size: 14px;
  }

  .nav {
    gap: 10px 14px;
    font-size: 14px;
  }

  .hero {
    padding: 28px 20px 30px;
  }

  .hero > div:first-child {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 10px 12px;
  }

  .tags {
    justify-content: flex-start;
    gap: 6px;
  }

  .tag {
    padding: 4px 9px;
    font-size: 12px;
  }

  h1 {
    grid-column: 1;
    grid-row: 1;
    font-size: 30px;
  }

  .lead {
    grid-row: 2;
    font-size: 14px;
    line-height: 1.7;
  }

  .section-head,
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-panel span {
    min-height: 42px;
  }

  section {
    padding: 20px 20px;
  }

  .section-head {
    gap: 8px;
    margin-bottom: 10px;
  }

  .card {
    min-height: 0;
  }

  .card-main {
    grid-template-columns: minmax(0, 1fr) auto;
    padding: 12px 14px;
  }

  .card h3,
  .system h3 {
    font-size: 19px;
  }

  .card-link {
    min-width: 86px;
  }

  .card-meta {
    min-height: 34px;
    padding: 5px 14px;
  }

  .system {
    padding: 12px 14px;
  }

  .dark-band {
    padding-top: 18px;
    padding-bottom: 18px;
  }

  .contact-card {
    gap: 10px;
    padding: 16px;
  }

  .contact-card h2 {
    margin-bottom: 4px;
  }

  .contact-card p {
    font-size: 14px;
    line-height: 1.5;
  }

  .contact-list {
    gap: 5px;
  }

  .contact-list div {
    padding: 7px 9px;
  }

  .dark-band .section-head p {
    font-size: 14px;
    line-height: 1.55;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 10px;
    overflow-x: visible;
    padding: 0;
    scroll-snap-type: none;
  }

  .step {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 4px 8px;
    padding: 9px 10px;
    border: 1px solid rgba(255, 255, 255, 0.18);
  }

  .step:not(:last-child)::after {
    content: "↓";
    top: auto;
    right: auto;
    bottom: -17px;
    left: 20px;
    width: 18px;
    height: 18px;
    font-size: 21px;
    line-height: 18px;
    transform: none;
  }

  .step b {
    width: 28px;
    height: 28px;
    font-size: 13px;
  }

  .step h3 {
    font-size: 16px;
  }

  .step p {
    font-size: 12px;
    line-height: 1.45;
  }
}

/* Category landing pages share the homepage's calmer, centered composition. */
.category-landing {
  --category-max: 1360px;
  overflow-x: hidden;
}

.category-landing .topbar {
  grid-template-columns: 360px minmax(0, 1fr) auto;
  min-height: 80px;
  padding: 12px max(20px, calc((100vw - var(--category-max)) / 2));
}

.category-landing .brand {
  gap: 12px;
}

.category-landing .brand-mark {
  display: block;
  width: 52px;
  height: 52px;
  border-radius: 8px;
  background: none;
}

.category-landing .brand strong {
  white-space: nowrap;
  font-size: 20px;
}

.category-landing .brand-tagline {
  margin-top: 3px;
  font-size: 13px;
}

.category-landing .nav {
  flex-wrap: nowrap;
  gap: clamp(12px, 1.25vw, 19px);
  white-space: nowrap;
}

.category-landing .header-quote {
  width: auto;
  height: 42px;
  min-height: 42px;
  padding: 0 16px;
  white-space: nowrap;
}

.category-landing main > section {
  width: min(calc(100% - 32px), var(--category-max));
  margin-right: auto;
  margin-left: auto;
}

.category-landing .hero {
  grid-template-columns: minmax(0, 0.84fr) minmax(0, 1.16fr);
  gap: clamp(32px, 4vw, 58px);
  min-height: 430px;
  padding: 48px clamp(18px, 3vw, 42px);
  border-bottom: 1px solid var(--line);
}

.category-landing .hero > div:first-child {
  display: block;
}

.category-landing h1 {
  margin-bottom: 18px;
  white-space: nowrap;
  font-size: clamp(34px, 3.6vw, 52px);
}

.category-landing .lead {
  max-width: 610px;
  font-size: 17px;
}

.category-landing .tags {
  display: flex;
  margin-top: 22px;
}

.category-landing .tag {
  padding: 6px 11px;
  border-radius: 6px;
  background: #fff;
}

.category-landing .tag-special,
.category-landing .tag-activity {
  border-color: transparent;
  background: var(--navy);
  color: #fff;
  box-shadow: 0 4px 12px rgba(13, 50, 82, 0.16);
}

.category-landing .tag-special:hover,
.category-landing .tag-special:focus-visible,
.category-landing .tag-activity:hover,
.category-landing .tag-activity:focus-visible {
  background: #174f7d;
}

.category-landing .hero-media {
  display: block;
  margin: 0;
  aspect-ratio: 16 / 9;
  background: #f8fafb;
  box-shadow: 0 14px 34px rgba(20, 38, 56, 0.11);
}

.category-landing .hero-media img {
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  object-fit: contain;
}

.category-landing main > section:not(.hero) {
  padding: 38px clamp(18px, 3vw, 42px);
}

.category-landing .activity-space-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #eef3f7;
}

.category-landing .grid-3 {
  gap: 16px;
}

.category-landing .card-main {
  min-height: 128px;
  padding: 18px;
}

.category-landing .card-meta {
  padding: 8px 18px;
}

.category-landing .card-link {
  min-width: 0;
  border: 1px solid rgba(15, 47, 79, 0.12);
  background: #eef3f7;
  color: var(--navy);
  font-size: 13px;
}

.category-landing .card:hover .card-link {
  background: var(--navy);
  color: #fff;
}

.category-landing .dark-band {
  margin-top: 10px;
  margin-bottom: 10px;
  border-radius: 8px;
}

@media (max-width: 1080px) {
  .category-landing .topbar {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .category-landing .nav {
    grid-column: 1 / -1;
    flex-wrap: wrap;
    justify-content: flex-start;
    row-gap: 6px;
    overflow-x: visible;
    padding-bottom: 2px;
    white-space: normal;
  }

  .category-landing .nav::-webkit-scrollbar {
    display: none;
  }
}

@media (max-width: 860px) {
  .category-landing .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    gap: 24px;
  }

  .category-landing .hero-media {
    aspect-ratio: 16 / 9;
  }
}

@media (max-width: 680px) {
  .category-landing .topbar {
    position: sticky;
    display: flex;
    flex-wrap: wrap;
    gap: 8px 12px;
    padding: 8px 16px 0;
  }

  .category-landing .brand {
    flex: 0 0 100%;
    padding-right: 76px;
  }

  .category-landing .brand-mark {
    width: 36px;
    height: 36px;
  }

  .category-landing .brand strong {
    font-size: 13px;
  }

  .category-landing .brand-tagline {
    display: none;
  }

  .category-landing .header-quote {
    position: absolute;
    top: 9px;
    right: 16px;
    height: 34px;
    min-height: 34px;
    padding: 0 9px;
    font-size: 12px;
  }

  .category-landing .nav {
    flex: 0 0 calc(100% + 32px);
    gap: 4px 18px;
    margin: 0 -16px;
    padding: 8px 16px 10px;
    border-top: 1px solid rgba(15, 47, 79, 0.08);
    font-size: 13px;
    white-space: normal;
  }

  .category-landing main > section {
    width: calc(100% - 20px);
  }

  .category-landing .hero {
    padding: 28px 10px 30px;
  }

  .category-landing h1 {
    margin-bottom: 12px;
    font-size: clamp(28px, 9vw, 42px);
  }

  .category-landing .lead {
    font-size: 15px;
  }

  .category-landing .tags {
    gap: 7px;
    margin-top: 16px;
  }

  .category-landing main > section:not(.hero) {
    padding: 28px 10px;
  }

  .category-landing .card-main {
    min-height: 0;
    padding: 16px;
  }

  .category-landing .card-meta {
    padding: 7px 16px;
  }

  .category-landing .dark-band {
    border-radius: 6px;
  }
}