:root {
  --color-primary: #ca8a04;
  --color-primary-dark: #92400e;
  --color-text-primary: #1c1917;
  --color-text-secondary: #57534e;
  --color-text-tertiary: #78716c;
  --color-border: #e7e5e4;
  --color-surface: #ffffff;
  --color-bg: #fafaf9;
  --color-bg-secondary: #f5f5f4;
  --color-success: #166534;
  --color-warning: #b45309;
  --color-danger: #8c2727;
  --shadow-soft: 0 18px 54px rgba(28, 25, 23, 0.08);
  --shadow-lift: 0 26px 72px rgba(28, 25, 23, 0.14), 0 8px 24px rgba(202, 138, 4, 0.14);
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --page-max: 1280px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 8%, rgba(202, 138, 4, 0.12), transparent 28rem),
    linear-gradient(180deg, #fffefa 0%, var(--color-bg) 34%, #ffffff 100%);
  color: var(--color-text-primary);
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "PingFang SC", serif;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(28, 25, 23, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 25, 23, 0.035) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 68%);
}

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

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

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

.site-header,
.site-footer,
.main-nav,
.login-actions,
.hero-actions,
.section-heading,
.filter-row,
.card-kicker {
  display: flex;
  align-items: center;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 42px;
  border-bottom: 1px solid rgba(231, 229, 228, 0.9);
  background: rgba(250, 250, 249, 0.92);
  backdrop-filter: blur(18px);
}

.brand-slot {
  display: grid;
  min-width: 168px;
  min-height: 58px;
  padding: 9px 16px;
  border: 1px solid rgba(202, 138, 4, 0.32);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #ffffff 0%, #fff7df 100%);
}

.brand-name {
  font-size: 24px;
  font-weight: 1000;
  letter-spacing: -0.04em;
}

.brand-note {
  color: var(--color-text-tertiary);
  font-family: "Source Han Sans SC", "PingFang SC", sans-serif;
  font-size: 11px;
  font-weight: 800;
}

.main-nav {
  justify-content: center;
  gap: 22px;
  color: var(--color-text-secondary);
  font-family: "Source Han Sans SC", "PingFang SC", sans-serif;
  font-size: 14px;
  font-weight: 900;
}

.main-nav a:hover,
.site-footer a:hover {
  color: var(--color-primary-dark);
}

.login-actions {
  gap: 10px;
}

.header-link,
.solid-button,
.ghost-button,
.search-row button,
.lead-form button,
.discovery-card a,
.filter-row button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-family: "Source Han Sans SC", "PingFang SC", sans-serif;
  font-weight: 900;
}

.header-link,
.ghost-button,
.filter-row button {
  padding: 0 16px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--color-primary-dark);
}

.solid-button,
.header-link-primary,
.search-row button,
.lead-form button {
  padding: 0 18px;
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #ffffff;
}

.login-menu {
  position: relative;
}

.login-menu > summary {
  list-style: none;
  cursor: pointer;
  user-select: none;
}

.login-menu > summary::-webkit-details-marker {
  display: none;
}

.login-menu > summary::after {
  content: "\25BE";
  margin-left: 6px;
  color: var(--color-text-tertiary);
  font-size: 12px;
}

.login-menu[open] > summary {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  border-color: var(--color-primary);
}

.login-menu .login-providers {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  display: grid;
  gap: 6px;
  min-width: 168px;
  padding: 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
  z-index: 40;
}

.login-menu .provider-button {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  min-height: 38px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  font-family: "Source Han Sans SC", "PingFang SC", sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.login-menu .provider-button:hover,
.login-menu .provider-button:focus-visible {
  background: #fff7df;
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
  outline: none;
}

.login-menu .provider-button::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-text-tertiary);
}

.login-menu .provider-wechat::before {
  background: #07c160;
}

.login-menu .provider-douyin::before {
  background: #1c1917;
}

.login-menu .provider-xhs::before {
  background: #ff2442;
}

.hero-section,
.section-block,
.commerce-section,
.business-section {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 72px 32px;
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  gap: 42px;
  align-items: end;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--color-primary-dark);
  font-family: "Source Han Sans SC", "PingFang SC", sans-serif;
  font-size: 12px;
  font-weight: 1000;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 830px;
  margin-bottom: 22px;
  font-size: clamp(42px, 6vw, 86px);
  line-height: 0.98;
  letter-spacing: -0.08em;
}

h2 {
  margin-bottom: 10px;
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.06em;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
  line-height: 1.22;
}

p {
  color: var(--color-text-secondary);
  line-height: 1.76;
}

.hero-copy > p {
  max-width: 720px;
  font-size: 18px;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.search-panel,
.lead-form,
.discovery-card,
.module-card {
  border: 1px solid rgba(231, 229, 228, 0.98);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-soft);
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}

.search-panel:hover,
.search-panel:focus-within,
.lead-form:hover,
.lead-form:focus-within,
.discovery-card:hover,
.module-card:hover {
  border-color: rgba(202, 138, 4, 0.45);
  box-shadow: var(--shadow-lift);
  transform: translateY(-4px);
}

.search-panel {
  padding: 24px;
}

.search-panel label,
.lead-form span {
  display: block;
  margin-bottom: 10px;
  color: var(--color-text-secondary);
  font-family: "Source Han Sans SC", "PingFang SC", sans-serif;
  font-size: 13px;
  font-weight: 900;
}

.search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.search-row input,
.lead-form input,
.lead-form select {
  min-width: 0;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text-primary);
}

#search-status,
.form-status {
  margin: 12px 0 0;
  font-family: "Source Han Sans SC", "PingFang SC", sans-serif;
  font-size: 13px;
}

.section-block,
.commerce-section,
.business-section {
  border-top: 1px solid rgba(231, 229, 228, 0.85);
}

.section-heading {
  justify-content: space-between;
  gap: 26px;
  margin-bottom: 26px;
}

.section-heading > div:first-child {
  max-width: 640px;
}

.filter-row {
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  max-width: 540px;
}

.filter-row button {
  min-height: 36px;
  padding: 0 13px;
  color: var(--color-text-secondary);
  font-size: 13px;
}

.filter-row button.active {
  border-color: var(--color-text-primary);
  background: var(--color-text-primary);
  color: #ffffff;
}

.waterfall-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.discovery-card {
  overflow: hidden;
}

.discovery-card:nth-child(even) {
  transform: translateY(32px);
}

.discovery-card:nth-child(even):hover {
  transform: translateY(26px);
}

.discovery-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center top;
  background: var(--color-bg-secondary);
  filter: saturate(0.92) contrast(1.02);
  transition:
    filter 220ms ease,
    transform 260ms ease;
}

.discovery-card:hover img {
  filter: saturate(1.06) contrast(1.06);
  transform: scale(1.045);
}

.card-body,
.module-card {
  padding: 18px;
}

.card-kicker {
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  color: var(--color-text-secondary);
  font-family: "Source Han Sans SC", "PingFang SC", sans-serif;
  font-size: 12px;
  font-weight: 900;
}

.card-kicker span {
  min-width: 0;
}

.card-kicker strong,
.module-card span {
  color: var(--color-success);
  white-space: nowrap;
}

.discovery-card a {
  width: 100%;
  min-height: 38px;
  margin-top: 10px;
  color: var(--color-primary-dark);
  font-size: 13px;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.module-card span {
  display: inline-block;
  margin-bottom: 14px;
  font-family: "Source Han Sans SC", "PingFang SC", sans-serif;
  font-size: 12px;
  font-weight: 900;
}

.module-card strong {
  display: block;
  margin-top: 16px;
  font-size: 24px;
}

.business-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 0.7fr);
  gap: 40px;
}

.lead-form {
  display: grid;
  gap: 16px;
  padding: 26px;
}

.lead-form button:disabled {
  border-color: var(--color-border);
  background: var(--color-bg-secondary);
  color: var(--color-text-tertiary);
  cursor: not-allowed;
}

.site-footer {
  justify-content: space-between;
  gap: 24px;
  padding: 32px 42px;
  border-top: 1px solid var(--color-border);
}

.footer-brand {
  min-height: 54px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
  color: var(--color-text-secondary);
  font-family: "Source Han Sans SC", "PingFang SC", sans-serif;
  font-weight: 900;
}

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

  .discovery-card,
  .discovery-card:hover,
  .search-panel:hover,
  .search-panel:focus-within,
  .lead-form:hover,
  .lead-form:focus-within,
  .module-card:hover {
    transform: none;
  }
}

@media (max-width: 1120px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .main-nav,
  .login-actions {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .hero-section,
  .business-section {
    grid-template-columns: 1fr;
  }

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

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .filter-row {
    justify-content: flex-start;
  }
}

@media (max-width: 680px) {
  .site-header,
  .site-footer {
    padding: 16px;
  }

  .hero-section,
  .section-block,
  .commerce-section,
  .business-section {
    padding: 48px 16px;
  }

  .search-row,
  .waterfall-grid,
  .module-grid {
    grid-template-columns: 1fr;
  }

  .discovery-card:nth-child(even),
  .discovery-card:nth-child(even):hover {
    transform: none;
  }
}