/* 南京颜如朝华网络科技有限公司 — 官网样式（深色精研 + 微光） */

:root {
  --bg-deep: #06070a;
  --bg-elevated: #0e1016;
  --bg-card: rgba(255, 255, 255, 0.035);
  --text: #eceae6;
  --text-muted: #8b909e;
  --accent: #c9a87c;
  --accent-bright: #e4c9a0;
  --accent-glow: rgba(201, 168, 124, 0.22);
  --border: rgba(255, 255, 255, 0.09);
  --grid-line: rgba(255, 255, 255, 0.04);
  --font-display: "Songti SC", "SimSun", STSong, "Noto Serif SC", serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", sans-serif;
  --max: 1080px;
  --header-h: 4.25rem;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-soft: 0 24px 80px rgba(0, 0, 0, 0.45);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
}

/* 背景：细网格 + 柔光晕 + 微粒感 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 120% 80% at 20% -20%, var(--accent-glow), transparent 55%),
    radial-gradient(ellipse 90% 60% at 100% 30%, rgba(90, 120, 140, 0.12), transparent 50%),
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size:
    auto,
    auto,
    48px 48px,
    48px 48px;
  pointer-events: none;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.14;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.55' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  body::after {
    display: none;
  }
}

a {
  color: var(--accent-bright);
  text-decoration: none;
  transition: color 0.2s var(--ease-out), opacity 0.2s var(--ease-out);
}

a:hover {
  color: var(--text);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--accent);
  color: var(--bg-deep);
  font-weight: 600;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* —— 顶栏 —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
  background: rgba(6, 7, 10, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.site-header__inner {
  width: 100%;
  max-width: calc(var(--max) + 3rem);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.site-logo {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text);
  white-space: nowrap;
}

.site-logo:hover {
  color: var(--accent-bright);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1.75rem;
}

.site-nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--text);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle__bars span {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.25s var(--ease-out), opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.5rem 1.5rem;
    gap: 0;
    background: rgba(8, 9, 12, 0.97);
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition:
      transform 0.35s var(--ease-out),
      opacity 0.25s var(--ease-out),
      visibility 0.25s;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav a {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 1rem;
  }

  .site-nav a:last-child {
    border-bottom: none;
  }
}

/* —— 主内容区 —— */
main {
  overflow-x: clip;
}

.section {
  padding: clamp(3.5rem, 10vw, 6.5rem) clamp(1.25rem, 4vw, 2rem);
}

.section__inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section__label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.28em;
  color: var(--accent);
  margin: 0 0 1rem;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.5vw, 2.35rem);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 1.25rem;
  letter-spacing: 0.02em;
}

.section__lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 38rem;
  margin: 0;
}

/* Hero */
.hero {
  min-height: calc(100vh - var(--header-h));
  min-height: calc(100dvh - var(--header-h));
  display: flex;
  align-items: center;
  padding-top: 2rem;
  padding-bottom: 4rem;
}

.hero__inner {
  max-width: var(--max);
  margin: 0 auto;
  width: 100%;
}

.hero__eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.35em;
  color: var(--text-muted);
  margin: 0 0 1.5rem;
  animation: fadeUp 0.9s var(--ease-out) both;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 7vw, 3.75rem);
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 1.5rem;
  letter-spacing: 0.03em;
  animation: fadeUp 0.9s var(--ease-out) 0.08s both;
}

.hero__title em {
  font-style: normal;
  color: var(--accent-bright);
}

.hero__sub {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 32rem;
  margin: 0 0 2.5rem;
  line-height: 1.85;
  animation: fadeUp 0.9s var(--ease-out) 0.16s both;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  animation: fadeUp 0.9s var(--ease-out) 0.24s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.6rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    background 0.25s var(--ease-out),
    border-color 0.25s var(--ease-out),
    color 0.25s var(--ease-out);
}

.btn--primary {
  background: var(--accent);
  color: var(--bg-deep);
  border-color: var(--accent);
  font-weight: 600;
}

.btn--primary:hover {
  background: var(--accent-bright);
  color: var(--bg-deep);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
}

.hero__deco {
  margin-top: clamp(3rem, 12vw, 5rem);
  height: 1px;
  max-width: 12rem;
  background: linear-gradient(90deg, var(--accent), transparent);
  animation: fadeUp 0.9s var(--ease-out) 0.32s both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 关于 */
.about-block {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}

@media (min-width: 860px) {
  .about-block {
    grid-template-columns: 1fr 1.05fr;
  }
}

.about-block__aside {
  position: relative;
  padding: 2rem 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 2px;
  box-shadow: var(--shadow-soft);
}

.about-block__aside::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 1.75rem;
  right: 1.75rem;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.7;
}

.about-block__stat {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--accent-bright);
  margin: 0 0 0.35rem;
  line-height: 1;
}

.about-block__stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
  letter-spacing: 0.06em;
}

.about-block__body p {
  color: var(--text-muted);
  margin: 0 0 1.1rem;
}

.about-block__body p:last-child {
  margin-bottom: 0;
}

/* 业务卡片 */
.pillars {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .pillars {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .pillars {
    grid-template-columns: repeat(4, 1fr);
  }
}

.pillar-card {
  padding: 1.65rem 1.4rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 2px;
  transition:
    border-color 0.3s var(--ease-out),
    transform 0.35s var(--ease-out),
    box-shadow 0.35s var(--ease-out);
}

.pillar-card:hover {
  border-color: rgba(201, 168, 124, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.pillar-card__num {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.pillar-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 0 0 0.65rem;
  font-weight: 600;
}

.pillar-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 联系 */
.contact-panel {
  display: grid;
  gap: 2rem;
  padding: clamp(2rem, 5vw, 2.75rem);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 2px;
  box-shadow: var(--shadow-soft);
}

@media (min-width: 720px) {
  .contact-panel {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

.contact-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.contact-panel__list li {
  margin-bottom: 1rem;
  color: rgba(236, 234, 230, 0.88);
  font-size: 0.95rem;
}

.contact-panel__list li:last-child {
  margin-bottom: 0;
}

.contact-panel__list strong {
  display: block;
  color: var(--text);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.contact-panel__note {
  font-size: 0.85rem;
  color: rgba(200, 204, 214, 0.95);
  line-height: 1.75;
  margin: 0;
  padding-left: 1rem;
  border-left: 2px solid var(--accent);
}

/* 页脚 */
.site-footer {
  padding: 3rem clamp(1.25rem, 4vw, 2rem) 2.5rem;
  border-top: 1px solid var(--border);
  background: var(--bg-deep);
}

.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  text-align: center;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.35rem 0.65rem;
  margin: 0 0 1.1rem;
}

.footer-row a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-row a:hover {
  color: var(--accent-bright);
}

.footer-row .sep {
  color: var(--border);
  font-size: 0.65rem;
  user-select: none;
}

.site-footer p {
  margin: 0.5rem 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.site-footer .icp a {
  color: var(--text-muted);
}

.site-footer .icp a:hover {
  color: var(--accent-bright);
}

/* 合规内页：短内容时页脚贴视口底 */
body.page-legal {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

body.page-legal .site-header {
  position: relative;
  flex-shrink: 0;
}

body.page-legal .legal-main {
  flex: 1 0 auto;
}

body.page-legal .site-footer {
  flex-shrink: 0;
}

.legal-main {
  padding: clamp(2.5rem, 6vw, 4rem) clamp(1.25rem, 4vw, 2rem) 4rem;
}

.legal-article {
  max-width: 42rem;
  margin: 0 auto;
}

.legal-article h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2rem);
  margin: 0 0 1.5rem;
  font-weight: 600;
}

.legal-article p {
  color: var(--text-muted);
  margin: 0 0 1rem;
}

.legal-article .back {
  margin-top: 2rem;
}