/* 舒浩（京山市）智能科技有限公司 — 官网样式 */

:root {
  --color-bg: #f3f6f2;
  --color-bg-deep: #0c2a22;
  --color-surface: #ffffff;
  --color-ink: #14201b;
  --color-ink-muted: #4a5c54;
  --color-brand: #146b52;
  --color-brand-deep: #0a3d30;
  --color-accent: #d4a017;
  --color-accent-soft: #f0e2b0;
  --color-line: rgba(20, 32, 27, 0.12);
  --color-mist: #dce8e1;
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --radius: 2px;
  --shadow-soft: 0 18px 50px rgba(12, 42, 34, 0.12);
  --max: 1120px;
  --nav-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

/* —— 氛围背景 —— */
.page-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(20, 107, 82, 0.14), transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(212, 160, 23, 0.1), transparent 50%),
    linear-gradient(180deg, #eef4ef 0%, var(--color-bg) 40%, #e8efe9 100%);
}

.page-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23146b52' fill-opacity='0.06'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

/* —— 导航 —— */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background 0.35s var(--ease), box-shadow 0.35s var(--ease), backdrop-filter 0.35s;
}

.site-header.is-scrolled {
  background: rgba(243, 246, 242, 0.88);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--color-line);
}

.site-header.is-transparent:not(.is-scrolled) {
  background: transparent;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 2;
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: var(--color-brand-deep);
}

.brand-sub {
  font-size: 0.68rem;
  color: var(--color-ink-muted);
  letter-spacing: 0.12em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.92rem;
  color: var(--color-ink-muted);
  position: relative;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--color-brand-deep);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.nav-links a:hover::after,
.nav-links a.is-active::after {
  transform: scaleX(1);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.15rem;
  background: var(--color-brand);
  color: #fff !important;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  transition: background 0.25s, transform 0.25s var(--ease);
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  background: var(--color-brand-deep);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  position: relative;
  z-index: 2;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px auto;
  background: var(--color-brand-deep);
  transition: 0.3s var(--ease);
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* —— 按钮 —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  transition: transform 0.25s var(--ease), background 0.25s, color 0.25s, border-color 0.25s;
}

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

.btn-primary:hover {
  background: #e0b428;
  transform: translateY(-2px);
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.45);
  color: #fff;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  transform: translateY(-2px);
}

.btn-outline {
  border: 1px solid var(--color-brand);
  color: var(--color-brand-deep);
}

.btn-outline:hover {
  background: var(--color-brand);
  color: #fff;
  transform: translateY(-2px);
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: flex-end;
  padding: calc(var(--nav-h) + 2rem) 0 5rem;
  color: #f5faf7;
  overflow: hidden;
}

.hero-visual {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(160deg, rgba(8, 36, 28, 0.55) 0%, rgba(10, 45, 36, 0.35) 40%, rgba(8, 30, 24, 0.7) 100%),
    linear-gradient(25deg, #0a3d30 0%, #146b52 45%, #1a5c4a 70%, #0c2a22 100%);
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 72% 38%, rgba(212, 160, 23, 0.22) 0%, transparent 28%),
    radial-gradient(ellipse 50% 35% at 30% 70%, rgba(100, 180, 140, 0.2), transparent 60%);
  animation: heroGlow 10s ease-in-out infinite alternate;
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.4;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, transparent, black 30%, black 70%, transparent);
}

.hero-field {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 42%;
  background:
    linear-gradient(180deg, transparent, rgba(8, 28, 22, 0.5)),
    repeating-linear-gradient(
      95deg,
      transparent,
      transparent 18px,
      rgba(180, 210, 160, 0.08) 18px,
      rgba(180, 210, 160, 0.08) 20px
    );
  clip-path: polygon(0 35%, 100% 15%, 100% 100%, 0 100%);
}

.hero-device {
  position: absolute;
  right: 8%;
  top: 22%;
  width: min(340px, 38vw);
  aspect-ratio: 1;
  opacity: 0.9;
  animation: floatDevice 7s ease-in-out infinite;
}

.hero-content {
  position: relative;
  max-width: 640px;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5.5vw, 3.6rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  opacity: 0;
  animation: fadeUp 0.9s var(--ease) 0.15s forwards;
}

.hero-brand span {
  display: block;
  font-size: 0.42em;
  font-family: var(--font-body);
  font-weight: 400;
  letter-spacing: 0.28em;
  opacity: 0.75;
  margin-top: 0.6rem;
}

.hero-lead {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: rgba(245, 250, 247, 0.88);
  max-width: 32em;
  margin-bottom: 0.75rem;
  opacity: 0;
  animation: fadeUp 0.9s var(--ease) 0.35s forwards;
}

.hero-desc {
  font-size: 0.95rem;
  color: rgba(245, 250, 247, 0.68);
  max-width: 36em;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeUp 0.9s var(--ease) 0.5s forwards;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  opacity: 0;
  animation: fadeUp 0.9s var(--ease) 0.65s forwards;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes floatDevice {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-14px);
  }
}

@keyframes heroGlow {
  from {
    opacity: 0.85;
  }
  to {
    opacity: 1;
  }
}

/* —— 通用区块 —— */
.section {
  padding: 5.5rem 0;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--color-brand);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.35rem);
  font-weight: 700;
  color: var(--color-brand-deep);
  letter-spacing: 0.04em;
  line-height: 1.3;
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--color-ink-muted);
  max-width: 36em;
  font-size: 1.02rem;
}

.section-head {
  margin-bottom: 3rem;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* —— 业务亮点 —— */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  border-top: 1px solid var(--color-line);
  padding-top: 3rem;
}

.feature-item {
  position: relative;
  padding-top: 1.25rem;
}

.feature-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 36px;
  height: 3px;
  background: var(--color-accent);
}

.feature-num {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--color-mist);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.75rem;
}

.feature-item h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--color-brand-deep);
}

.feature-item p {
  font-size: 0.95rem;
  color: var(--color-ink-muted);
}

/* —— 服务网格 —— */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.service-block {
  padding: 2rem 2rem 2.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  transition: border-color 0.3s, box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}

.service-block:hover {
  border-color: var(--color-brand);
  box-shadow: var(--shadow-soft);
  transform: translateY(-4px);
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.25rem;
  color: var(--color-brand);
}

.service-block h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.65rem;
  color: var(--color-brand-deep);
}

.service-block p {
  color: var(--color-ink-muted);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.service-list li {
  font-size: 0.9rem;
  color: var(--color-ink);
  padding-left: 1rem;
  position: relative;
}

.service-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  background: var(--color-accent);
}

/* —— 能力条 —— */
.capability {
  background: var(--color-bg-deep);
  color: #e8f2ed;
  position: relative;
  overflow: hidden;
}

.capability::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 50%;
  height: 120%;
  background: radial-gradient(circle, rgba(20, 107, 82, 0.45), transparent 70%);
  pointer-events: none;
}

.capability .section-title {
  color: #fff;
}

.capability .section-desc {
  color: rgba(232, 242, 237, 0.7);
}

.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
}

.cap-item {
  padding: 1.5rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.cap-item strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  color: var(--color-accent-soft);
  font-weight: 600;
}

.cap-item p {
  font-size: 0.88rem;
  color: rgba(232, 242, 237, 0.65);
  line-height: 1.6;
}

/* —— 关于预览 —— */
.about-preview {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
}

.about-visual {
  position: relative;
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(145deg, #0f4c3a 0%, #1a6b52 50%, #0c2a22 100%);
  overflow: hidden;
}

.about-visual::before {
  content: "";
  position: absolute;
  inset: 12%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  pointer-events: none;
}

.about-visual-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  animation: floatDevice 8s ease-in-out infinite;
}

.about-stat {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.about-stat dt {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--color-brand);
  font-weight: 700;
  line-height: 1.2;
}

.about-stat dd {
  font-size: 0.85rem;
  color: var(--color-ink-muted);
  margin-top: 0.25rem;
}

/* —— 页面头 —— */
.page-hero {
  padding: calc(var(--nav-h) + 3.5rem) 0 3.5rem;
  background:
    linear-gradient(160deg, #0c2a22 0%, #146b52 55%, #0a3d30 100%);
  color: #f5faf7;
  position: relative;
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.6;
  pointer-events: none;
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}

.page-hero p {
  color: rgba(245, 250, 247, 0.75);
  max-width: 32em;
  font-size: 1.05rem;
}

/* —— 内容页 —— */
.content-block {
  max-width: 720px;
}

.content-block h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  color: var(--color-brand-deep);
  margin: 2.5rem 0 1rem;
  letter-spacing: 0.03em;
}

.content-block h2:first-child {
  margin-top: 0;
}

.content-block p,
.content-block li {
  color: var(--color-ink-muted);
  margin-bottom: 1rem;
}

.content-block ul {
  margin: 1rem 0 1.5rem;
  padding-left: 0;
}

.content-block li {
  padding-left: 1.15rem;
  position: relative;
  margin-bottom: 0.5rem;
}

.content-block li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background: var(--color-brand);
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.info-table th,
.info-table td {
  text-align: left;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--color-line);
  vertical-align: top;
}

.info-table th {
  width: 8em;
  color: var(--color-brand-deep);
  font-weight: 600;
  background: rgba(20, 107, 82, 0.05);
}

.info-table td {
  color: var(--color-ink-muted);
}

/* —— 联系 —— */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.contact-card {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--color-line);
}

.contact-card h3 {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--color-brand);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.contact-card p,
.contact-card a {
  font-size: 1.1rem;
  color: var(--color-ink);
}

.contact-card a:hover {
  color: var(--color-brand);
}

.contact-note {
  margin-top: 2rem;
  padding: 1.25rem 1.5rem;
  background: var(--color-mist);
  font-size: 0.9rem;
  color: var(--color-ink-muted);
}

/* —— CTA —— */
.cta-band {
  padding: 4.5rem 0;
  text-align: center;
  background:
    linear-gradient(135deg, rgba(20, 107, 82, 0.08), rgba(212, 160, 23, 0.1)),
    var(--color-surface);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.cta-band h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--color-brand-deep);
  margin-bottom: 0.75rem;
  letter-spacing: 0.04em;
}

.cta-band p {
  color: var(--color-ink-muted);
  margin-bottom: 1.75rem;
}

/* —— 页脚（备案关键） —— */
.site-footer {
  background: var(--color-bg-deep);
  color: rgba(232, 242, 237, 0.75);
  padding: 3.5rem 0 2rem;
  font-size: 0.88rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: #fff;
  letter-spacing: 0.05em;
  margin-bottom: 0.85rem;
}

.footer-brand small {
  display: block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  opacity: 0.65;
  margin-top: 0.35rem;
  letter-spacing: 0.08em;
  font-weight: 400;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
  font-weight: 600;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.footer-col a:hover {
  color: var(--color-accent-soft);
}

.footer-bottom {
  padding-top: 1.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom a {
  color: rgba(232, 242, 237, 0.75);
}

.footer-bottom a:hover {
  color: var(--color-accent-soft);
}

.beian-links {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
}

.beian {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* —— 响应式 —— */
@media (max-width: 900px) {
  .features,
  .cap-grid {
    grid-template-columns: 1fr 1fr;
  }

  .about-preview,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-device {
    opacity: 0.35;
    right: -5%;
    width: 55vw;
  }

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

@media (max-width: 720px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    inset: 0;
    background: rgba(243, 246, 242, 0.98);
    flex-direction: column;
    justify-content: center;
    gap: 1.75rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
  }

  .nav-links.is-open {
    opacity: 1;
    visibility: visible;
  }

  .nav-links a {
    font-size: 1.15rem;
  }

  .features,
  .cap-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    align-items: center;
    padding-bottom: 4rem;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .section {
    padding: 4rem 0;
  }
}