/* ========================================
   简账通科技 - 官网样式
   ======================================== */

:root {
  --color-primary: #0c3d4a;
  --color-primary-light: #145a6e;
  --color-accent: #c9922e;
  --color-accent-light: #e8b84a;
  --color-bg: #f7f5f0;
  --color-bg-alt: #eef2f0;
  --color-surface: #ffffff;
  --color-text: #1c2428;
  --color-text-muted: #5a6670;
  --color-border: #d8ddd9;
  --color-border-light: #e8ece9;

  --font-display: "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --shadow-sm: 0 2px 8px rgba(12, 61, 74, 0.06);
  --shadow-md: 0 8px 32px rgba(12, 61, 74, 0.1);
  --shadow-lg: 0 16px 48px rgba(12, 61, 74, 0.12);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

@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 {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ---- Header ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(247, 245, 240, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo-mark {
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

.logo-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-primary);
}

.logo-tag {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.main-nav a {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--color-text-muted);
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition);
}

.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

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

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.25rem;
  background: var(--color-primary);
  color: #fff !important;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  transition: background var(--transition), transform var(--transition);
}

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

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(12, 61, 74, 0.03) 0%, transparent 50%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 39px,
      rgba(12, 61, 74, 0.04) 39px,
      rgba(12, 61, 74, 0.04) 40px
    );
  pointer-events: none;
}

.hero-accent {
  position: absolute;
  top: 15%;
  right: -5%;
  width: 45vw;
  max-width: 600px;
  height: 45vw;
  max-height: 600px;
  background: radial-gradient(circle, rgba(201, 146, 46, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.hero-eyebrow::before {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--color-accent);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  letter-spacing: 0.02em;
}

.hero-title em {
  font-style: normal;
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-size: 0.925rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  background: rgba(12, 61, 74, 0.04);
}

/* ---- Sections ---- */
section {
  padding: var(--space-2xl) 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-xl);
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.section-desc {
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* ---- Advantages ---- */
.advantages {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.advantage-card {
  padding: var(--space-lg) var(--space-md);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  transition: transform var(--transition), box-shadow var(--transition);
}

.advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.advantage-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-accent);
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.advantage-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

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

/* ---- Intro ---- */
.intro {
  position: relative;
}

.intro-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.intro-content p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  font-size: 1.05rem;
}

.intro-visual {
  position: relative;
  aspect-ratio: 4/3;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.intro-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 29px,
      rgba(255, 255, 255, 0.06) 29px,
      rgba(255, 255, 255, 0.06) 30px
    ),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 29px,
      rgba(255, 255, 255, 0.06) 29px,
      rgba(255, 255, 255, 0.06) 30px
    );
}

.intro-quote {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #fff;
}

.intro-quote .quote-main {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--space-md);
}

.intro-quote .quote-sub {
  font-size: 0.9rem;
  opacity: 0.75;
  letter-spacing: 0.2em;
}

/* ---- CTA Banner ---- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  padding: var(--space-xl) 0;
}

.cta-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.cta-banner-text {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
  max-width: 640px;
}

.cta-banner .btn-primary {
  background: var(--color-accent);
  color: var(--color-text);
  flex-shrink: 0;
}

.cta-banner .btn-primary:hover {
  background: var(--color-accent-light);
}

/* ---- Page Hero (inner pages) ---- */
.page-hero {
  padding-top: calc(var(--header-height) + var(--space-xl));
  padding-bottom: var(--space-xl);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-light);
  position: relative;
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.page-hero p {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  max-width: 560px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb span {
  color: var(--color-border);
}

/* ---- About Page ---- */
.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-xl);
}

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  font-size: 1.05rem;
}

.info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.info-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-accent);
}

.info-list li {
  display: flex;
  flex-direction: column;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.info-list li:last-child {
  border-bottom: none;
}

.info-list .label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.info-list .value {
  font-size: 0.95rem;
  color: var(--color-text);
  font-weight: 500;
}

.philosophy {
  background: var(--color-primary);
  padding: var(--space-xl) 0;
  margin-top: var(--space-xl);
}

.philosophy-inner {
  text-align: center;
}

.philosophy h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-lg);
  font-weight: 400;
}

.philosophy-values {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.philosophy-values span {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  color: #fff;
  position: relative;
}

.philosophy-values span:not(:last-child)::after {
  content: "｜";
  position: absolute;
  right: calc(var(--space-lg) * -0.65);
  color: var(--color-accent);
  font-weight: 300;
}

/* ---- Services Page ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-accent);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition);
}

.service-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.service-card:hover::before {
  transform: scaleY(1);
}

.service-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: rgba(12, 61, 74, 0.08);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.service-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.service-card.featured {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border: none;
}

.service-card.featured .service-number {
  color: rgba(255, 255, 255, 0.15);
}

.service-card.featured h3 {
  color: #fff;
}

.service-card.featured p {
  color: rgba(255, 255, 255, 0.85);
}

.service-card.featured::before {
  background: var(--color-accent);
  transform: scaleY(1);
}

/* ---- Contact Page ---- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.contact-info-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.contact-info-block h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

.contact-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.contact-item:last-child {
  border-bottom: none;
}

.contact-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  font-size: 1.1rem;
}

.contact-item-content h4 {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.contact-item-content p,
.contact-item-content a {
  font-size: 1rem;
  color: var(--color-text);
  font-weight: 500;
}

.contact-item-content a:hover {
  color: var(--color-primary);
}

.contact-map {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.contact-map-placeholder {
  text-align: center;
  padding: var(--space-lg);
  color: var(--color-text-muted);
}

.contact-map-placeholder .map-pin {
  font-size: 3rem;
  margin-bottom: var(--space-sm);
  color: var(--color-accent);
}

.contact-map-placeholder h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.75);
  padding: var(--space-xl) 0 var(--space-lg);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-brand .logo-name {
  color: #fff;
  font-size: 1.15rem;
  margin-bottom: var(--space-sm);
  display: block;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.footer-col ul li {
  margin-bottom: var(--space-xs);
}

.footer-col a {
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.85rem;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a:hover {
  color: #fff;
}

/* ---- Animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .intro-inner {
    grid-template-columns: 1fr;
  }

  .about-content {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

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

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-md);
    gap: 0;
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
  }

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

  .main-nav a {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border-light);
  }

  .main-nav .nav-cta {
    margin-top: var(--space-sm);
    text-align: center;
    justify-content: center;
  }

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

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

  .service-card.featured {
    grid-column: auto;
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }

  .cta-banner-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .philosophy-values span:not(:last-child)::after {
    display: none;
  }

  .philosophy-values {
    gap: var(--space-md);
  }
}

@media (max-width: 480px) {
  :root {
    --space-xl: 3rem;
    --space-2xl: 4rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }
}