/* Telog Official Website
   Clean SaaS-style static site for telog.cn
*/

:root {
  --bg: #ffffff;
  --bg-soft: #f7f9fc;
  --bg-muted: #eef2f7;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --accent: #0b6bcb;
  --accent-hover: #0958a8;
  --accent-soft: #e8f1fb;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
  --radius: 14px;
  --container: 1080px;
  --header-h: 68px;
  --font: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--accent);
  text-decoration: none;
}

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

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.nav {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand:hover {
  color: var(--text);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: block;
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.12);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: inline-block;
  padding: 0.45rem 0.8rem;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: var(--accent-soft);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--text);
  border-radius: 2px;
  transition: 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  padding: 5.5rem 0 4.5rem;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 85% 10%, rgba(11, 107, 203, 0.08), transparent 55%),
    radial-gradient(ellipse 60% 50% at 10% 90%, rgba(29, 78, 216, 0.05), transparent 50%),
    linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 5vw, 3.6rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  margin: 0.85rem 0 0;
  font-size: 1.35rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.hero-desc {
  margin: 1.4rem 0 0;
  max-width: 34rem;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.7rem 1.25rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s ease;
}

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

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

.btn-secondary {
  background: #fff;
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover {
  border-color: #cbd5e1;
  color: var(--text);
  background: var(--bg-soft);
}

.hero-panel {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.hero-panel-title {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 600;
}

.metric-list {
  display: grid;
  gap: 0.85rem;
}

.metric-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.95rem 1rem;
  border-radius: 12px;
  background: var(--bg-soft);
  border: 1px solid transparent;
}

.metric-dot {
  width: 10px;
  height: 10px;
  margin-top: 0.45rem;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.metric-item strong {
  display: block;
  font-size: 0.98rem;
  margin-bottom: 0.15rem;
}

.metric-item span {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Sections */
.section {
  padding: 4.5rem 0;
}

.section-soft {
  background: var(--bg-soft);
}

.section-header {
  max-width: 40rem;
  margin-bottom: 2.2rem;
}

.section-header h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2rem);
  letter-spacing: -0.02em;
}

.section-header p {
  margin: 0.75rem 0 0;
  color: var(--text-muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.35rem;
}

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.08rem;
}

.feature-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.96rem;
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  margin-bottom: 0.9rem;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.9rem;
}

.note-box {
  margin-top: 1.5rem;
  padding: 1rem 1.15rem;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Page hero (inner pages) */
.page-hero {
  padding: 3.4rem 0 2.2rem;
  background: linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(1.9rem, 3.5vw, 2.5rem);
  letter-spacing: -0.02em;
}

.page-hero p {
  margin: 0.75rem 0 0;
  max-width: 40rem;
  color: var(--text-muted);
}

/* Content / legal */
.content {
  padding: 2.8rem 0 4.5rem;
}

.content-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: clamp(1.4rem, 3vw, 2.2rem);
}

.legal h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.2rem;
}

.legal section:first-of-type h2 {
  margin-top: 1.5rem;
}

.legal h3 {
  margin: 1.25rem 0 0.45rem;
  font-size: 1.02rem;
  color: var(--text);
}

.legal p,
.legal li {
  color: var(--text-secondary);
}

.legal ul,
.legal ol {
  padding-left: 1.2rem;
}

.legal li + li {
  margin-top: 0.35rem;
}

.legal code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.86em;
  background: var(--bg-muted);
  color: var(--text);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  word-break: break-all;
}

.legal-doc .notice,
.legal-doc .legal,
.legal-doc .apple {
  border-radius: 12px;
  padding: 1rem 1.1rem;
  font-size: 0.92rem;
  margin: 1.25rem 0;
}

.legal-doc .notice {
  background: #fffbeb;
  border: 1px solid #fde68a;
  color: #78350f;
}

.legal-doc .notice p,
.legal-doc .notice li {
  color: inherit;
}

.legal-doc .legal {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.legal-doc .apple {
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
}

.legal-doc .toc {
  font-size: 0.92rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  margin: 1.25rem 0 0.5rem;
}

.legal-doc .toc ol {
  margin: 0.5rem 0 0;
}

.legal-doc .contact-box {
  background: var(--accent-soft);
  border: 1px solid #bfdbfe;
  border-radius: 12px;
  padding: 1rem 1.1rem;
  font-size: 0.95rem;
  margin: 1rem 0;
}

.legal-doc .tip,
.legal-doc .fleet-box,
.legal-doc .ref-box {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}

.legal-doc {
  overflow-x: auto;
}

.legal-doc table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
  margin: 0.85rem 0 1rem;
}

.legal-doc table th,
.legal-doc table td {
  border: 1px solid var(--border);
  padding: 0.55rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

.legal-doc table th {
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--text);
}

.meta-line {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
}

.contact-item {
  padding: 1.25rem 1.3rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-soft);
}

.contact-item h3 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
}

.contact-item p {
  margin: 0;
  color: var(--text-muted);
}

.contact-item a {
  font-weight: 600;
  font-size: 1.1rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
  padding: 2.2rem 0 1.6rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.5rem;
}

.footer-brand {
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
}

.footer-brand:hover {
  color: var(--text);
}

.footer-desc {
  margin: 0.6rem 0 0;
  color: var(--text-muted);
  font-size: 0.92rem;
  max-width: 22rem;
}

.footer-col h4 {
  margin: 0 0 0.7rem;
  font-size: 0.92rem;
  color: var(--text);
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 0.4rem;
}

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

.footer-bottom {
  margin-top: 1.8rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.86rem;
}

.icp-placeholder {
  color: var(--text-muted);
}

.icp-placeholder:hover {
  color: var(--accent);
}

/* Home footer */
.site-footer-home {
  padding: 2.4rem 0 2rem;
}

.footer-home {
  text-align: center;
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.45rem 0.65rem;
  margin-bottom: 0.85rem;
  font-size: 0.92rem;
}

.footer-legal-links a {
  color: var(--text-secondary);
  font-weight: 500;
}

.footer-legal-links a:hover {
  color: var(--accent);
}

.footer-sep {
  color: var(--border);
}

.footer-copy {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-icp {
  margin: 0.45rem 0 0;
  font-size: 0.86rem;
}

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

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

.footer-police {
  margin: 0.45rem 0 0;
  font-size: 0.86rem;
}

.footer-police a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  color: var(--text-muted);
  line-height: 1.2;
}

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

.footer-police-icon {
  display: block;
  width: 18px;
  height: 20px;
  flex-shrink: 0;
}

.footer-bottom-beian {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
}

.footer-bottom .footer-police {
  margin: 0;
}

.footer-bottom .icp-placeholder {
  color: var(--text-muted);
}

/* Utilities */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Responsive */
@media (max-width: 860px) {
  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
    padding: 0.75rem 1rem 1rem;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 0.75rem 0.9rem;
  }

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

  .hero {
    padding: 3.5rem 0 3rem;
  }

  .section {
    padding: 3.2rem 0;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}