/* =========================================
   KAIYUN 开户平台 · Site Kit 共享样式
   /assets/site.css
   ========================================= */

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

[hidden] {
  display: none !important;
}

/* ---------- CSS Variables ---------- */
:root {
  --color-primary: #0B1B3D;
  --color-primary-light: #142B52;
  --color-primary-glow: #1E3A66;
  --color-accent: #3C8D5C;
  --color-accent-light: #4CAF7D;
  --color-gold: #C9A227;
  --color-gold-dark: #8C6A1F;
  --color-bg-soft: #E8F0FE;
  --color-text: #2A2A2A;
  --color-bg-foot: #F5F7FA;
  --color-white: #FFFFFF;
  --color-border: #8C6A1F;
  --color-line: #D7E0EC;

  --font-heading: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  --font-data: 'JetBrains Mono', 'Menlo', 'Consolas', monospace;

  --rail-width: 240px;
  --content-max: 1280px;
  --shadow-hard: 6px 6px 0 0 rgba(11, 27, 61, 0.85);
  --shadow-soft: 0 12px 32px rgba(11, 27, 61, 0.16);
  --focus-ring: 3px solid var(--color-gold);
}

/* ---------- Base Typography ---------- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.2;
  color: var(--color-primary);
}

h1 { font-size: 48px; }
h2 { font-size: 32px; }
h3 { font-size: 24px; }
p { margin-bottom: 1rem; }
a { color: var(--color-primary); }
strong { font-weight: 700; }

.data-font {
  font-family: var(--font-data);
}

/* ---------- Focus & Accessibility ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  left: -9999px;
  top: 12px;
  z-index: 9999;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 16px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 2px;
}

.skip-link:focus-visible {
  left: 12px;
}

/* ---------- Scroll Progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.15);
  z-index: 9999;
  pointer-events: none;
}

.scroll-progress-bar {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  transition: width 0.1s linear;
}

/* ---------- Header ---------- */
.site-header {
  position: relative;
  background: var(--color-white);
}

.header-ribbon {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.75);
  padding: 6px 32px;
  font-size: 13px;
}

.ribbon-dot {
  width: 7px;
  height: 7px;
  background: var(--color-accent-light);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(76, 175, 125, 0.3);
  flex-shrink: 0;
}

.ribbon-text {
  font-family: var(--font-data);
  letter-spacing: 0.4px;
}

.ribbon-site {
  margin-left: auto;
  color: var(--color-gold);
  font-size: 12px;
  letter-spacing: 1.5px;
  white-space: nowrap;
}

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 32px;
  background: var(--color-white);
  border-bottom: 3px solid var(--color-primary);
  box-shadow: 0 2px 0 0 var(--color-gold-dark) inset;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 38px;
  border-radius: 50% / 55%;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 20px;
  box-shadow: 0 3px 0 0 var(--color-gold-dark);
  flex-shrink: 0;
}

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

.brand-name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 22px;
  color: var(--color-primary);
  letter-spacing: 1px;
}

.brand-tag {
  font-size: 11px;
  color: var(--color-gold-dark);
  border-left: 2px solid var(--color-gold);
  padding-left: 6px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tool-search,
.tool-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 2px solid var(--color-primary);
  border-radius: 2px;
  cursor: pointer;
  color: var(--color-primary);
  transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

.tool-search:hover,
.tool-nav:hover {
  background: var(--color-primary);
  color: #fff;
}

.tool-search:active,
.tool-nav:active {
  transform: scale(0.96);
}

.burger-line {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  margin: 3px auto;
  border-radius: 1px;
}

/* ---------- Search Panel ---------- */
.search-panel {
  background: var(--color-bg-soft);
  border-bottom: 3px solid var(--color-primary);
  padding: 16px 32px;
}

.search-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 860px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.search-label {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--color-primary);
  white-space: nowrap;
  border: 2px solid var(--color-primary);
  padding: 4px 10px;
  background: var(--color-white);
}

.search-field {
  flex: 1;
  min-width: 180px;
  border: 2px solid var(--color-primary);
  background: var(--color-white);
  padding: 8px 12px;
  font-family: var(--font-body);
  font-size: 14px;
  outline: none;
  color: var(--color-text);
}

.search-field:focus {
  border-color: var(--color-gold-dark);
  box-shadow: 0 0 0 2px rgba(201, 162, 39, 0.25);
}

.search-hint {
  font-size: 12px;
  color: var(--color-gold-dark);
  white-space: nowrap;
}

.search-close {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  padding: 2px 8px;
}

.search-close:hover {
  color: var(--color-gold-dark);
}

/* ---------- Site Nav (Rail / Drawer) ---------- */
.site-nav {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: min(320px, 88vw);
  background: var(--color-primary);
  color: #fff;
  display: flex;
  flex-direction: column;
  transform: translateX(-110%);
  transition: transform 0.3s ease;
  z-index: 1000;
  border-right: 3px solid var(--color-gold-dark);
  overflow-y: auto;
}

.site-nav[data-open] {
  transform: translateX(0);
  box-shadow: 6px 0 24px rgba(0, 0, 0, 0.45);
}

.nav-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 24px 20px 16px;
  border-bottom: 2px solid rgba(255, 255, 255, 0.15);
}

.nav-head-title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 18px;
  color: #fff;
  letter-spacing: 2px;
}

.nav-head-version {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-gold);
  border: 1px solid var(--color-gold-dark);
  padding: 2px 8px;
  letter-spacing: 1px;
}

.nav-close {
  margin-left: auto;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.8);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  padding: 2px 6px;
}

.nav-close:hover {
  color: var(--color-gold);
}

.nav-list {
  list-style: none;
  padding: 12px 0;
  flex: 1;
}

.nav-item a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.nav-item a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.nav-item a[aria-current="page"] {
  background: linear-gradient(90deg, rgba(60, 141, 92, 0.85) 0%, rgba(60, 141, 92, 0.35) 100%);
  color: #fff;
  border-left-color: var(--color-gold);
}

.nav-index {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-gold);
  opacity: 0.75;
  min-width: 20px;
}

.nav-item a[aria-current="page"] .nav-index {
  opacity: 1;
}

.nav-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.5px;
}

.nav-arrow {
  margin-left: auto;
  font-size: 16px;
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.nav-item a:hover .nav-arrow,
.nav-item a[aria-current="page"] .nav-arrow {
  opacity: 1;
  transform: translateX(0);
}

.nav-foot {
  border-top: 2px solid rgba(255, 255, 255, 0.15);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.nav-foot-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}

.nav-foot-value {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--color-accent-light);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 32px 24px;
  margin-top: 80px;
  border-top: 4px solid var(--color-gold-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1.2fr 1fr;
  gap: 40px;
  max-width: var(--content-max);
  margin: 0 auto;
}

.footer-brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 38px;
  border-radius: 50% / 55%;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 20px;
  box-shadow: 0 3px 0 0 var(--color-gold-dark);
  vertical-align: middle;
  margin-right: 10px;
}

.footer-brand-name {
  display: inline-block;
  vertical-align: middle;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 20px;
  color: #fff;
  letter-spacing: 1px;
}

.footer-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 16px;
  line-height: 1.7;
}

.footer-icp {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-gold);
  border: 1px solid var(--color-gold-dark);
  padding: 2px 8px;
  letter-spacing: 0.5px;
}

.footer-copy {
  margin-top: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

.footer-title {
  font-size: 14px;
  color: var(--color-gold);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 14px;
  font-weight: 700;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-nav ul,
.footer-legal ul {
  list-style: none;
}

.footer-nav li,
.footer-legal li {
  margin-bottom: 8px;
}

.footer-nav a,
.footer-legal a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-nav a:hover,
.footer-legal a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-contact .contact-line {
  font-size: 14px;
  margin-bottom: 8px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.75);
}

.footer-bottom {
  max-width: var(--content-max);
  margin: 48px auto 0;
  padding-top: 20px;
  border-top: 2px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-updated {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--color-accent-light);
  letter-spacing: 0.3px;
}

.footer-trust {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  text-align: right;
}

/* ---------- Layout & Containers ---------- */
.page-container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 32px 32px 64px;
}

.editorial-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.grid-span-3 { grid-column: span 3; }
.grid-span-4 { grid-column: span 4; }
.grid-span-5 { grid-column: span 5; }
.grid-span-6 { grid-column: span 6; }
.grid-span-7 { grid-column: span 7; }
.grid-span-8 { grid-column: span 8; }
.grid-span-9 { grid-column: span 9; }
.grid-span-12 { grid-column: span 12; }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  font-size: 14px;
}

.breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.crumb-sep {
  color: var(--color-gold-dark);
  font-family: var(--font-data);
}

.crumb-current {
  font-family: var(--font-data);
  color: var(--color-gold-dark);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: 3px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  border-radius: 2px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}

.btn:active {
  transform: translate(0, 0);
  box-shadow: 2px 2px 0 0 rgba(11, 27, 61, 0.85);
}

.btn[data-variant="accent"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.btn[data-variant="ghost"] {
  background: transparent;
  color: var(--color-primary);
}

.btn[data-variant="ghost"]:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn[data-variant="gold"] {
  background: var(--color-gold);
  border-color: var(--color-gold-dark);
  color: var(--color-primary);
}

.btn[data-variant="gold"]:hover {
  box-shadow: 6px 6px 0 0 rgba(140, 106, 31, 0.85);
}

/* ---------- Data & Editorial Components ---------- */
.catalog-block {
  position: relative;
  border: 3px solid var(--color-primary);
  background: var(--color-white);
  padding: 24px;
  box-shadow: var(--shadow-soft);
}

.catalog-block::before {
  content: attr(data-index);
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-gold-dark);
  border: 2px solid var(--color-gold-dark);
  padding: 2px 10px;
  position: absolute;
  top: -14px;
  left: 16px;
  background: var(--color-white);
}

.annotate {
  font-size: 13px;
  color: var(--color-gold-dark);
  border-left: 3px solid var(--color-gold);
  padding: 10px 16px;
  background: rgba(201, 162, 39, 0.06);
  margin: 16px 0;
  line-height: 1.7;
}

.data-line {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--color-primary);
  background: var(--color-bg-soft);
  padding: 12px 16px;
  border: 2px solid var(--color-primary-light);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.stat-card {
  background: var(--color-white);
  border: 3px solid var(--color-primary);
  padding: 20px 24px;
  box-shadow: var(--shadow-soft);
  border-radius: 2px;
}

.stat-value {
  font-family: var(--font-data);
  font-size: 32px;
  color: var(--color-gold-dark);
  font-weight: 700;
  line-height: 1.2;
}

.stat-label {
  font-size: 13px;
  color: var(--color-text);
  letter-spacing: 0.5px;
  margin-top: 4px;
}

.img-frame {
  position: relative;
  width: 100%;
  overflow: hidden;
  border: 3px solid var(--color-primary);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary-glow));
  aspect-ratio: 16 / 9;
}

.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.img-frame::after {
  content: attr(data-caption);
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 8px 12px;
  background: rgba(11, 27, 61, 0.78);
  color: rgba(255, 255, 255, 0.9);
  font-size: 12px;
  font-family: var(--font-data);
  letter-spacing: 0.3px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 13px;
  font-weight: 600;
  background: var(--color-bg-soft);
  color: var(--color-primary);
  border: 2px solid var(--color-primary-light);
  border-radius: 2px;
}

.badge[data-tone="gold"] {
  background: rgba(201, 162, 39, 0.1);
  color: var(--color-gold-dark);
  border-color: var(--color-gold-dark);
}

.badge[data-tone="green"] {
  background: rgba(60, 141, 92, 0.1);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.section-leading {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 16px;
  margin: 48px 0 24px;
  padding-bottom: 16px;
  border-bottom: 4px solid var(--color-primary);
}

.lead-no {
  font-family: var(--font-data);
  font-size: 14px;
  color: var(--color-gold-dark);
  padding-top: 6px;
  letter-spacing: 1px;
}

.section-leading h2 {
  margin: 0;
}

/* ---------- Desktop Rail Layout ---------- */
@media (min-width: 1024px) {
  body {
    padding-left: var(--rail-width);
  }

  .site-nav {
    transform: none;
    width: var(--rail-width);
    transition: none;
  }

  .nav-close {
    display: none;
  }

  .tool-nav {
    display: none;
  }

  .scroll-progress {
    left: var(--rail-width);
    width: calc(100% - var(--rail-width));
  }
}

/* ---------- Tablet ---------- */
@media (max-width: 1023px) and (min-width: 700px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .header-ribbon {
    padding: 6px 20px;
  }

  .header-bar {
    padding: 12px 20px;
  }
}

/* ---------- Mobile ---------- */
@media (max-width: 699px) {
  .header-ribbon {
    padding: 6px 16px;
    font-size: 12px;
  }

  .ribbon-site {
    display: none;
  }

  .header-bar {
    padding: 10px 16px;
  }

  .brand-badge {
    width: 40px;
    height: 32px;
    font-size: 17px;
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-tag {
    font-size: 10px;
  }

  .search-panel {
    padding: 12px 16px;
  }

  .search-hint {
    width: 100%;
    margin-left: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .footer-trust {
    text-align: left;
  }

  .page-container {
    padding: 24px 16px 48px;
  }

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

  .grid-span-3,
  .grid-span-4,
  .grid-span-5,
  .grid-span-6,
  .grid-span-7,
  .grid-span-8,
  .grid-span-9,
  .grid-span-12 {
    grid-column: span 1;
  }

  h1 { font-size: 32px; }
  h2 { font-size: 24px; }
  h3 { font-size: 20px; }

  .section-leading {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .section-leading .lead-no {
    padding-top: 0;
  }
}

/* ---------- Reduced Motion ---------- */
@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;
    scroll-behavior: auto !important;
  }

  .scroll-progress-bar {
    transition: none;
  }

  .site-nav {
    transition: none;
  }
}