/* ============================================================
   365乐登 全站共享样式 Site Kit
   技术蓝图 · 坐标网格 · 现代粗野
   /assets/site.css
   ============================================================ */

/* ---------- 1. CSS 变量 ---------- */
:root {
  --blue-deep:  #0A3D6E;
  --blue-dark:  #061A2A;
  --blue-mid:   #1E5A94;
  --blue-sky:   #E6F0FA;
  --orange:     #FF6B35;
  --chili:      #E34234;
  --gray-light: #F5F7FA;
  --ink:        #101820;
  --white:      #FFFFFF;

  --font-head: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", Consolas, monospace;

  --border-w: 2px;
  --border-w-lg: 4px;
  --shadow-sm: 3px 3px 0 rgba(10, 61, 110, 0.18);
  --shadow:    6px 6px 0 rgba(10, 61, 110, 0.18);
  --container: 1200px;
  --gap: 24px;
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

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

ul,
ol {
  list-style: none;
}

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

/* ---------- 3. 基础排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
}

p {
  margin-bottom: 1em;
}

p:last-child {
  margin-bottom: 0;
}

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

/* ---------- 4. 布局容器 ---------- */
.container {
  width: min(var(--container), 92%);
  margin-inline: auto;
}

.main-content {
  min-height: 55vh;
}

.main-content a:not(.btn) {
  color: var(--blue-deep);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-decoration-color: var(--orange);
  text-underline-offset: 4px;
}

.main-content a:not(.btn):hover {
  background: var(--blue-sky);
}

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

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

.section {
  padding-block: 3.5rem;
}

.section-head {
  margin-bottom: 2rem;
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.55rem, 3.4vw, 2.5rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--blue-deep);
}

.section-lead {
  max-width: 68ch;
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--ink);
}

/* ---------- 5. 通用组件 ---------- */
.card {
  border: var(--border-w) solid var(--blue-deep);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  padding: 0.8rem 0 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.breadcrumb-item {
  color: var(--blue-mid);
}

.breadcrumb-item a {
  color: var(--blue-deep);
  font-weight: 700;
}

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

.breadcrumb-item + .breadcrumb-item::before {
  content: "→";
  margin-right: 0.4rem;
  color: var(--orange);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue-deep);
}

.kicker::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 4px;
  background: var(--orange);
  box-shadow: 3px 3px 0 var(--blue-deep);
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: var(--blue-mid);
}

.tag {
  display: inline-block;
  padding: 0.18em 0.65em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1.5px solid var(--blue-deep);
  color: var(--blue-deep);
}

.tag-orange {
  color: var(--chili);
  border-color: var(--orange);
  background: #FFF3EE;
}

.tag-blue {
  background: var(--blue-sky);
}

.coord-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--blue-mid);
}

.coord-badge::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--orange);
  color: var(--orange);
  font-size: 0.85rem;
  font-weight: 900;
  line-height: 1;
}

.img-card {
  position: relative;
  overflow: hidden;
  border: var(--border-w) solid var(--blue-deep);
  background-color: var(--blue-sky);
  background-image:
    linear-gradient(rgba(10, 61, 110, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 61, 110, 0.12) 1px, transparent 1px);
  background-size: 22px 22px;
  box-shadow: var(--shadow-sm);
}

.img-card:not(:has(img)) {
  aspect-ratio: 4 / 3;
}

.img-card::before {
  content: "IMG";
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 2;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  background: var(--white);
  border: 1px solid var(--blue-deep);
  color: var(--blue-deep);
}

.img-card:has(img)::before {
  display: none;
}

.img-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: relative;
  z-index: 1;
  transition: transform 0.4s ease;
}

.img-card:hover img {
  transform: scale(1.02);
}

/* ---------- 6. 按钮体系 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.75em 1.5em;
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  border: var(--border-w) solid var(--blue-deep);
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
  background: var(--blue-deep);
  color: var(--white);
  box-shadow: 4px 4px 0 var(--orange);
}

.btn-primary:hover {
  background: var(--blue-dark);
  color: var(--white);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--orange);
}

.btn-primary:active {
  transform: scale(0.98);
  box-shadow: 2px 2px 0 var(--orange);
}

.btn-outline {
  background: transparent;
  color: var(--blue-deep);
  box-shadow: 4px 4px 0 var(--blue-sky);
}

.btn-outline:hover {
  background: var(--blue-sky);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(30, 90, 148, 0.25);
}

.btn-outline:active {
  transform: scale(0.98);
  box-shadow: 2px 2px 0 rgba(30, 90, 148, 0.25);
}

/* ---------- 7. 焦点与跳转 ---------- */
:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 10001;
  padding: 0.8em 1.4em;
  background: var(--orange);
  color: var(--ink);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  border: var(--border-w) solid var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
  transition: top 0.25s ease;
}

.skip-link:focus {
  top: 16px;
}

/* ---------- 8. 滚动进度扫描线 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10000;
  height: 4px;
  width: 0;
  background: linear-gradient(90deg, var(--orange), var(--chili));
  pointer-events: none;
  transition: width 0.15s linear;
}

/* ---------- 9. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--white);
  border-bottom: var(--border-w-lg) solid var(--blue-deep);
}

.top-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.35rem max(4vw, calc((100vw - var(--container)) / 2));
  background-color: var(--blue-dark);
  background-image:
    linear-gradient(rgba(230, 240, 250, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230, 240, 250, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(230, 240, 250, 0.66);
  white-space: nowrap;
  overflow: hidden;
}

.meta-index {
  color: var(--orange);
  font-weight: 700;
}

.meta-icp {
  color: rgba(230, 240, 250, 0.45);
}

.header-main {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 68px;
}

.header-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-logo {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  background: var(--blue-deep);
  border: var(--border-w) solid var(--ink);
  box-shadow: 3px 3px 0 var(--orange);
}

.brand-logo::before,
.brand-logo::after {
  content: "";
  position: absolute;
  background: rgba(255, 255, 255, 0.32);
  z-index: 1;
}

.brand-logo::before {
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
}

.brand-logo::after {
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
}

.logo-cross {
  position: absolute;
  top: 5px;
  left: 5px;
  width: 12px;
  height: 12px;
  z-index: 2;
}

.logo-cross::before,
.logo-cross::after {
  content: "";
  position: absolute;
  background: var(--white);
}

.logo-cross::before {
  top: 5px;
  left: 0;
  width: 12px;
  height: 2px;
}

.logo-cross::after {
  left: 5px;
  top: 0;
  width: 2px;
  height: 12px;
}

.logo-dot {
  position: absolute;
  right: 4px;
  bottom: 4px;
  width: 12px;
  height: 12px;
  background: var(--orange);
  border: var(--border-w) solid var(--ink);
  z-index: 2;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--blue-deep);
  line-height: 1.1;
}

.brand-name::after {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-left: 5px;
  background: var(--orange);
  vertical-align: 3px;
}

.brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--blue-mid);
  margin-top: 3px;
}

.header-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-item {
  flex-shrink: 0;
}

.nav-link {
  position: relative;
  display: block;
  padding: 0.58em 0.95em;
  font-family: var(--font-head);
  font-size: 0.94rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  color: var(--blue-deep);
  white-space: nowrap;
  border: var(--border-w) solid transparent;
  transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.nav-link:hover {
  background: var(--blue-sky);
  color: var(--ink);
  border-color: var(--blue-deep);
  transform: translateY(-2px);
  box-shadow: 0 3px 0 var(--orange);
}

.nav-link[aria-current="page"] {
  background: var(--orange);
  color: var(--ink);
  border-color: var(--ink);
  box-shadow: 3px 3px 0 rgba(16, 24, 32, 0.85);
}

.nav-link[aria-current="page"]:hover {
  background: var(--orange);
  color: var(--ink);
  border-color: var(--ink);
  transform: translateY(0);
  box-shadow: 3px 3px 0 rgba(16, 24, 32, 0.85);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.btn-login {
  font-family: var(--font-head);
  font-size: 0.86rem;
  padding: 0.7em 1.25em;
  letter-spacing: 0.08em;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: var(--border-w) solid var(--blue-deep);
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: background 0.15s ease;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 3px;
  background: var(--blue-deep);
  transition: transform 0.25s ease, opacity 0.2s ease, background 0.15s ease;
}

.nav-toggle:hover {
  background: var(--blue-sky);
}

.nav-toggle[aria-expanded="true"] {
  background: var(--orange);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar {
  background: var(--ink);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ---------- 10. 页脚 ---------- */
.site-footer {
  background-color: var(--blue-dark);
  background-image:
    linear-gradient(rgba(230, 240, 250, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230, 240, 250, 0.045) 1px, transparent 1px);
  background-size: 30px 30px;
  border-top: var(--border-w-lg) solid var(--orange);
  color: rgba(230, 240, 250, 0.8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1.1fr 1fr 1.1fr;
  gap: 2.5rem;
  padding-block: 3.25rem 2.25rem;
}

.footer-brand-card,
.footer-nav-card,
.footer-legal-card,
.footer-contact-card {
  min-width: 0;
}

.footer-brand-card {
  padding-right: 1rem;
}

.footer-logo {
  position: relative;
  display: block;
  width: 44px;
  height: 44px;
  margin-bottom: 1rem;
  background: var(--blue-deep);
  border: var(--border-w) solid var(--blue-sky);
  box-shadow: 4px 4px 0 var(--orange);
}

.footer-logo::before,
.footer-logo::after {
  content: "";
  position: absolute;
  background: rgba(230, 240, 250, 0.3);
}

.footer-logo::before {
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
}

.footer-logo::after {
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
}

.footer-logo-dot {
  position: absolute;
  right: 4px;
  bottom: 4px;
  width: 12px;
  height: 12px;
  background: var(--orange);
  border: 1px solid var(--blue-sky);
  z-index: 1;
}

.footer-brand-name {
  font-family: var(--font-head);
  font-size: 1.45rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 0.6rem;
}

.footer-trust {
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(230, 240, 250, 0.72);
  max-width: 36ch;
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 1.1rem;
}

.footer-title::before {
  content: "// ";
  color: var(--orange);
  font-weight: 900;
}

.footer-list li {
  margin-bottom: 0.42rem;
}

.footer-list a {
  display: inline-block;
  position: relative;
  color: rgba(230, 240, 250, 0.82);
  font-size: 0.93rem;
  transition: color 0.12s ease, padding-left 0.12s ease;
}

.footer-list a:hover {
  color: var(--white);
  padding-left: 12px;
}

.footer-list a:hover::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 2px;
  background: var(--orange);
  transform: translateY(-50%);
}

.footer-contact-list li {
  font-size: 0.9rem;
  line-height: 1.65;
  color: rgba(230, 240, 250, 0.82);
}

.contact-label {
  display: inline-block;
  width: 3.2em;
  margin-right: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
}

.contact-note {
  margin-top: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px dashed rgba(230, 240, 250, 0.18);
  font-size: 0.82rem;
  color: rgba(230, 240, 250, 0.58);
}

.footer-icp {
  display: inline-block;
  margin-top: 1.1rem;
  padding: 0.42em 0.75em;
  border: 1px solid rgba(230, 240, 250, 0.28);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: rgba(230, 240, 250, 0.6);
}

.footer-bottom {
  background: rgba(6, 26, 42, 0.7);
  border-top: 1px solid rgba(230, 240, 250, 0.16);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem 2rem;
  width: min(var(--container), 92%);
  margin-inline: auto;
  padding-block: 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(230, 240, 250, 0.52);
}

.footer-copy,
.footer-edition {
  margin: 0;
}

/* ---------- 11. 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .col-span-3,
  .col-span-4 {
    grid-column: span 6;
  }

  .col-span-8,
  .col-span-9 {
    grid-column: span 12;
  }
}

@media (max-width: 960px) {
  .nav-toggle {
    display: flex;
  }

  .header-main {
    flex-wrap: wrap;
  }

  .header-nav {
    order: 5;
    flex: 1 0 100%;
    margin-left: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.28s ease;
  }

  .header-nav[data-open="true"] {
    max-height: 30rem;
    overflow-y: auto;
    border-top: var(--border-w) solid var(--orange);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 0 0.75rem;
  }

  .nav-item {
    width: 100%;
    flex-shrink: 1;
  }

  .nav-link,
  .nav-link:hover {
    white-space: normal;
    border: 0;
    border-bottom: 1px solid var(--blue-sky);
    transform: none;
    box-shadow: none;
  }

  .nav-link:hover {
    background: var(--blue-sky);
    padding-left: 1.2em;
  }

  .nav-link[aria-current="page"],
  .nav-link[aria-current="page"]:hover {
    background: var(--orange);
    color: var(--ink);
    border-bottom: var(--border-w) solid var(--ink);
    transform: none;
    box-shadow: 3px 3px 0 rgba(16, 24, 32, 0.85);
  }
}

@media (max-width: 640px) {
  .brand-subtitle {
    display: none;
  }

  .brand-logo {
    width: 36px;
    height: 36px;
  }

  .brand-name {
    font-size: 1.15rem;
  }

  .meta-coord {
    display: none;
  }

  .top-meta-bar {
    font-size: 0.6rem;
  }

  .btn-login {
    font-size: 0.78rem;
    padding: 0.62em 1em;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-block: 2.5rem 1.75rem;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .grid-12 {
    grid-template-columns: 1fr;
  }

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

/* ---------- 12. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}