/* ==========================================================================
   十博体育app官网版 中文官网 — 全站共享样式 /assets/site.css
   ========================================================================== */

/* ---------- CSS 变量 ---------- */
:root {
  --c-bg: #0B1B2B;
  --c-bg-deep: #071220;
  --c-panel: #0E2235;
  --c-accent: #39FF14;
  --c-hot: #FF6A00;
  --c-text: #F5F7FA;
  --c-dim: #4A6480;
  --c-line: #1E3A5F;
  --c-glass: rgba(11, 27, 43, .85);
  --c-pos: #00D26A;
  --c-neg: #FF4C4C;

  --font-display: "Barlow Condensed", "Oswald", "Arial Narrow", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Cascadia Code", Consolas, "Liberation Mono", monospace;

  --w-container: 1200px;
  --space: 16px;
  --radius: 2px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .28);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, .42);
  --z-nav: 200;
  --z-progress: 9000;
  --z-top: 10000;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  background: var(--c-bg);
  color: var(--c-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

ul,
ol {
  padding-left: 1.2em;
  margin-bottom: 1em;
}

li {
  margin-bottom: .3em;
}

p {
  line-height: 1.8;
  margin-bottom: 1em;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: .03em;
  margin-bottom: .5em;
}

h1 { font-size: clamp(1.9rem, 4vw, 3.1rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.45rem); }
h4 { font-size: 1rem; }

::selection {
  background: var(--c-accent);
  color: var(--c-bg-deep);
}

:focus-visible {
  outline: 2px solid var(--c-hot);
  outline-offset: 2px;
}

/* ---------- 版式容器 ---------- */
.container {
  width: 100%;
  max-width: var(--w-container);
  margin-inline: auto;
  padding-inline: 20px;
}

.main-content {
  flex: 1 1 auto;
  min-height: 70vh;
  position: relative;
}

.section {
  position: relative;
  padding-block: clamp(44px, 7vw, 80px);
}

.section-inverse {
  background: var(--c-bg-deep);
  border-block: 1px solid var(--c-line);
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 30px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
}

.section-index {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--c-accent);
  font-weight: 700;
  letter-spacing: .1em;
}

.section-title {
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 900;
  letter-spacing: .05em;
  line-height: 1.2;
}

.section-more {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .76rem;
  color: var(--c-dim);
  border: 1px solid var(--c-line);
  padding: 4px 12px;
  transition: color .2s, border-color .2s;
}

.section-more:hover {
  color: var(--c-accent);
  border-color: rgba(57, 255, 20, .5);
}

.divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--c-line) 30%, rgba(57, 255, 20, .45) 50%, var(--c-line) 70%, transparent);
  margin-block: 18px;
}

.content-wrap {
  max-width: 72ch;
}

.lead {
  font-size: 1.04rem;
  color: rgba(245, 247, 250, .86);
  line-height: 1.8;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: var(--z-top);
  background: var(--c-accent);
  color: var(--c-bg-deep);
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 700;
  box-shadow: var(--shadow);
  transition: top .2s;
}

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

/* ---------- 顶部数据条 ---------- */
.topbar {
  position: relative;
  background: var(--c-bg-deep);
  border-bottom: 1px solid var(--c-line);
  overflow: hidden;
}

.topbar::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent) 0 24%, var(--c-line) 24% 74%, var(--c-hot) 74% 100%);
}

.topbar-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 20px;
  min-height: 34px;
  padding-block: 6px;
  font-size: .72rem;
  color: var(--c-dim);
  letter-spacing: .06em;
}

.topbar-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--c-accent);
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-hot);
  box-shadow: 0 0 8px var(--c-hot);
  animation: beat 1.5s ease-in-out infinite;
}

@keyframes beat {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(.7); opacity: .6; }
}

.topbar-contact,
.topbar-icp {
  font-family: var(--font-mono);
}

.topbar-download {
  margin-left: auto;
  white-space: nowrap;
}

/* ---------- 杂志报头 ---------- */
.masthead {
  background:
    radial-gradient(70% 140% at 50% -30%, rgba(57, 255, 20, .07), transparent 60%),
    radial-gradient(45% 100% at 90% 120%, rgba(255, 106, 0, .08), transparent 60%);
}

.masthead-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-block: 34px 26px;
}

.masthead-rule {
  display: block;
  width: min(600px, 86%);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-line) 18%, rgba(57, 255, 20, .55) 50%, var(--c-line) 82%, transparent);
}

.masthead-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--c-text);
  padding: 14px 0 6px;
  transition: color .25s;
}

.masthead-brand:hover .brand-name {
  color: var(--c-accent);
  text-shadow: 0 0 40px rgba(57, 255, 20, .4);
}

.brand-name {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 5.5vw, 4rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: .06em;
  color: var(--c-text);
  text-shadow: 0 0 36px rgba(57, 255, 20, .22);
  transition: color .25s, text-shadow .25s;
}

.brand-name em {
  font-family: var(--font-mono);
  font-style: normal;
  color: var(--c-accent);
  font-size: .5em;
  font-weight: 700;
  letter-spacing: .04em;
}

.brand-tagline {
  display: block;
  margin-top: 10px;
  font-size: clamp(.78rem, 1.6vw, .95rem);
  font-weight: 700;
  letter-spacing: .42em;
  text-indent: .42em;
  color: var(--c-dim);
}

.masthead-meta {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--c-dim);
  padding: 6px 0 4px;
  max-width: 92%;
}

/* ---------- 主导航 ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: rgba(7, 18, 32, .92);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-inline: auto;
  list-style: none;
  padding: 0;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  height: 48px;
  padding-inline: 18px;
  font-size: .85rem;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: .08em;
  transition: color .2s, background .2s;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 0;
  height: 2px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s var(--ease);
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  color: var(--c-accent);
  background: linear-gradient(180deg, rgba(255, 106, 0, .08), rgba(57, 255, 20, .04));
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-live {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .7rem;
  color: var(--c-text);
  background: rgba(255, 106, 0, .12);
  border: 1px solid rgba(255, 106, 0, .45);
  padding: 3px 10px;
  letter-spacing: .12em;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--c-line);
  padding: 8px 12px;
  color: var(--c-text);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: .75rem;
  line-height: 1;
}

.nav-toggle:hover {
  border-color: rgba(57, 255, 20, .5);
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  margin: 3px 0;
  background: currentColor;
  transition: transform .25s var(--ease), opacity .2s;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(5px) 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(-5px) rotate(-45deg);
}

.nav-toggle-text {
  font-size: .72rem;
  letter-spacing: .1em;
}

/* ---------- 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: var(--z-progress);
  background: var(--c-bg-deep);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

.scroll-progress::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--c-accent) 0%, var(--c-hot) 100%);
  opacity: .9;
}

/* ---------- 按钮 ---------- */
.btn {
  --bevel: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: .85rem;
  font-weight: 800;
  font-family: var(--font-body);
  line-height: 1.2;
  letter-spacing: .08em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  clip-path: polygon(var(--bevel) 0, 100% 0, 100% calc(100% - var(--bevel)), calc(100% - var(--bevel)) 100%, 0 100%, 0 var(--bevel));
  transition: transform .15s var(--ease), box-shadow .15s, background .2s, color .2s, border-color .2s;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn:active {
  transform: none;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--c-bg), 0 0 0 4px var(--c-hot);
}

.btn-accent {
  background: var(--c-accent);
  color: var(--c-bg-deep);
}

.btn-accent:hover {
  background: #5cff3d;
  box-shadow: 0 6px 24px rgba(57, 255, 20, .35);
}

.btn-hot {
  background: var(--c-hot);
  color: var(--c-bg-deep);
}

.btn-hot:hover {
  background: #ff7f26;
  box-shadow: 0 6px 24px rgba(255, 106, 0, .35);
}

.btn-outline {
  background: transparent;
  color: var(--c-accent);
  border-color: rgba(57, 255, 20, .6);
}

.btn-outline:hover {
  background: rgba(57, 255, 20, .08);
  border-color: var(--c-accent);
}

.btn-ghost {
  background: transparent;
  color: var(--c-text);
  border-color: var(--c-line);
}

.btn-ghost:hover {
  border-color: var(--c-dim);
}

.btn-sm {
  --bevel: 4px;
  padding: 5px 14px;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 700;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
}

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  background: var(--c-glass);
  border: 1px solid var(--c-line);
  box-shadow: var(--shadow);
}

.card-pad {
  padding: 24px;
}

.card-hover {
  transition: transform .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.card-hover:hover {
  transform: translateY(-4px);
  border-color: rgba(57, 255, 20, .45);
  box-shadow: var(--shadow-lg);
}

.card-accent-top {
  border-top: 2px solid var(--c-accent);
}

.card-hot-left {
  border-left: 2px solid var(--c-hot);
}

/* ---------- 研究板 ---------- */
.board {
  display: flex;
  flex-direction: column;
  background: var(--c-glass);
  border: 1px solid var(--c-line);
  box-shadow: var(--shadow);
}

.board-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--c-line);
}

.board-head .tag {
  margin-left: auto;
}

.board-title {
  font-size: .95rem;
  font-weight: 800;
  letter-spacing: .06em;
}

.board-body {
  flex: 1;
  padding: 20px;
  font-size: .9rem;
}

.board-foot {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--c-dim);
}

.board-term {
  border-left: 2px solid var(--c-accent);
  background: rgba(57, 255, 20, .05);
  padding: 10px 12px;
  font-size: .82rem;
  margin-top: 12px;
  color: rgba(245, 247, 250, .85);
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: var(--space);
}

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

.grid-split {
  grid-template-columns: 1.15fr .85fr;
  gap: var(--space);
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space);
}

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

.span-2 { grid-column: span 2; }
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--c-dim);
  background: rgba(74, 100, 128, .1);
  border: 1px solid var(--c-line);
  white-space: nowrap;
}

.tag-live {
  color: var(--c-bg-deep);
  background: var(--c-accent);
  border-color: var(--c-accent);
}

.tag-hot {
  color: var(--c-bg-deep);
  background: var(--c-hot);
  border-color: var(--c-hot);
}

.tag-update {
  color: var(--c-hot);
  border-color: rgba(255, 106, 0, .5);
  background: rgba(255, 106, 0, .08);
}

/* ---------- 面包屑 ---------- */
.breadcrumb-wrap {
  padding-block: 14px;
  border-bottom: 1px solid rgba(30, 58, 95, .5);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--c-dim);
}

.breadcrumb a {
  color: var(--c-dim);
  transition: color .2s;
}

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

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--c-line);
}

.breadcrumb li[aria-current="page"] {
  color: var(--c-accent);
  font-weight: 700;
}

/* ---------- 数据表 ---------- */
.stat-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: .8rem;
}

.stat-table caption {
  caption-side: top;
  text-align: left;
  font-family: var(--font-body);
  font-size: .85rem;
  font-weight: 800;
  color: var(--c-text);
  padding-bottom: 8px;
}

.stat-table th {
  background: var(--c-bg-deep);
  color: var(--c-dim);
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--c-line);
  font-weight: 700;
  white-space: nowrap;
}

.stat-table td {
  padding: 9px 12px;
  border-bottom: 1px solid rgba(30, 58, 95, .55);
  color: var(--c-text);
}

.stat-table tbody tr {
  transition: background .15s;
}

.stat-table tbody tr:hover {
  background: rgba(57, 255, 20, .045);
}

.stat-highlight {
  color: var(--c-accent);
  font-weight: 700;
}

.stat-up { color: var(--c-pos); }
.stat-down { color: var(--c-neg); }

/* ---------- 图片占位容器 ---------- */
.figure {
  position: relative;
  overflow: hidden;
  background: var(--c-bg-deep);
  border: 1px solid var(--c-line);
}

.figure::before {
  content: "IMG";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .3em;
  color: var(--c-dim);
  opacity: .7;
  z-index: 0;
}

.figure::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  transition: border-color .3s;
  z-index: 2;
  pointer-events: none;
}

.figure:hover::after {
  border-color: rgba(57, 255, 20, .4);
}

.figure img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

.figure-21x9 { padding-bottom: 42.86%; }
.figure-16x9 { padding-bottom: 56.25%; }
.figure-4x3 { padding-bottom: 75%; }
.figure-3x2 { padding-bottom: 66.66%; }
.figure-1x1 { padding-bottom: 100%; }

/* ---------- 手风琴 ---------- */
.accordion {
  background: var(--c-glass);
  border: 1px solid var(--c-line);
  box-shadow: var(--shadow);
}

.accordion + .accordion {
  margin-top: 12px;
}

.accordion summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  font-family: var(--font-body);
  font-size: .92rem;
  font-weight: 800;
  color: var(--c-text);
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}

.accordion summary::-webkit-details-marker {
  display: none;
}

.accordion summary::before {
  content: "";
  width: 3px;
  height: 18px;
  background: var(--c-accent);
  flex-shrink: 0;
}

.accordion summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--c-accent);
  font-size: 1.1rem;
  line-height: 1;
  transition: transform .25s var(--ease);
}

.accordion[open] summary {
  border-bottom-color: var(--c-line);
  color: var(--c-accent);
}

.accordion[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.accordion-body {
  padding: 16px 20px;
  font-size: .88rem;
  color: rgba(245, 247, 250, .82);
}

/* ---------- 提示框 ---------- */
.callout {
  display: flex;
  gap: 14px;
  padding: 18px 20px;
  background: rgba(57, 255, 20, .05);
  border: 1px solid rgba(57, 255, 20, .3);
  border-left: 3px solid var(--c-accent);
  font-size: .88rem;
  color: rgba(245, 247, 250, .86);
}

.callout-warn {
  background: rgba(255, 106, 0, .06);
  border-color: rgba(255, 106, 0, .35);
  border-left-color: var(--c-hot);
}

.callout-info {
  background: rgba(74, 100, 128, .08);
  border-color: var(--c-line);
  border-left-color: var(--c-dim);
}

.callout-title {
  font-weight: 800;
  color: var(--c-text);
  margin-bottom: 4px;
}

/* ---------- 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transition-delay: var(--reveal-order, 0ms);
}

[data-reveal="left"] { transform: translateX(-24px); }
[data-reveal="right"] { transform: translateX(24px); }

[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: auto;
  background: var(--c-bg-deep);
  border-top: 1px solid var(--c-line);
  color: var(--c-dim);
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-hot) 0 16%, var(--c-line) 16% 78%, var(--c-accent) 78% 100%);
  pointer-events: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(4, 1fr);
  gap: 36px 32px;
  padding-block: 56px 44px;
}

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

.footer-logo {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 900;
  letter-spacing: .04em;
  color: var(--c-text);
  transition: color .2s;
}

.footer-logo em {
  font-family: var(--font-mono);
  font-style: normal;
  color: var(--c-accent);
  font-size: .48em;
  font-weight: 700;
}

.footer-logo:hover {
  color: var(--c-accent);
}

.footer-tagline {
  color: var(--c-accent);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .3em;
  text-indent: .3em;
  margin-top: 10px;
}

.footer-desc {
  max-width: 38em;
  margin-top: 14px;
  font-size: .82rem;
  line-height: 1.9;
  color: var(--c-dim);
}

.footer-brand .btn {
  margin-top: 18px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--c-text);
  text-transform: uppercase;
  padding-bottom: 10px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--c-line);
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-col a {
  display: inline-block;
  padding: 6px 0;
  color: var(--c-dim);
  font-size: .84rem;
  transition: color .2s, padding-left .2s;
}

.footer-col a:hover {
  color: var(--c-accent);
  padding-left: 6px;
}

.footer-contactbar {
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  background: rgba(11, 27, 43, .5);
}

.footer-contactbar-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  padding-block: 14px;
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--c-dim);
}

.footer-bottom {
  border-top: 1px solid rgba(30, 58, 95, .6);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  align-items: center;
  justify-content: space-between;
  padding-block: 22px;
  font-size: .75rem;
  color: var(--c-dim);
}

.footer-note {
  color: rgba(255, 106, 0, .85);
}

/* ---------- 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: var(--z-nav);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-bg-deep);
  color: var(--c-accent);
  border: 1px solid rgba(57, 255, 20, .45);
  cursor: pointer;
  font-size: 1.1rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  transition: opacity .3s, transform .3s, background .2s, border-color .2s, visibility 0s .3s;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity .3s, transform .3s, background .2s, border-color .2s, visibility 0s;
}

.back-to-top:hover {
  background: var(--c-accent);
  color: var(--c-bg-deep);
  border-color: var(--c-accent);
}

/* ---------- 工具类 ---------- */
.mono { font-family: var(--font-mono); }
.dim { color: var(--c-dim); }
.accent { color: var(--c-accent); }
.hot { color: var(--c-hot); }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--c-line);
    margin-bottom: 6px;
  }
}

@media (max-width: 1000px) {
  .grid-split { grid-template-columns: 1fr; }
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 920px) {
  .topbar-sync,
  .topbar-icp {
    display: none;
  }

  .nav-inner {
    flex-wrap: wrap;
    gap: 4px;
    padding-block: 6px;
  }

  .nav-toggle {
    display: inline-flex;
    order: 1;
  }

  .nav-live {
    position: static;
    transform: none;
    margin-left: auto;
    order: 2;
  }

  .nav-menu {
    display: none;
    order: 3;
    flex-basis: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 6px 0 10px;
    border-top: 1px solid var(--c-line);
  }

  .site-nav[data-open="true"] .nav-menu {
    display: flex;
  }

  .nav-link {
    height: 42px;
    justify-content: flex-start;
    padding-inline: 14px;
  }

  .nav-link::after {
    left: 0;
    right: auto;
    top: 6px;
    bottom: 6px;
    width: 2px;
    height: auto;
    transform: scaleY(0);
  }

  .nav-link:hover::after,
  .nav-link[aria-current="page"]::after {
    transform: scaleY(1);
  }

  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }

  .span-6,
  .span-8 { grid-column: span 6; }

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

@media (max-width: 620px) {
  .container {
    padding-inline: 16px;
  }

  .topbar-contact {
    display: none;
  }

  .topbar-inner {
    gap: 6px 12px;
  }

  .masthead-inner {
    padding-block: 24px 18px;
  }

  .masthead-meta {
    font-size: .58rem;
  }

  .brand-tagline {
    letter-spacing: .22em;
    text-indent: .22em;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-block: 44px 36px;
  }

  .footer-brand {
    grid-column: auto;
    border-bottom: 0;
  }

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 { grid-template-columns: 1fr; }

  .span-2,
  .span-3,
  .span-4,
  .span-6,
  .span-8,
  .span-12 { grid-column: span 12; }

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

/* ---------- 无障碍与减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}