/* ==========================================================================
   蓝图娱乐 LAN TU · BLUEPRINT AI — 工程蓝图视觉系统 v1.0
   设计语言: 蓝晒图纸 / 深墨蓝底 + 图纸网格 + 亮青墨线 + 工程标注橙
   布局: 左侧固定工程侧栏 + 右侧图纸内容区 (区别于常规顶部导航模板)
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  --ink: #05152a;            /* 图纸底 */
  --panel: #081d36;          /* 面板底 */
  --panel-2: #0a2444;        /* 高亮面板 */
  --grid: rgba(96, 165, 250, .07);
  --grid-2: rgba(96, 165, 250, .13);
  --line: rgba(96, 165, 250, .22);
  --line-2: rgba(96, 165, 250, .45);
  --cyan: #3cc8f2;
  --cyan-2: #8fe0ff;
  --cyan-dim: rgba(60, 200, 242, .12);
  --amber: #ffb454;
  --amber-dim: rgba(255, 180, 84, .14);
  --txt: #d9e9fb;
  --txt-2: #93b4d8;
  --mut: #5d7ea6;
  --mono: "Consolas", "SFMono-Regular", "JetBrains Mono", "Courier New", monospace;
  --disp: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --sbw: 268px;              /* 侧栏宽 */
}

/* ---------- 2. Reset & base ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--disp);
  font-size: 15px;
  line-height: 1.8;
  color: var(--txt);
  background-color: var(--ink);
  background-image:
    linear-gradient(var(--grid-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-2) 1px, transparent 1px),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 160px 160px, 160px 160px, 32px 32px, 32px 32px;
  min-height: 100vh;
}
a { color: var(--cyan); text-decoration: none; transition: color .2s; }
a:hover { color: var(--cyan-2); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
::selection { background: var(--cyan); color: #04121f; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: #14375f; border: 2px solid var(--ink); }

/* ---------- 3. 左侧工程侧栏 ---------- */
.sidebar {
  position: fixed; left: 0; top: 0; bottom: 0; width: var(--sbw);
  background: linear-gradient(180deg, #071a30 0%, #05152a 100%);
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column;
  z-index: 100; overflow-y: auto;
}
.sidebar::after {           /* 侧栏右缘刻度线 */
  content: ""; position: absolute; right: -1px; top: 0; bottom: 0; width: 1px;
  background-image: linear-gradient(var(--line-2) 1px, transparent 1px);
  background-size: 1px 12px; opacity: .5;
}
.sb-brand {
  display: flex; align-items: center; gap: 12px;
  padding: 26px 24px 22px; border-bottom: 1px dashed var(--line);
}
.sb-logo {
  width: 44px; height: 44px; flex: none; position: relative;
  border: 2px solid var(--cyan); display: grid; place-items: center;
  font-family: var(--mono); font-weight: 700; font-size: 20px; color: var(--cyan);
  letter-spacing: -1px;
}
.sb-logo::before {
  content: ""; position: absolute; right: -5px; top: -5px;
  width: 9px; height: 9px; background: var(--amber);
}
.sb-brand-name { line-height: 1.3; }
.sb-brand-name b { font-size: 18px; letter-spacing: 3px; color: #fff; display: block; }
.sb-brand-name small {
  font-family: var(--mono); font-size: 10px; letter-spacing: 2px;
  color: var(--mut); text-transform: uppercase;
}
.sb-meta {
  padding: 12px 24px; font-family: var(--mono); font-size: 10.5px;
  color: var(--mut); letter-spacing: 1px; border-bottom: 1px dashed var(--line);
  display: flex; justify-content: space-between;
}
.sb-meta .dot { color: #3ddc84; }
.sb-nav { padding: 14px 0; flex: 1; }
.sb-nav a {
  display: flex; align-items: center; gap: 14px;
  padding: 11px 24px; color: var(--txt-2); font-size: 14.5px;
  border-left: 3px solid transparent; position: relative;
}
.sb-nav a .sn-no {
  font-family: var(--mono); font-size: 10.5px; color: var(--mut);
  width: 24px; letter-spacing: .5px; transition: color .2s;
}
.sb-nav a:hover { color: #fff; background: rgba(60, 200, 242, .05); }
.sb-nav a:hover .sn-no { color: var(--cyan); }
.sb-nav a.active {
  color: #fff; background: linear-gradient(90deg, var(--cyan-dim), transparent);
  border-left-color: var(--cyan);
}
.sb-nav a.active .sn-no { color: var(--cyan); }
.sb-nav a.active::after {
  content: ""; position: absolute; right: 20px; width: 6px; height: 6px;
  background: var(--amber);
}
.sb-cta { padding: 18px 24px 8px; }
.sb-foot {
  padding: 18px 24px 22px; border-top: 1px dashed var(--line);
  font-family: var(--mono); font-size: 10.5px; color: var(--mut);
  letter-spacing: 1px; line-height: 2;
}
.sb-foot b { color: var(--cyan); font-weight: 600; }

/* 移动端顶栏（桌面隐藏） */
.mtop {
  display: none; position: sticky; top: 0; z-index: 90;
  background: rgba(5, 21, 42, .94); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  padding: 12px 18px; align-items: center; justify-content: space-between;
}
.mtop .sb-brand { padding: 0; border: 0; gap: 10px; }
.mtop .sb-logo { width: 34px; height: 34px; font-size: 16px; border-width: 1.5px; }
.mtop .sb-brand-name b { font-size: 15px; }
.mtop .sb-brand-name small { font-size: 8.5px; }
.mburger { background: none; border: 1px solid var(--line); width: 40px; height: 36px; cursor: pointer; padding: 8px; }
.mburger span { display: block; height: 2px; background: var(--cyan); margin: 4px 0; transition: .3s; }
.menu-open .mburger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-open .mburger span:nth-child(2) { opacity: 0; }
.menu-open .mburger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 4. 主内容区 ---------- */
.main { margin-left: var(--sbw); min-height: 100vh; position: relative; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 36px; }
.sec { padding: 76px 0; position: relative; }
.sec + .sec { padding-top: 0; }
.sec-line { border-top: 1px dashed var(--line); }

/* 面包屑 / 状态条 */
.crumbs {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 22px 0 0; font-family: var(--mono); font-size: 11.5px;
  color: var(--mut); letter-spacing: .5px;
}
.crumbs a { color: var(--txt-2); }
.crumbs a:hover { color: var(--cyan); }
.crumbs .sep { color: var(--line-2); }
.crumbs .cur { color: var(--amber); }

/* ---------- 5. 章节标题 / 通用组件 ---------- */
.sec-head { margin-bottom: 40px; position: relative; }
.sec-no {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 3px;
  color: var(--amber); display: inline-flex; align-items: center; gap: 12px;
  text-transform: uppercase; margin-bottom: 10px;
}
.sec-no::before { content: "▍"; color: var(--cyan); }
.sec-no::after {
  content: ""; width: 64px; height: 1px; background-image: linear-gradient(90deg, var(--line-2) 60%, transparent 60%);
  background-size: 8px 1px;
}
.sec-title { font-size: 30px; line-height: 1.35; color: #fff; letter-spacing: 1px; font-weight: 700; }
.sec-title em { font-style: normal; color: var(--cyan); }
.sec-sub { margin-top: 12px; color: var(--txt-2); max-width: 720px; font-size: 14.5px; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--disp); font-size: 14.5px; font-weight: 600; letter-spacing: 1px;
  padding: 13px 30px; border: 1px solid var(--cyan); color: var(--cyan);
  background: transparent; cursor: pointer; transition: all .25s; position: relative;
}
.btn::after { content: "→"; font-family: var(--mono); transition: transform .25s; }
.btn:hover { background: var(--cyan); color: #04121f; }
.btn:hover::after { transform: translateX(4px); }
.btn-amber { border-color: var(--amber); color: var(--amber); }
.btn-amber:hover { background: var(--amber); color: #1c1204; }
.btn-sm { padding: 9px 20px; font-size: 13px; }
.btn-block { width: 100%; }

/* 蓝图卡片：细边框 + 左上/右下角标 */
.bp-card {
  position: relative; background: linear-gradient(180deg, rgba(10, 36, 68, .55), rgba(8, 29, 54, .55));
  border: 1px solid var(--line); padding: 28px;
}
.bp-card::before, .bp-card::after {
  content: ""; position: absolute; width: 14px; height: 14px;
  border-color: var(--cyan); border-style: solid;
}
.bp-card::before { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.bp-card::after { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }
.bp-card:hover { border-color: var(--line-2); }
.bp-card.hoverable { transition: .3s; }
.bp-card.hoverable:hover { transform: translateY(-3px); background: linear-gradient(180deg, rgba(13, 44, 82, .7), rgba(8, 29, 54, .7)); }

/* 标签 / 徽章 */
.tag {
  display: inline-block; font-family: var(--mono); font-size: 10.5px; letter-spacing: 2px;
  color: var(--cyan); border: 1px solid var(--line-2); padding: 3px 10px;
  text-transform: uppercase; background: var(--cyan-dim);
}
.tag-amber { color: var(--amber); border-color: rgba(255, 180, 84, .5); background: var(--amber-dim); }
.tag-mut { color: var(--mut); border-color: var(--line); background: transparent; }

/* 数据表格 */
.bp-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.bp-table th, .bp-table td { border: 1px solid var(--line); padding: 11px 16px; text-align: left; }
.bp-table th {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 1px; color: var(--cyan);
  background: var(--cyan-dim); font-weight: 600; text-transform: uppercase;
}
.bp-table tr:hover td { background: rgba(60, 200, 242, .04); }

/* ---------- 6. 首页 Hero ---------- */
.hero { padding: 64px 0 60px; position: relative; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 54px; align-items: center; }
.hero-kicker {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 4px; color: var(--cyan);
  text-transform: uppercase; display: flex; align-items: center; gap: 14px; margin-bottom: 22px;
}
.hero-kicker::before { content: ""; width: 34px; height: 1px; background: var(--cyan); }
.hero h1 { font-size: 44px; line-height: 1.28; color: #fff; letter-spacing: 2px; font-weight: 800; }
.hero h1 .hl { color: var(--cyan); position: relative; }
.hero h1 .hl::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 4px; height: 8px;
  background: var(--cyan-dim); z-index: -1;
}
.hero-sub { margin: 22px 0 30px; color: var(--txt-2); font-size: 16px; max-width: 560px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-proof {
  margin-top: 36px; display: flex; gap: 0; border: 1px solid var(--line);
  background: rgba(8, 29, 54, .6); font-family: var(--mono);
}
.hero-proof .hp { flex: 1; padding: 14px 18px; border-right: 1px dashed var(--line); }
.hero-proof .hp:last-child { border-right: 0; }
.hero-proof .num { font-size: 20px; color: var(--cyan); font-weight: 700; letter-spacing: 1px; }
.hero-proof .num small { font-size: 11px; color: var(--mut); }
.hero-proof .lb { font-size: 10.5px; color: var(--mut); letter-spacing: 1.5px; margin-top: 2px; }
.hero-media { position: relative; }
.hero-media .frame {
  position: relative; border: 1px solid var(--line-2); padding: 10px;
  background: rgba(8, 29, 54, .5);
}
.hero-media .frame::before, .hero-media .frame::after {
  content: ""; position: absolute; width: 20px; height: 20px; border-color: var(--amber); border-style: solid;
}
.hero-media .frame::before { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.hero-media .frame::after { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }
.hero-media .shot { height: 420px; overflow: hidden; }
.hero-media img { width: 100%; height: calc(100% + 46px); object-fit: cover; object-position: 50% 0%; filter: saturate(1.05); }
.hero-media .fig {
  position: absolute; bottom: -12px; left: 26px; font-family: var(--mono);
  font-size: 10.5px; letter-spacing: 2px; color: var(--mut); background: var(--ink); padding: 3px 12px;
  border: 1px solid var(--line);
}

/* 数据统计带 */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border: 1px solid var(--line);
}
.stat { padding: 26px 24px; border-right: 1px dashed var(--line); position: relative; background: rgba(8, 29, 54, .45); }
.stat:last-child { border-right: 0; }
.stat::before { content: attr(data-no); position: absolute; top: 10px; right: 14px; font-family: var(--mono); font-size: 10px; color: var(--mut); letter-spacing: 1px; }
.stat-num { font-family: var(--mono); font-size: 32px; font-weight: 700; color: var(--cyan); line-height: 1.2; letter-spacing: 1px; }
.stat-num small { font-size: 14px; color: var(--txt-2); margin-left: 2px; }
.stat-label { color: var(--txt-2); font-size: 13px; margin-top: 6px; }

/* 技术卡网格 */
.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.tech-card .tc-icon {
  width: 46px; height: 46px; border: 1px solid var(--line-2); display: grid; place-items: center;
  margin-bottom: 18px; color: var(--cyan); font-family: var(--mono); font-size: 15px; font-weight: 700;
  position: relative;
}
.tech-card .tc-icon::after { content: ""; position: absolute; top: -1px; right: -1px; width: 8px; height: 8px; background: var(--amber); }
.tech-card h3 { color: #fff; font-size: 18px; margin-bottom: 10px; letter-spacing: 1px; }
.tech-card p { color: var(--txt-2); font-size: 13.5px; }
.tech-card .tc-meta {
  margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--line);
  font-family: var(--mono); font-size: 11px; color: var(--mut); letter-spacing: 1px;
  display: flex; justify-content: space-between;
}
.tech-card .tc-meta b { color: var(--amber); font-weight: 600; }

/* 流程步骤 */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; border: 1px solid var(--line); }
.flow-item { padding: 26px 22px; border-right: 1px dashed var(--line); position: relative; background: rgba(8, 29, 54, .4); }
.flow-item:last-child { border-right: 0; }
.flow-item::before {
  counter-increment: step; content: "0" counter(step);
  font-family: var(--mono); font-size: 30px; font-weight: 700; color: transparent;
  -webkit-text-stroke: 1px var(--line-2); display: block; margin-bottom: 12px; line-height: 1;
}
.flow-item h4 { color: #fff; font-size: 15.5px; margin-bottom: 8px; }
.flow-item p { color: var(--txt-2); font-size: 13px; }
.flow-item::after {
  content: "→"; position: absolute; right: -9px; top: 50%; transform: translateY(-50%);
  color: var(--cyan); font-family: var(--mono); background: var(--ink); padding: 2px 0; z-index: 2;
}
.flow-item:last-child::after { display: none; }

/* 产品/方案卡 */
.prod-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.prod-card { display: block; color: inherit; }
.prod-card .pc-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 16px; }
.prod-card h3 { color: #fff; font-size: 19px; letter-spacing: 1px; }
.prod-card h3 small { display: block; font-family: var(--mono); font-size: 10.5px; color: var(--mut); letter-spacing: 2px; margin-top: 4px; text-transform: uppercase; font-weight: 400; }
.prod-card p { color: var(--txt-2); font-size: 13.5px; margin-bottom: 16px; }
.prod-card .pc-specs { display: flex; flex-wrap: wrap; gap: 8px; }
.prod-card:hover h3 { color: var(--cyan); }

/* 文章卡 */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.ncard { display: flex; flex-direction: column; color: inherit; }
.ncard .nc-cover { height: 150px; overflow: hidden; margin: -28px -28px 20px; border-bottom: 1px solid var(--line); position: relative; }
.ncard .nc-cover img { width: 100%; height: calc(100% + 30px); object-fit: cover; object-position: 50% 0%; transition: transform .5s; }
.ncard:hover .nc-cover img { transform: scale(1.04); }
.ncard .nc-date { font-family: var(--mono); font-size: 10.5px; color: var(--amber); letter-spacing: 1.5px; margin-bottom: 10px; }
.ncard h3 { font-size: 16px; color: #fff; line-height: 1.55; margin-bottom: 10px; }
.ncard:hover h3 { color: var(--cyan); }
.ncard p { color: var(--txt-2); font-size: 13px; flex: 1; }
.ncard .nc-foot { margin-top: 16px; padding-top: 12px; border-top: 1px dashed var(--line); font-family: var(--mono); font-size: 10.5px; color: var(--mut); letter-spacing: 1px; display: flex; justify-content: space-between; }

/* 横向文章条目（news 列表页） */
.nrow { display: flex; gap: 26px; align-items: flex-start; padding: 26px 0; border-bottom: 1px dashed var(--line); }
.nrow:first-of-type { padding-top: 8px; }
.nrow .nr-date {
  flex: none; width: 92px; font-family: var(--mono); color: var(--amber); font-size: 12px;
  letter-spacing: 1px; padding-top: 4px;
}
.nrow .nr-date small { display: block; color: var(--mut); font-size: 10px; margin-top: 4px; }
.nrow .nr-body { flex: 1; }
.nrow h3 { font-size: 17.5px; line-height: 1.55; margin-bottom: 8px; }
.nrow h3 a { color: #fff; }
.nrow h3 a:hover { color: var(--cyan); }
.nrow p { color: var(--txt-2); font-size: 13.5px; }
.nrow .nr-tags { margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }

/* CTA 带 */
.cta-band {
  border: 1px solid var(--line-2); background: linear-gradient(120deg, rgba(10, 36, 68, .9), rgba(5, 21, 42, .9));
  padding: 46px 48px; display: flex; align-items: center; justify-content: space-between; gap: 30px;
  position: relative; overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; right: -60px; top: -60px; width: 220px; height: 220px;
  border: 1px dashed var(--line-2); border-radius: 50%;
}
.cta-band::after {
  content: ""; position: absolute; right: 20px; top: 20px; width: 120px; height: 120px;
  border: 1px dashed var(--line); transform: rotate(45deg);
}
.cta-band h2 { color: #fff; font-size: 25px; letter-spacing: 1px; margin-bottom: 8px; }
.cta-band p { color: var(--txt-2); font-size: 14px; }
.cta-band .btn { flex: none; position: relative; z-index: 1; }

/* ---------- 7. 内页 ---------- */
.page-hero { padding: 46px 0 50px; position: relative; border-bottom: 1px dashed var(--line); }
.page-hero .ph-no {
  font-family: var(--mono); font-size: 60px; font-weight: 700; color: transparent;
  -webkit-text-stroke: 1px var(--line-2); line-height: 1; margin-bottom: 18px; letter-spacing: 3px;
}
.page-hero h1 { font-size: 34px; color: #fff; letter-spacing: 2px; line-height: 1.35; }
.page-hero h1 em { font-style: normal; color: var(--cyan); }
.page-hero .ph-sub { margin-top: 14px; color: var(--txt-2); max-width: 760px; }

/* 文章正文 */
.post-wrap { max-width: 860px; }
.post-head { margin-bottom: 30px; padding-bottom: 24px; border-bottom: 1px dashed var(--line); }
.post-head h1 { font-size: 30px; line-height: 1.45; color: #fff; letter-spacing: 1px; margin-bottom: 18px; }
.post-meta { display: flex; flex-wrap: wrap; gap: 8px 26px; font-family: var(--mono); font-size: 12px; color: var(--mut); letter-spacing: .5px; }
.post-meta b { color: var(--cyan); font-weight: 600; }
.post-body { font-size: 15.5px; color: var(--txt); }
.post-body p { margin-bottom: 20px; }
.post-body h2 {
  font-size: 21px; color: #fff; margin: 38px 0 16px; padding-left: 16px;
  border-left: 3px solid var(--cyan); line-height: 1.5; letter-spacing: 1px;
}
.post-body a { border-bottom: 1px dashed var(--cyan); }
.post-body strong { color: var(--cyan-2); }
.post-table { width: 100%; border-collapse: collapse; margin: 26px 0; font-size: 14px; }
.post-table th, .post-table td { border: 1px solid var(--line); padding: 10px 16px; text-align: left; }
.post-table th { background: var(--cyan-dim); color: var(--cyan); font-family: var(--mono); font-size: 12px; letter-spacing: 1px; }
.post-quote {
  border: 1px dashed var(--line-2); border-left: 3px solid var(--amber);
  padding: 20px 24px; margin: 26px 0; color: var(--txt-2); font-size: 14.5px;
  background: rgba(255, 180, 84, .05);
}
.post-cover, .figure { margin: 0 0 32px; border: 1px solid var(--line); padding: 8px; background: rgba(8, 29, 54, .5); }
.post-cover .shot, .figure .shot { height: 340px; overflow: hidden; }
.post-cover img, .figure img { width: 100%; height: calc(100% + 44px); object-fit: cover; object-position: 50% 0%; }
.post-cover figcaption, .figure figcaption { font-family: var(--mono); font-size: 10.5px; color: var(--mut); letter-spacing: 1px; padding-top: 8px; }
.figure.tall .shot { height: 460px; }
.post-tags { margin: 34px 0 0; padding-top: 22px; border-top: 1px dashed var(--line); display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.post-tags .pt-label { font-family: var(--mono); font-size: 11.5px; color: var(--mut); letter-spacing: 1px; }
.post-tags a { font-size: 12.5px; color: var(--txt-2); border: 1px solid var(--line); padding: 4px 14px; }
.post-tags a:hover { color: var(--cyan); border-color: var(--line-2); }
.post-nav { display: flex; justify-content: space-between; gap: 18px; margin-top: 26px; flex-wrap: wrap; }
.rels { margin-top: 40px; }
.rels h2 { font-size: 18px; color: #fff; margin-bottom: 16px; padding-left: 14px; border-left: 3px solid var(--amber); }
.rel-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.rel-list a {
  display: block; border: 1px solid var(--line); padding: 16px 18px; color: var(--txt-2); font-size: 13px;
  transition: .25s; background: rgba(8, 29, 54, .45);
}
.rel-list a b { display: block; color: var(--txt); font-size: 14px; margin-bottom: 6px; line-height: 1.5; }
.rel-list a:hover { border-color: var(--line-2); transform: translateY(-2px); }
.rel-list a:hover b { color: var(--cyan); }

/* FAQ 手风琴 (details) */
.faq-list { display: grid; gap: 14px; }
.faq-list details { border: 1px solid var(--line); background: rgba(8, 29, 54, .5); }
.faq-list details[open] { border-color: var(--line-2); }
.faq-list summary {
  cursor: pointer; padding: 18px 24px 18px 56px; font-size: 15.5px; color: #fff;
  list-style: none; position: relative; font-weight: 600;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::before {
  content: "Q"; position: absolute; left: 20px; top: 18px; font-family: var(--mono);
  width: 22px; height: 22px; display: grid; place-items: center; font-size: 11px;
  border: 1px solid var(--cyan); color: var(--cyan); font-weight: 700;
}
.faq-list summary::after {
  content: "+"; position: absolute; right: 22px; top: 50%; transform: translateY(-50%);
  font-family: var(--mono); color: var(--cyan); font-size: 18px; transition: .25s;
}
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-list .faq-a { padding: 0 24px 22px 56px; color: var(--txt-2); font-size: 14px; border-top: 1px dashed var(--line); padding-top: 16px; margin: 0 24px 22px 0; }

/* 关于页时间线 */
.timeline { border-left: 1px dashed var(--line-2); margin-left: 10px; padding-left: 34px; display: grid; gap: 34px; }
.tl-item { position: relative; }
.tl-item::before {
  content: ""; position: absolute; left: -40px; top: 8px; width: 11px; height: 11px;
  border: 2px solid var(--cyan); background: var(--ink);
}
.tl-item .tl-year { font-family: var(--mono); color: var(--amber); font-size: 13px; letter-spacing: 2px; margin-bottom: 6px; }
.tl-item h3 { color: #fff; font-size: 17px; margin-bottom: 8px; }
.tl-item p { color: var(--txt-2); font-size: 13.5px; }

/* 荣誉/数字卡 */
.honor-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.honor { border: 1px solid var(--line); padding: 22px; background: rgba(8, 29, 54, .45); }
.honor .h-no { font-family: var(--mono); color: var(--mut); font-size: 10.5px; letter-spacing: 2px; margin-bottom: 10px; }
.honor h4 { color: #fff; font-size: 15px; margin-bottom: 6px; }
.honor p { color: var(--txt-2); font-size: 12.5px; }

/* 联系页 */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 26px; align-items: start; }
.info-item { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px dashed var(--line); }
.info-item .ii-k {
  flex: none; width: 44px; height: 44px; border: 1px solid var(--line-2); display: grid; place-items: center;
  font-family: var(--mono); color: var(--cyan); font-size: 12px;
}
.info-item h4 { color: #fff; font-size: 14.5px; margin-bottom: 4px; }
.info-item p { color: var(--txt-2); font-size: 13.5px; }
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-family: var(--mono); font-size: 11.5px; color: var(--cyan); letter-spacing: 1px; margin-bottom: 8px; text-transform: uppercase; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; background: rgba(5, 21, 42, .8); border: 1px solid var(--line);
  color: var(--txt); padding: 12px 16px; font-family: var(--disp); font-size: 14px; outline: none; transition: .2s;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus { border-color: var(--cyan); }
.form-row textarea { resize: vertical; min-height: 120px; }

/* 文章列表页工具条 */
.list-tools { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 10px; }
.list-tools .lt-count { font-family: var(--mono); font-size: 12px; color: var(--mut); letter-spacing: 1px; }
.list-tools .lt-count b { color: var(--cyan); }
.filter-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-tags a { font-size: 12.5px; padding: 5px 14px; border: 1px solid var(--line); color: var(--txt-2); }
.filter-tags a.on, .filter-tags a:hover { border-color: var(--cyan); color: var(--cyan); background: var(--cyan-dim); }

/* ---------- 8. 页脚（图纸标题栏） ---------- */
.footer { border-top: 1px solid var(--line); background: rgba(5, 21, 42, .85); margin-top: 80px; }
.tb-block { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; border: 1px solid var(--line); border-top: 0; }
.tb-cell { padding: 20px 22px; border-right: 1px dashed var(--line); }
.tb-cell:last-child { border-right: 0; }
.tb-cell .tbc-k { font-family: var(--mono); font-size: 10px; letter-spacing: 2px; color: var(--mut); text-transform: uppercase; margin-bottom: 8px; }
.tb-cell .tbc-v { font-size: 13.5px; color: var(--txt-2); }
.tb-cell .tbc-v b { color: var(--cyan); }
.footer-main { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; padding: 44px 0 34px; }
.footer-main h4 { font-family: var(--mono); font-size: 11.5px; letter-spacing: 2px; color: var(--cyan); margin-bottom: 16px; text-transform: uppercase; }
.footer-main p { color: var(--txt-2); font-size: 13px; margin-bottom: 8px; }
.footer-main a { display: block; color: var(--txt-2); font-size: 13.5px; padding: 4px 0; }
.footer-main a:hover { color: var(--cyan); padding-left: 4px; }
.footer-brand .fb-name { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-brand .fb-name b { color: #fff; font-size: 17px; letter-spacing: 2px; }
.footer-bottom {
  border-top: 1px dashed var(--line); padding: 18px 0 26px; display: flex;
  justify-content: space-between; gap: 14px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11px; color: var(--mut); letter-spacing: .5px;
}

/* ---------- 9. 动效 & 响应式 ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-media .shot { height: 300px; }
  .figure .shot, .post-cover .shot { height: 250px; }
  .tech-grid, .news-grid, .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .flow-item:nth-child(2)::after { display: none; }
  .tb-block, .footer-main { grid-template-columns: 1fr 1fr; }
  .tb-cell:nth-child(2) { border-right: 0; }
}

@media (max-width: 880px) {
  .sidebar { transform: translateX(-100%); transition: transform .3s; box-shadow: 0 0 60px rgba(0,0,0,.6); }
  .menu-open .sidebar { transform: none; }
  .mtop { display: flex; }
  .main { margin-left: 0; }
  .wrap { padding: 0 20px; }
  .sec { padding: 52px 0; }
  .hero { padding: 40px 0; }
  .hero h1 { font-size: 31px; }
  .hero-proof { flex-direction: column; }
  .hero-proof .hp { border-right: 0; border-bottom: 1px dashed var(--line); }
  .hero-proof .hp:last-child { border-bottom: 0; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { border-bottom: 1px dashed var(--line); }
  .stat:nth-child(even) { border-right: 0; }
  .stat:nth-child(n+3) { border-bottom: 0; }
  .tech-grid, .news-grid, .prod-grid, .honor-grid, .rel-list { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .flow-item { border-right: 0; border-bottom: 1px dashed var(--line); }
  .flow-item:last-child { border-bottom: 0; }
  .flow-item::after { display: none; }
  .cta-band { flex-direction: column; text-align: center; padding: 36px 24px; }
  .contact-grid { grid-template-columns: 1fr; }
  .tb-block, .footer-main { grid-template-columns: 1fr; }
  .tb-cell { border-right: 0; border-bottom: 1px dashed var(--line); }
  .tb-cell:last-child { border-bottom: 0; }
  .nrow { flex-direction: column; gap: 8px; }
  .nrow .nr-date { width: auto; padding-top: 0; }
  .page-hero h1 { font-size: 26px; }
  .sec-title { font-size: 24px; }
  .post-head h1 { font-size: 23px; }
  .post-body h2 { font-size: 18.5px; }
  .post-wrap { max-width: 100%; }
}