/* ==========================================================================
   炒菜机器人网 · 新版首页样式（方案 H2 · DESIGN v3.1）
   从空白样式表开始：本文件独立承载新版首页全部样式（含页眉/页脚），
   不引用、不覆盖旧版 site.css。旧页面继续使用 site.css，直至全站迁移完成。
   设计规范见 DESIGN.md：真白纸底、门户红 #d71920、墨黑 #17212b、单一黑体栈、
   一屏 3 档字号（30/15/13）、红杠章节标题、页眉与 1200px 内容容器对齐。
   ========================================================================== */

:root {
  /* 色板 */
  --hv2-paper: #ffffff;
  --hv2-soft: #f4f6f8;
  --hv2-ink: #1a1c1f;
  --hv2-body: #26282c;
  --hv2-secondary: #53606c;
  --hv2-muted: #697581;
  --hv2-faint: #8c8f94;
  --hv2-line: #dfe3e8;
  --hv2-line-dark: #c8cfd7;
  --hv2-navy: #17212b;
  --hv2-navy-2: #263542;
  --hv2-red: #d71920;
  --hv2-red-dark: #b9151b;
  --hv2-focus: rgb(230 0 18 / 26%);
  /* 字族（黑体栈 + 数据读数 mono，全站仅此两族） */
  --hv2-sans: "PingFang SC", "Source Han Sans CN", "Microsoft YaHei UI", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  --hv2-mono: "JetBrains Mono", "Cascadia Mono", Consolas, "Courier New", monospace;
  /* 三级字号阶梯（一屏 ≤3 档；层级靠字重与颜色区分） */
  --fs-display: 30px;
  --fs-title: 15px;
  --fs-body: 13px;
}

* { box-sizing: border-box; }

body.home-h2-page {
  margin: 0;
  background: var(--hv2-paper);
  color: var(--hv2-body);
  font: var(--fs-body) / 1.65 var(--hv2-sans);
  -webkit-font-smoothing: antialiased;
}

.home-h2-page h1, .home-h2-page h2, .home-h2-page h3 { color: var(--hv2-ink); margin: 0; }
.home-h2-page img { max-width: 100%; height: auto; display: block; }
.home-h2-page a { color: var(--hv2-ink); text-decoration: none; }
.home-h2-page a:hover { color: var(--hv2-red); }
.home-h2-page button { font-family: inherit; cursor: pointer; }
.home-h2-page :focus-visible { outline: 2px solid var(--hv2-focus); outline-offset: 2px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px;
  clip: rect(0 0 0 0); clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

.skip-link {
  position: absolute; left: 16px; top: -48px; z-index: 60;
  background: var(--hv2-red); color: #fff; padding: 8px 14px; font-size: var(--fs-body);
  transition: top 0.15s ease;
}
.skip-link:focus { top: 8px; color: #fff; }

.hv2-wrap { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* 红杠章节标题（签名组件） */
.hv2-sec-title {
  display: flex; align-items: center; gap: 9px;
  font-size: var(--fs-title); font-weight: 700; line-height: 1.35; color: var(--hv2-ink);
}
.hv2-sec-title::before {
  content: ""; width: 4px; height: 1.05em; background: var(--hv2-red); flex: none;
}

/* ---------- 页眉（纯白；与下方 1200px 内容容器对齐） ---------- */
.site-header { background: var(--hv2-paper); border-bottom: 1px solid var(--hv2-line); }
.site-header__inner {
  max-width: 1200px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; gap: 28px; height: 60px;
}
.brand { display: flex; align-items: center; gap: 10px; font-size: var(--fs-title); font-weight: 700; }
.brand__mark img { display: block; border-radius: 6px; }
.main-nav { display: flex; gap: 4px; }
.main-nav a { padding: 6px 12px; font-size: var(--fs-body); color: var(--hv2-secondary); }
.main-nav a:hover { color: var(--hv2-ink); }
.main-nav a[aria-current="page"] {
  color: var(--hv2-ink); font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--hv2-red);
}
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.site-search-form {
  display: flex; align-items: center; border: 1px solid var(--hv2-line-dark);
  border-radius: 999px; background: var(--hv2-paper); padding: 2px 4px 2px 14px;
}
.site-search-form input {
  border: 0; background: transparent; outline: none; width: 150px;
  font-size: var(--fs-body); color: var(--hv2-ink);
}
.site-search-form button {
  border: 0; background: var(--hv2-red); color: #fff; border-radius: 999px;
  width: 28px; height: 28px; display: flex; align-items: center; justify-content: center;
}
.site-search-form button:hover { background: var(--hv2-red-dark); }
.header-cooperation-link {
  background: var(--hv2-red); color: #fff !important; font-size: var(--fs-body); font-weight: 700;
  padding: 8px 16px; border-radius: 0.35rem;
}
.header-cooperation-link:hover { background: var(--hv2-red-dark); }
.menu-toggle {
  display: none; border: 1px solid var(--hv2-line-dark); background: var(--hv2-paper);
  width: 38px; height: 38px; border-radius: 0.35rem; position: relative;
}
.menu-toggle span[aria-hidden="true"],
.menu-toggle span[aria-hidden="true"]::before,
.menu-toggle span[aria-hidden="true"]::after {
  content: ""; position: absolute; left: 9px; right: 9px; height: 2px; background: var(--hv2-ink);
}
.menu-toggle span[aria-hidden="true"] { top: 18px; }
.menu-toggle span[aria-hidden="true"]::before { top: -6px; left: 0; right: 0; }
.menu-toggle span[aria-hidden="true"]::after { top: 6px; left: 0; right: 0; }

/* ---------- 顶部运营栏（墨黑） ---------- */
.site-utility-bar { background: var(--hv2-navy); color: #c8cdd2; font-size: var(--fs-body); }
.site-utility-bar .shell {
  max-width: 1200px; margin: 0 auto; padding: 7px 20px;
  display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: center;
}
.site-utility-bar a { color: #e8e9ec; border-bottom: 1px solid #6d747d; }
.site-utility-bar a:hover { color: #fff; }
.site-utility-bar__stats { margin-left: auto; font-family: var(--hv2-mono); color: #9aa1a9; }

/* ---------- 身份区 + 找问题（两栏：检索 + 今日主推问题） ---------- */
.hv2-identity { padding: 40px 0 32px; border-bottom: 1px solid var(--hv2-line); }
.hv2-identity-grid { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 56px; align-items: start; }
.hv2-identity h1 { font-size: var(--fs-display); font-weight: 700; line-height: 1.3; }
.hv2-sub { color: var(--hv2-muted); margin: 10px 0 20px; max-width: 640px; }
.hv2-findq { display: flex; max-width: 720px; }
.hv2-findq input {
  flex: 1; border: 1px solid var(--hv2-line-dark); border-right: 0; outline: none;
  border-radius: 0.35rem 0 0 0.35rem;
  padding: 12px 16px; font-size: var(--fs-body); color: var(--hv2-ink); min-width: 0;
}
.hv2-findq input:focus { border-color: var(--hv2-red); box-shadow: 0 0 0 3px var(--hv2-focus); }
.hv2-findq button {
  border: 0; border-radius: 0 0.35rem 0.35rem 0; background: var(--hv2-red); color: #fff;
  padding: 0 28px; font-size: var(--fs-body); font-weight: 700;
}
.hv2-findq button:hover { background: var(--hv2-red-dark); }
.hv2-findq-hint { margin: 8px 2px 0; color: var(--hv2-muted); min-height: 20px; }
.hv2-try { margin: 6px 0 0; color: var(--hv2-faint); display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.hv2-try button {
  border: 1px solid var(--hv2-line-dark); border-radius: 999px; background: #fff;
  padding: 5px 12px; font-size: var(--fs-body); color: var(--hv2-secondary); cursor: pointer;
}
.hv2-try button:hover { border-color: var(--hv2-red); color: var(--hv2-red); }
.hv2-lead {
  border-top: 3px solid var(--hv2-red);
  padding: 14px 0 0;
}
.hv2-lead-kicker { color: var(--hv2-red); font-weight: 700; margin: 0 0 8px; }
.hv2-lead-title { font-size: var(--fs-title); font-weight: 700; line-height: 1.45; margin: 0 0 10px; color: var(--hv2-ink); }
.hv2-lead-ans { color: var(--hv2-secondary); margin: 0 0 12px; }
.hv2-lead-go { color: var(--hv2-red); font-weight: 700; text-decoration: none; }
.hv2-lead-go:hover { text-decoration: underline; }

/* ---------- 问题门户三栏 ---------- */
.hv2-portal {
  display: grid; grid-template-columns: 220px minmax(0, 1fr) 300px;
  border-bottom: 1px solid var(--hv2-line-dark);
}
.hv2-toc { padding: 26px 22px 26px 0; border-right: 1px solid var(--hv2-line); align-self: start; position: sticky; top: 16px; }
.hv2-toc h3 { color: var(--hv2-faint); margin: 0 0 8px; font-size: var(--fs-body); font-weight: 600; }
.hv2-toc h3 + ul { margin-bottom: 24px; }
.hv2-toc ul { list-style: none; margin: 0; padding: 0; }
.hv2-toc li a { display: block; padding: 7px 0 7px 14px; color: var(--hv2-secondary); border-left: 2px solid var(--hv2-line); }
.hv2-toc li a:hover { border-left-color: var(--hv2-line-dark); color: var(--hv2-ink); }
.hv2-toc li a.is-on { border-left-color: var(--hv2-red); color: var(--hv2-ink); font-weight: 700; }
.hv2-toc-cnt { font-family: var(--hv2-mono); color: var(--hv2-faint); margin-left: 8px; }

.hv2-main { padding: 26px 34px 10px; min-width: 0; }
.hv2-cluster { margin-bottom: 34px; }
.hv2-cluster:last-of-type { margin-bottom: 14px; }
.hv2-cluster-head {
  display: flex; align-items: baseline; gap: 12px;
  border-bottom: 1px solid var(--hv2-line-dark); padding-bottom: 9px; margin-bottom: 2px;
}
.hv2-cluster-no { font-family: var(--hv2-mono); font-size: var(--fs-title); font-weight: 800; color: var(--hv2-red); }
.hv2-cluster-meta { margin-left: auto; color: var(--hv2-muted); }
.hv2-cluster-head { flex-wrap: wrap; }
.hv2-cluster-meta { max-width: 100%; }

.hv2-updates { padding-top: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--hv2-line); }
.hv2-updates-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 18px; margin-bottom: 10px; }
.hv2-updates h2 { font-size: var(--fs-title); }
.hv2-updates-head span, .hv2-updates li span { color: var(--hv2-muted); }
.hv2-updates ul { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: 14px 24px; list-style: none; padding: 0; }
.hv2-updates li { display: grid; gap: 4px; }
.hv2-updates a { color: var(--hv2-red); font-weight: 700; }
.hv2-updates a:hover { text-decoration: underline; }

.hv2-q { display: grid; grid-template-columns: 34px 1fr; gap: 14px; padding: 15px 6px; border-bottom: 1px solid var(--hv2-line); }
.hv2-q:hover { background: var(--hv2-soft); }
.hv2-q-no { font-family: var(--hv2-mono); font-weight: 800; color: var(--hv2-red); padding-top: 2px; }
.hv2-q h3 { font-size: var(--fs-title); font-weight: 700; display: inline; }
.hv2-q-ans { margin: 5px 0 0; color: var(--hv2-secondary); }
.hv2-q-meta { margin: 7px 0 0; color: var(--hv2-muted); display: flex; gap: 14px; flex-wrap: wrap; }
.hv2-q-meta a { color: var(--hv2-muted); border-bottom: 1px solid var(--hv2-line-dark); }
.hv2-q-meta a:hover { color: var(--hv2-red); border-bottom-color: var(--hv2-red); }
.hv2-q-go { color: var(--hv2-ink) !important; font-weight: 600; border-bottom-color: var(--hv2-ink) !important; }
.hv2-q-go:hover { color: var(--hv2-red) !important; border-bottom-color: var(--hv2-red) !important; }
.hv2-q[hidden] { display: none; }
.hv2-cluster.is-filtered-out { display: none; }
.hv2-q-empty { padding: 28px 6px; color: var(--hv2-muted); }
.hv2-q-empty a { border-bottom: 1px solid var(--hv2-line-dark); }

/* ---------- 右栏 ---------- */
.hv2-rail { padding: 26px 0 26px 24px; border-left: 1px solid var(--hv2-line); }

/* 资讯图片轮换 */
.hv2-rail-gallery {
  position: relative; margin-bottom: 24px;
  border: 1px solid var(--hv2-line); border-radius: 0.5rem; overflow: hidden;
  background: var(--hv2-soft);
}
.hv2-rail-gallery-item {
  display: block; opacity: 0; visibility: hidden; position: absolute; inset: 0;
  transition: opacity 0.5s ease, visibility 0.5s;
}
.hv2-rail-gallery-item.is-active { opacity: 1; visibility: visible; position: relative; }
.hv2-rail-gallery-item img { width: 100%; aspect-ratio: 5 / 3; object-fit: cover; }
.hv2-rail-gallery-cap {
  display: block; background: var(--hv2-navy); color: #fff; padding: 10px 14px 12px;
}
.hv2-rail-gallery-cap small { display: block; color: #9aa1a9; font-family: var(--hv2-mono); margin-bottom: 3px; }
.hv2-rail-gallery-cap b {
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  font-size: var(--fs-body); font-weight: 700; line-height: 1.5;
}
.hv2-rail-gallery-dots {
  position: absolute; top: 8px; right: 10px; z-index: 2; display: flex; gap: 6px;
}
.hv2-rail-gallery-dots button {
  width: 8px; height: 8px; border: 0; border-radius: 50%;
  background: rgb(255 255 255 / 55%); padding: 0;
}
.hv2-rail-gallery-dots button.is-on { background: var(--hv2-red); }

.hv2-rail-upd { margin-bottom: 22px; }
.hv2-rail-upd-head { display: flex; align-items: baseline; margin-bottom: 2px; }
.hv2-rail-upd-head b { font-size: var(--fs-title); font-weight: 700; color: var(--hv2-ink); }
.hv2-rail-upd-head a { margin-left: auto; color: var(--hv2-muted); }
.hv2-rail-upd-sub { color: var(--hv2-faint); margin: 0 0 6px; }
.hv2-rail-upd ul { list-style: none; margin: 0; padding: 0; }
.hv2-rail-upd li { padding: 9px 0; border-bottom: 1px solid var(--hv2-line); line-height: 1.55; }
.hv2-rail-upd time { display: block; font-family: var(--hv2-mono); color: var(--hv2-faint); margin-top: 3px; }
.hv2-cat {
  display: inline-block; color: var(--hv2-muted);
  border: 1px solid var(--hv2-line-dark); border-radius: 0.35rem; padding: 0 5px; margin-right: 7px;
}

.hv2-std {
  border: 1px solid var(--hv2-line); border-radius: 0.5rem;
  background: var(--hv2-soft); padding: 16px 18px; margin-bottom: 18px;
}
.hv2-std > b { color: var(--hv2-muted); font-weight: 600; }
.hv2-std-name { color: var(--hv2-ink); margin: 6px 0 0; font-weight: 600; }
.hv2-std-days { margin: 6px 0 2px; color: var(--hv2-secondary); }
.hv2-std-days strong { font: 700 var(--fs-display) var(--hv2-mono); color: var(--hv2-red); margin-right: 4px; }
.hv2-std-note { color: var(--hv2-muted); margin: 0 0 8px; }
.hv2-std a { font-weight: 600; border-bottom: 1px solid var(--hv2-ink); }
.hv2-std a:hover { color: var(--hv2-red); border-bottom-color: var(--hv2-red); }

.hv2-selector-mini {
  border: 2px solid var(--hv2-navy); border-radius: 0.5rem; background: var(--hv2-paper);
  padding: 16px 18px; margin-bottom: 18px; display: block;
}
.hv2-selector-mini b { font-size: var(--fs-title); font-weight: 700; color: var(--hv2-ink); }
.hv2-selector-mini textarea {
  width: 100%; margin: 10px 0; border: 1px solid var(--hv2-line-dark); border-radius: 0.35rem;
  background: var(--hv2-paper); padding: 9px 12px; font: var(--fs-body) / 1.6 var(--hv2-sans);
  color: var(--hv2-ink); resize: vertical;
}
.hv2-selector-mini textarea:focus { border-color: var(--hv2-red); box-shadow: 0 0 0 3px var(--hv2-focus); outline: none; }
.hv2-selector-mini button {
  display: block; width: 100%; border: 0; border-radius: 0.35rem;
  background: var(--hv2-red); color: #fff; padding: 10px; font-weight: 700;
}
.hv2-selector-mini button:hover { background: var(--hv2-red-dark); }

.hv2-rail-anchor {
  display: block; border: 1.5px dashed var(--hv2-line-dark); border-radius: 0.5rem;
  padding: 13px 16px; color: var(--hv2-secondary); background: var(--hv2-paper);
}
.hv2-rail-anchor b { display: block; font-weight: 700; color: var(--hv2-ink); margin-bottom: 2px; }
.hv2-rail-anchor:hover { border-color: var(--hv2-red); }

/* ---------- 常见型号对比带 ---------- */
.hv2-band { padding: 34px 0 30px; background: var(--hv2-soft); border-bottom: 1px solid var(--hv2-line); }
.hv2-band-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 16px; flex-wrap: wrap; }
.hv2-band-sub { color: var(--hv2-muted); }
.hv2-band-head a { margin-left: auto; border-bottom: 1px solid var(--hv2-line-dark); }

.hv2-cmpx-wrap { position: relative; overflow-x: auto; }
.hv2-cmpx {
  width: 100%; min-width: 720px; border-collapse: collapse; background: var(--hv2-paper);
  table-layout: fixed;
}
.hv2-cmpx th, .hv2-cmpx td {
  border: 1px solid var(--hv2-line-dark); padding: 12px 14px;
  text-align: left; vertical-align: top; font-weight: 400;
}
.hv2-cmpx thead th { background: var(--hv2-soft); }
.hv2-cmp-dim { width: 128px; background: var(--hv2-soft) !important; color: var(--hv2-ink); font-weight: 700 !important; }
.hv2-cmp-dim small { display: block; font-weight: 400; color: var(--hv2-faint); margin-top: 3px; }

.hv2-cmp-dev { position: relative; background: var(--hv2-paper) !important; }
.hv2-cmp-x {
  position: absolute; top: 6px; right: 6px; width: 24px; height: 24px;
  border: 1px solid var(--hv2-line-dark); border-radius: 50%; background: var(--hv2-paper);
  color: var(--hv2-muted); line-height: 1;
}
.hv2-cmp-x:hover { border-color: var(--hv2-red); color: var(--hv2-red); }
.hv2-cmp-id { display: block; }
.hv2-cmp-id img { width: 96px; height: 66px; object-fit: cover; border-radius: 0.35rem; border: 1px solid var(--hv2-line); margin-bottom: 9px; background: var(--hv2-soft); }
.hv2-cmp-id strong { display: block; font-size: var(--fs-title); font-weight: 700; color: var(--hv2-ink); }
.hv2-cmp-id small { color: var(--hv2-muted); }
.hv2-cmpx td small { display: block; color: var(--hv2-faint); margin-top: 4px; }
.hv2-cmpx td.is-pending { color: var(--hv2-faint); }

.hv2-cmp-add { background: var(--hv2-paper) !important; border: 1.5px dashed var(--hv2-line-dark) !important; text-align: center; vertical-align: middle; }
.hv2-cmp-add button { border: 0; background: none; color: var(--hv2-muted); padding: 18px 8px; width: 100%; }
.hv2-cmp-add button:hover { color: var(--hv2-red); }
.hv2-cmp-plus { display: block; font-size: var(--fs-title); font-weight: 700; margin-bottom: 6px; }
.hv2-cmp-add small { display: block; color: var(--hv2-faint); margin-top: 6px; line-height: 1.5; }
.hv2-cmp-addcell { background: var(--hv2-paper); border: 1.5px dashed var(--hv2-line-dark) !important; }

.hv2-cmp-picker {
  position: absolute; top: 8px; right: 8px; z-index: 20; width: min(360px, 92vw);
  background: var(--hv2-paper); border: 1px solid var(--hv2-navy); border-radius: 0.5rem;
  box-shadow: 0 14px 40px rgb(23 33 43 / 18%); padding: 14px;
}
.hv2-cmp-picker-bar input {
  width: 100%; border: 1px solid var(--hv2-line-dark); border-radius: 0.35rem;
  padding: 9px 12px; font-size: var(--fs-body); outline: none;
}
.hv2-cmp-picker-bar input:focus { border-color: var(--hv2-red); box-shadow: 0 0 0 3px var(--hv2-focus); }
.hv2-cmp-picker-brands { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0; }
.hv2-cmp-picker-brands button {
  border: 1px solid var(--hv2-line-dark); background: var(--hv2-paper); border-radius: 999px;
  padding: 4px 12px; color: var(--hv2-secondary);
}
.hv2-cmp-picker-brands button[aria-pressed="true"] { background: var(--hv2-navy); color: #fff; border-color: var(--hv2-navy); }
.hv2-cmp-picker ul {
  list-style: none; margin: 0; padding: 0; max-height: 300px; overflow-y: auto;
  border-top: 1px solid var(--hv2-line);
}
.hv2-cmp-picker li button {
  width: 100%; text-align: left; border: 0; background: none;
  padding: 9px 6px; border-bottom: 1px solid var(--hv2-line);
}
.hv2-cmp-picker li button:hover { background: var(--hv2-soft); }
.hv2-cmp-picker li button strong { display: block; font-weight: 700; color: var(--hv2-ink); }
.hv2-cmp-picker li button small { color: var(--hv2-faint); }
.hv2-cmp-picker li button[disabled] { opacity: 0.4; cursor: not-allowed; }
.hv2-cmp-picker-empty { color: var(--hv2-muted); padding: 10px 4px 2px; margin: 0; }

.hv2-cmp-foot {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  color: var(--hv2-muted); padding: 12px 2px 0;
}
.hv2-cmp-foot a { border-bottom: 1px solid var(--hv2-line-dark); }

/* ---------- 每日封面（采购决策报） ---------- */
.hv2-daily { padding-bottom: 10px; }
.hv2-masthead {
  border-bottom: 1px solid var(--hv2-line-dark); padding: 30px 0 14px;
  display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap;
}
.hv2-edition { font-family: var(--hv2-mono); color: var(--hv2-muted); }
.hv2-arch { margin-left: auto; border-bottom: 1px solid var(--hv2-line-dark); }

.hv2-front { display: grid; grid-template-columns: 7fr 5fr; border-bottom: 1px solid var(--hv2-line-dark); }
.hv2-cover-q { padding: 28px 36px 28px 0; border-right: 1px solid var(--hv2-line); }
.hv2-kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; color: var(--hv2-ink);
}
.hv2-kicker::before { content: ""; width: 4px; height: 1em; background: var(--hv2-red); }
.hv2-cover-q h3 { font-size: var(--fs-title); font-weight: 700; line-height: 1.45; margin: 10px 0 16px; }
.hv2-cover-ans {
  color: var(--hv2-ink); background: var(--hv2-soft);
  border-left: 3px solid var(--hv2-red); padding: 16px 20px; margin-bottom: 14px;
}
.hv2-cover-ans p { margin: 0 0 10px; }
.hv2-cover-ans p:last-child { margin: 0; }
.hv2-cover-meta { color: var(--hv2-muted); display: flex; gap: 14px; flex-wrap: wrap; margin: 0 0 18px; }
.hv2-cover-acts { display: flex; gap: 18px; align-items: center; }
.hv2-btn {
  background: var(--hv2-red); color: #fff !important; padding: 11px 26px;
  font-weight: 700; border-radius: 0.35rem;
}
.hv2-btn:hover { background: var(--hv2-red-dark); }
.hv2-text-link { border-bottom: 1px solid var(--hv2-ink); }
.hv2-text-link:hover { border-bottom-color: var(--hv2-red); }

.hv2-cover-news { padding: 28px 0 28px 28px; }
.hv2-cover-news > h3 { font-size: var(--fs-title); font-weight: 700; color: var(--hv2-ink); margin-bottom: 8px; }
.hv2-cn-item { padding: 12px 0; border-bottom: 1px solid var(--hv2-line); }
.hv2-cn-item a:hover b { color: var(--hv2-red); }
.hv2-cn-item b { color: var(--hv2-ink); font-weight: 700; }
.hv2-cn-item time { font-family: var(--hv2-mono); color: var(--hv2-faint); margin-left: 8px; }
.hv2-pick-why {
  color: var(--hv2-muted); margin: 6px 0 0;
  padding-left: 10px; border-left: 2px solid var(--hv2-red);
}

.hv2-cols3 { display: grid; grid-template-columns: repeat(3, 1fr); }
.hv2-col3 { padding: 24px 26px 30px; border-right: 1px solid var(--hv2-line); }
.hv2-col3:first-child { padding-left: 0; }
.hv2-col3:last-child { border-right: 0; padding-right: 0; }
.hv2-col3-head { display: flex; align-items: baseline; border-bottom: 1px solid var(--hv2-line-dark); padding-bottom: 9px; margin-bottom: 6px; }
.hv2-col3-head b { font-size: var(--fs-title); font-weight: 700; color: var(--hv2-ink); }
.hv2-col3-head a { margin-left: auto; color: var(--hv2-muted); }
.hv2-col3-desc { color: var(--hv2-faint); margin: 0 0 8px; }
.hv2-col3 ul { list-style: none; margin: 0; padding: 0; }
.hv2-col3 li { border-bottom: 1px solid var(--hv2-line); }
.hv2-col3 li a { display: block; padding: 9px 0; line-height: 1.55; }
.hv2-col3 time { display: block; font-family: var(--hv2-mono); color: var(--hv2-faint); }

/* ---------- 页脚（墨黑） ---------- */
.site-footer { background: var(--hv2-navy); color: #c8cdd2; margin-top: 36px; }
.footer-grid {
  max-width: 1200px; margin: 0 auto; padding: 34px 20px 26px;
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 36px;
}
.brand--footer { font-size: var(--fs-title); color: #fff; }
.brand--footer small { display: block; color: #9aa1a9; font-weight: 400; margin-top: 2px; }
.site-footer p { color: #9aa1a9; margin: 10px 0 0; max-width: 320px; }
.site-footer h2 { font-size: var(--fs-title); font-weight: 700; color: #fff; margin-bottom: 10px; }
.site-footer .footer-grid a:not(.brand) { display: block; color: #c8cdd2; padding: 4px 0; }
.site-footer .footer-grid a:hover { color: #fff; }
.footer-bottom {
  max-width: 1200px; margin: 0 auto; padding: 14px 20px 20px;
  border-top: 1px solid var(--hv2-navy-2);
  display: grid; gap: 8px;
  color: #9aa1a9;
}
.footer-meta,
.footer-legal {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 16px;
}
.footer-legal { justify-content: space-between; gap: 8px 24px; }
.site-footer .footer-bottom a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

/* ---------- 响应式（媒体查询内整体降档） ---------- */
@media (max-width: 1080px) {
  .hv2-portal { grid-template-columns: 200px minmax(0, 1fr) 260px; }
  .hv2-main { padding: 24px 24px 10px; }
  .hv2-rail { padding-left: 20px; }
}

@media (max-width: 900px) {
  .site-header__inner { height: 54px; gap: 14px; }
  .main-nav {
    display: none; position: absolute; top: 54px; left: 0; right: 0; z-index: 40;
    background: var(--hv2-paper); border-bottom: 1px solid var(--hv2-line-dark);
    flex-direction: column; padding: 8px 20px 14px; gap: 0;
  }
  .site-header.is-menu-open .main-nav { display: flex; }
  .site-header { position: relative; }
  .main-nav a { padding: 11px 6px; border-bottom: 1px solid var(--hv2-line); }
  .menu-toggle { display: block; margin-left: auto; }
  .header-actions { margin-left: 0; }
  .header-cooperation-link { display: none; }
  .site-search-form input { width: 110px; }

  .hv2-portal { grid-template-columns: 1fr; }
  .hv2-identity-grid { grid-template-columns: 1fr; gap: 24px; }
  .hv2-lead { max-width: 560px; }
  .hv2-toc {
    position: static; border-right: 0; border-bottom: 1px solid var(--hv2-line);
    padding: 16px 0;
  }
  .hv2-toc ul { display: flex; flex-wrap: wrap; gap: 8px; }
  .hv2-toc h3 + ul { margin-bottom: 14px; }
  .hv2-toc li a {
    border: 1px solid var(--hv2-line-dark); border-radius: 999px;
    padding: 5px 13px; background: var(--hv2-paper); border-left-width: 1px;
  }
  .hv2-toc li a.is-on { border-color: var(--hv2-red); color: var(--hv2-red); }
  .hv2-main { padding: 20px 0 6px; }
  .hv2-rail { border-left: 0; border-top: 1px solid var(--hv2-line); padding: 20px 0; }
  .hv2-front { grid-template-columns: 1fr; }
  .hv2-cover-q { border-right: 0; border-bottom: 1px solid var(--hv2-line); padding: 24px 0; }
  .hv2-cover-news { padding: 24px 0; }
  .hv2-cols3 { grid-template-columns: 1fr; }
  .hv2-col3 { border-right: 0; border-bottom: 1px solid var(--hv2-line); padding: 20px 0 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
}

@media (max-width: 640px) {
  :root { --fs-display: 24px; }
  .hv2-wrap { padding: 0 16px; }
  .site-header__inner { padding: 0 16px; }
  .hv2-identity { padding: 28px 0 24px; }
  .hv2-findq button { padding: 0 18px; }
  .hv2-cover-acts { flex-direction: column; align-items: stretch; gap: 10px; }
  .hv2-btn { text-align: center; }
  .hv2-q { grid-template-columns: 26px 1fr; gap: 10px; }
  .hv2-cluster-meta { display: none; }
  .hv2-band-head a { margin-left: 0; width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-meta,
  .footer-legal { flex-direction: column; align-items: flex-start; }
  .site-utility-bar .shell { flex-wrap: wrap; gap: 8px 18px; }
  .site-utility-bar__stats { margin-left: 0; width: 100%; }
}