/* 清风笔记 AI 专栏静态页样式。
   独立服务于 /s/ 下的观察室、技术和新闻页面，保证正文源码可见且不依赖 Vue 渲染。 */
:root {
  --bg: #07110f;
  --text: #edfdf8;
  --muted: #a7c7bd;
  --panel: rgba(8, 24, 22, 0.78);
  --panel-strong: rgba(12, 34, 31, 0.92);
  --line: rgba(105, 232, 207, 0.24);
  --cyan: #4df4d2;
  --lime: #b7f35c;
  --gold: #ffbd66;
  --rose: #ff6f9f;
  --blue: #8eb9ff;
  --ink: #0e2a32;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--text);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.78;
  letter-spacing: 0;
  background:
    linear-gradient(90deg, rgba(77, 244, 210, 0.08) 1px, transparent 1px),
    linear-gradient(0deg, rgba(183, 243, 92, 0.06) 1px, transparent 1px),
    radial-gradient(circle at 18% 8%, rgba(77, 244, 210, 0.18), transparent 28%),
    radial-gradient(circle at 88% 16%, rgba(255, 111, 159, 0.12), transparent 24%),
    radial-gradient(circle at 50% 100%, rgba(142, 185, 255, 0.14), transparent 34%),
    var(--bg);
  background-size: 48px 48px, 48px 48px, auto, auto, auto, auto;
}

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

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3,
strong {
  font-weight: 600;
}

.page-shell {
  position: relative;
  z-index: 1;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(18px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(7, 17, 15, 0.78);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.brand span:first-child {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(77, 244, 210, 0.68);
  border-radius: 8px;
  color: var(--cyan);
  box-shadow: 0 0 28px rgba(77, 244, 210, 0.16);
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
}

.topbar nav a {
  border-radius: 999px;
  padding: 6px 10px;
}

.topbar nav a:hover {
  background: rgba(77, 244, 210, 0.1);
  color: var(--cyan);
}

.hero,
.content,
.footer {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  min-height: 78vh;
  padding: 70px 0 44px;
}

.eyebrow {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 18px;
  border: 1px solid rgba(255, 189, 102, 0.32);
  border-radius: 999px;
  padding: 7px 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  background: rgba(255, 189, 102, 0.08);
}

h1 {
  max-width: 780px;
  margin-bottom: 20px;
  font-size: clamp(34px, 5.2vw, 64px);
  line-height: 1.08;
}

.lead {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.meta-row span {
  border: 1px solid rgba(77, 244, 210, 0.24);
  border-radius: 999px;
  padding: 7px 11px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  background: rgba(8, 24, 22, 0.5);
}

.hero-panel {
  position: relative;
  min-height: 430px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(77, 244, 210, 0.12), transparent 42%),
    linear-gradient(315deg, rgba(255, 111, 159, 0.12), transparent 46%),
    var(--panel);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.32);
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 34px;
  border: 1px solid rgba(77, 244, 210, 0.28);
  border-radius: 14px;
  background:
    linear-gradient(120deg, transparent 0 44%, rgba(77, 244, 210, 0.18) 45%, transparent 47%),
    linear-gradient(240deg, transparent 0 42%, rgba(255, 189, 102, 0.14) 43%, transparent 45%);
}

.orbital {
  position: absolute;
  left: 50%;
  top: 50%;
  display: grid;
  width: 180px;
  height: 180px;
  place-items: center;
  border: 1px solid rgba(77, 244, 210, 0.42);
  border-radius: 50%;
  color: var(--cyan);
  font-size: 42px;
  font-weight: 800;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 64px rgba(77, 244, 210, 0.24), inset 0 0 44px rgba(77, 244, 210, 0.12);
}

.orbital::before,
.orbital::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.orbital::before {
  inset: -42px;
  border: 1px dashed rgba(77, 244, 210, 0.32);
  animation: rotate 18s linear infinite;
}

.orbital::after {
  inset: 34px;
  border: 1px solid rgba(255, 189, 102, 0.28);
}

.signal {
  position: absolute;
  left: 9%;
  right: 9%;
  bottom: 42px;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 8px;
  align-items: end;
}

.signal span {
  min-height: 44px;
  border: 1px solid rgba(77, 244, 210, 0.26);
  border-radius: 8px 8px 3px 3px;
  background: linear-gradient(180deg, rgba(77, 244, 210, 0.34), rgba(77, 244, 210, 0.06));
}

.signal span:nth-child(2n) {
  min-height: 78px;
}

.signal span:nth-child(3n) {
  min-height: 118px;
  background: linear-gradient(180deg, rgba(255, 189, 102, 0.34), rgba(255, 189, 102, 0.06));
}

.content {
  display: grid;
  gap: 22px;
  padding: 10px 0 72px;
}

.section {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: clamp(22px, 4vw, 34px);
  background: var(--panel);
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.24);
}

.section h2 {
  margin-bottom: 14px;
  color: var(--cyan);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.18;
}

.section h3 {
  margin-bottom: 8px;
  color: var(--gold);
  font-size: 19px;
}

.section p,
.section li {
  color: var(--muted);
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.mini-card {
  border: 1px solid rgba(77, 244, 210, 0.18);
  border-radius: 12px;
  padding: 16px;
  background: rgba(7, 17, 15, 0.56);
}

.mini-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
}

.highlight {
  border-left: 4px solid var(--gold);
  padding: 18px 20px;
  color: var(--text);
  background: rgba(255, 189, 102, 0.08);
}

.source-list {
  display: grid;
  gap: 8px;
  padding-left: 0;
  list-style: none;
}

.source-list a {
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.footer {
  padding: 0 0 38px;
  color: var(--muted);
  font-size: 14px;
}

@keyframes rotate {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 48px;
  }

  .hero-panel {
    min-height: 320px;
  }

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

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