/* ==========================================================================
   星桥科技资讯 - 全站样式
   仅使用原生 CSS，无构建步骤。
   ========================================================================== */

:root {
  --c-bg: #f5f7fa;
  --c-surface: #ffffff;
  --c-ink: #1b2430;
  --c-ink-soft: #566276;
  --c-ink-faint: #7b8798;
  --c-line: #e2e8f0;
  --c-brand: #0f4c81;
  --c-brand-dark: #0a3760;
  --c-brand-soft: #eaf2f9;
  --c-accent: #b8641c;
  --c-accent-soft: #fdf1e4;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 1px 2px rgba(27, 36, 48, .06), 0 8px 24px rgba(27, 36, 48, .06);
  --wrap: 1120px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

img, svg { max-width: 100%; height: auto; display: block; }

a { color: var(--c-brand); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 20px;
}

/* 跳转到主内容（键盘 / 读屏用户） */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--c-brand);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus {
  left: 0;
}

/* 仅读屏可见 */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------- 页头 / 导航 */
.site-header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-line);
  position: sticky;
  top: 0;
  z-index: 30;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 700;
  color: var(--c-ink);
  letter-spacing: .5px;
}
.brand:hover { text-decoration: none; }

.brand-mark {
  width: 34px; height: 34px;
  flex: none;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--c-brand), #1c7bb8);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 17px;
  font-weight: 700;
  object-fit: cover;
}

.brand-sub {
  font-size: 12px;
  font-weight: 400;
  color: var(--c-ink-faint);
  letter-spacing: 0;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 8px 12px;
  font: inherit;
  font-size: 14px;
  color: var(--c-ink);
  cursor: pointer;
}

.site-nav ul {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: block;
  padding: 9px 14px;
  border-radius: var(--radius);
  color: var(--c-ink-soft);
  font-size: 15px;
}
.site-nav a:hover {
  background: var(--c-brand-soft);
  color: var(--c-brand);
  text-decoration: none;
}
.site-nav a[aria-current="page"] {
  background: var(--c-brand);
  color: #fff;
}

/* --------------------------------------------------------- 通用区块 */
main { display: block; }

.section {
  padding-block: 56px;
}
.section + .section { padding-top: 0; }

.section-head {
  margin-bottom: 28px;
}
.section-head h2 {
  margin: 0 0 6px;
  font-size: 26px;
  letter-spacing: .5px;
}
.section-head p {
  margin: 0;
  color: var(--c-ink-soft);
}

.page-head {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-line);
  padding-block: 40px;
}
.page-head h1 {
  margin: 0 0 8px;
  font-size: 30px;
  letter-spacing: 1px;
}
.page-head p {
  margin: 0;
  max-width: 62ch;
  color: var(--c-ink-soft);
}

.breadcrumb {
  font-size: 14px;
  color: var(--c-ink-faint);
  padding-block: 16px;
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-line);
}

.card {
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

/* --------------------------------------------------------- 首页 hero */
.hero {
  background: linear-gradient(160deg, #0d3557 0%, #0f4c81 55%, #17689f 100%);
  color: #fff;
  padding-block: 72px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 44px;
  align-items: center;
}
.hero h1 {
  margin: 0 0 14px;
  font-size: 38px;
  line-height: 1.35;
  letter-spacing: 1px;
}
.hero p {
  margin: 0 0 26px;
  font-size: 17px;
  color: rgba(255, 255, 255, .85);
  max-width: 46ch;
}
.hero-tag {
  display: inline-block;
  margin-bottom: 18px;
  padding: 5px 12px;
  border: 1px solid rgba(255, 255, 255, .35);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, .9);
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--radius-lg);
  padding: 22px;
}
.hero-stats div { text-align: center; }
.hero-stats b {
  display: block;
  font-size: 25px;
  letter-spacing: .5px;
}
.hero-stats span {
  font-size: 13px;
  color: rgba(255, 255, 255, .75);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: #fff;
  color: var(--c-brand-dark);
}
.btn-primary:hover { background: #e9f1f8; }
.btn-ghost {
  border-color: rgba(255, 255, 255, .5);
  color: #fff;
}
.btn-ghost:hover { background: rgba(255, 255, 255, .12); }
.btn-solid {
  background: var(--c-brand);
  color: #fff;
}
.btn-solid:hover { background: var(--c-brand-dark); }
.btn-line {
  border-color: var(--c-line);
  background: var(--c-surface);
  color: var(--c-ink);
}
.btn-line:hover { border-color: var(--c-brand); color: var(--c-brand); }

/* --------------------------------------------------------- 频道卡片 */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.channel-card {
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.channel-card h3 {
  margin: 0;
  font-size: 20px;
}
.channel-card > p {
  margin: 0;
  color: var(--c-ink-soft);
  font-size: 15px;
}
.channel-card ul {
  margin: 0;
  padding-left: 20px;
  color: var(--c-ink-soft);
  font-size: 14px;
}
.channel-card .price-line {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed var(--c-line);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .5px;
}
.badge-brand { background: var(--c-brand-soft); color: var(--c-brand); }
.badge-accent { background: var(--c-accent-soft); color: var(--c-accent); }

.price {
  color: var(--c-accent);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: .5px;
}
.price small {
  font-size: 13px;
  font-weight: 400;
  color: var(--c-ink-faint);
}

/* --------------------------------------------------------- 资讯列表 */
.article-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.article-item {
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px 28px;
  align-items: start;
}
.article-item h3 {
  margin: 0 0 6px;
  font-size: 19px;
  line-height: 1.5;
}
.article-item .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--c-ink-faint);
  margin-bottom: 10px;
}
.article-item .excerpt {
  margin: 0;
  color: var(--c-ink-soft);
  font-size: 15px;
}
.article-item .buy {
  grid-column: 2;
  grid-row: 1 / span 2;
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
  min-width: 150px;
}

/* --------------------------------------------------------- 付费墙 / 二维码 */
.paywall {
  padding: 30px;
  background: linear-gradient(180deg, #fffdf9, var(--c-surface));
  border: 1px solid #f0e0cc;
}
.paywall-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 30px;
  align-items: start;
}
.qr-box {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 14px;
  text-align: center;
}
.qr-box img {
  margin-inline: auto;
  width: 100%;
  max-width: 220px;
}
.qr-box figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--c-ink-faint);
}
.paywall h2, .paywall h3 {
  margin: 0 0 10px;
  font-size: 21px;
}
.paywall p { margin: 0 0 12px; color: var(--c-ink-soft); }
.paywall ol {
  margin: 0;
  padding-left: 22px;
  color: var(--c-ink-soft);
  font-size: 15px;
}
.price-tag {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px dashed #ecd9c0;
}
.price-tag .price { font-size: 30px; }

.notice {
  margin-top: 16px;
  padding: 12px 14px;
  border-left: 3px solid var(--c-accent);
  background: var(--c-accent-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14px;
  color: #6d4415;
}

/* --------------------------------------------------------- 正文 */
.article-body {
  max-width: 74ch;
}
.article-body h2 {
  margin: 34px 0 12px;
  font-size: 21px;
  padding-left: 12px;
  border-left: 4px solid var(--c-brand);
  line-height: 1.4;
}
.article-body p { margin: 0 0 16px; }
.article-body ul, .article-body ol {
  margin: 0 0 16px;
  padding-left: 24px;
}
.article-body li { margin-bottom: 6px; }
.article-title {
  margin: 0 0 12px;
  font-size: 30px;
  line-height: 1.45;
  letter-spacing: .5px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 14px;
  color: var(--c-ink-faint);
  padding-bottom: 20px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--c-line);
}

.lead {
  font-size: 17px;
  color: var(--c-ink-soft);
  padding: 16px 18px;
  background: var(--c-brand-soft);
  border-radius: var(--radius);
  margin: 0 0 26px;
}

/* 摘要下方的渐隐遮罩，提示内容未完 */
.fade-out {
  position: relative;
  max-height: 260px;
  overflow: hidden;
}
.fade-out::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 120px;
  background: linear-gradient(to bottom, rgba(245, 247, 250, 0), var(--c-bg));
}

/* --------------------------------------------------------- 表格 / 信息表 */
.info-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.info-table caption {
  text-align: left;
  font-weight: 700;
  padding-bottom: 12px;
  font-size: 17px;
}
.info-table th,
.info-table td {
  text-align: left;
  padding: 13px 14px;
  border-bottom: 1px solid var(--c-line);
  vertical-align: top;
}
.info-table th {
  width: 132px;
  color: var(--c-ink-soft);
  font-weight: 600;
  background: #fafbfd;
  white-space: nowrap;
}
.info-table tr:last-child th,
.info-table tr:last-child td { border-bottom: 0; }

.pad {
  padding: 26px;
}

.stack {
  display: grid;
  gap: 22px;
}

/* --------------------------------------------------------- 时间线 */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  border-left: 2px solid var(--c-line);
}
.timeline li {
  position: relative;
  padding: 0 0 22px 8px;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 9px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--c-brand);
  border: 2px solid var(--c-surface);
}
.timeline b { display: block; letter-spacing: .5px; }
.timeline span { color: var(--c-ink-soft); font-size: 15px; }

/* --------------------------------------------------------- 页脚 */
.site-footer {
  margin-top: 64px;
  background: #12212f;
  color: rgba(255, 255, 255, .72);
  font-size: 14px;
  padding-block: 40px 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 26px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}
.site-footer h4 {
  margin: 0 0 12px;
  color: #fff;
  font-size: 15px;
  letter-spacing: .5px;
}
.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.site-footer a { color: rgba(255, 255, 255, .72); }
.site-footer a:hover { color: #fff; }
.site-footer p { margin: 0 0 8px; }
.footer-bottom {
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: space-between;
  color: rgba(255, 255, 255, .55);
  font-size: 13px;
}

/* --------------------------------------------------------- 响应式 */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 30px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .paywall-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .article-item { grid-template-columns: 1fr; }
  .article-item .buy {
    grid-column: 1;
    grid-row: auto;
    align-items: flex-start;
    text-align: left;
    padding-top: 14px;
    border-top: 1px dashed var(--c-line);
    width: 100%;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .header-inner { flex-wrap: wrap; }
  .site-nav {
    display: none;
    width: 100%;
    padding-bottom: 12px;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; gap: 2px; }
  .site-nav a { padding: 12px 14px; }
  .section { padding-block: 40px; }
  .hero { padding-block: 48px; }
  .page-head h1 { font-size: 25px; }
  .article-title { font-size: 24px; }
  .hero-stats { grid-template-columns: 1fr; gap: 16px; }
  .hero-stats div { text-align: left; display: flex; align-items: baseline; gap: 10px; }
}

@media print {
  .site-header, .site-footer, .btn-row, .paywall { display: none; }
}