/* 海角社区 HAI JIAO - 全站样式 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #3C485A;
  background: #FFFFFF;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: #1677EE; text-decoration: none; transition: color 0.2s; }
a:hover { color: #075FC6; }
a:focus-visible { outline: 2px solid #3395FF; outline-offset: 2px; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { width: 100%; max-width: 1320px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 820px; margin: 0 auto; padding: 0 24px; }
.container-mid { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* 颜色变量 */
:root {
  --brand: #1677EE;
  --brand-light: #3395FF;
  --brand-dark: #075FC6;
  --navy: #0A315E;
  --navy-deep: #071D37;
  --title: #16243A;
  --text: #3C485A;
  --text-secondary: #6B7787;
  --text-muted: #929BA8;
  --bg-soft: #F7FAFF;
  --bg-blue: #EDF5FF;
  --bg-soft-blue: #E5F1FF;
  --white: #FFFFFF;
  --light-text: #DCEEFF;
  --border: rgba(22,119,238,0.12);
  --shadow: 0 12px 34px rgba(30,72,120,0.08);
  --shadow-brand: 0 14px 40px rgba(22,119,238,0.14);
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand img {
  height: 36px;
  width: auto;
  object-fit: contain;
}
.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--title);
  letter-spacing: 0.02em;
}
.brand-en {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
  margin-left: 2px;
}
.nav-desktop {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-desktop a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--text);
  border-radius: 8px;
  min-height: 44px;
  white-space: nowrap;
}
.nav-desktop a:hover { background: var(--bg-soft); color: var(--brand); }
.nav-desktop a.active {
  background: var(--bg-blue);
  color: var(--brand);
  font-weight: 600;
}
.nav-desktop a.active::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.header-actions a, .header-actions button {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
}
.header-actions a:hover, .header-actions button:hover {
  background: var(--bg-soft);
  color: var(--brand);
}
.btn-app {
  background: linear-gradient(135deg, #3998FF 0%, #1677EE 55%, #075FC6 100%) !important;
  color: #fff !important;
  font-weight: 600;
  padding: 8px 16px !important;
  border-radius: 10px !important;
}
.btn-app:hover { opacity: 0.92; }

/* 手机顶部 */
.header-mobile {
  display: none;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  padding: 0 16px;
  max-width: 1320px;
  margin: 0 auto;
}
.mobile-logo img { height: 30px; object-fit: contain; }
.icon-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--title);
}
.icon-btn:hover { background: var(--bg-soft); }
.icon-btn svg { width: 22px; height: 22px; }

/* 主内容 */
main { min-height: 60vh; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 12px;
  min-height: 44px;
  transition: all 0.2s;
}
.btn-primary {
  background: linear-gradient(135deg, #3998FF 0%, #1677EE 55%, #075FC6 100%);
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.btn-primary:hover { opacity: 0.92; color: #fff; transform: translateY(-1px); }
.btn-secondary {
  background: var(--bg-blue);
  color: var(--brand);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-soft-blue); }
.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.4);
  color: #fff;
  background: transparent;
}
.btn-outline:hover { background: rgba(255,255,255,0.12); color: #fff; }

/* Hero Banner */
.hero-banner {
  position: relative;
  width: 100%;
  aspect-ratio: 16/7;
  max-height: 520px;
  overflow: hidden;
  background: linear-gradient(135deg, #0A315E 0%, #1677EE 50%, #3395FF 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 40px 24px;
  max-width: 800px;
}
.hero-content h1 {
  font-size: 48px;
  font-weight: 800;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.25);
}
.hero-content p {
  font-size: 18px;
  color: #DCEEFF;
  margin-bottom: 28px;
  line-height: 1.6;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,29,55,0.35) 0%, rgba(10,49,94,0.55) 100%);
  z-index: 1;
}

/* 四格导航 */
.quad-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: -40px auto 48px;
  max-width: 1320px;
  padding: 0 24px;
  position: relative;
  z-index: 5;
}
.quad-card {
  background: #fff;
  border-radius: 16px;
  padding: 28px 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s;
  text-align: center;
}
.quad-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-brand);
}
.quad-card .icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  border-radius: 12px;
  background: var(--bg-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--brand);
}
.quad-card h3 {
  font-size: 17px;
  color: var(--title);
  margin-bottom: 8px;
  font-weight: 700;
}
.quad-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* 区块通用 */
.section {
  padding: 56px 0;
}
.section-soft { background: var(--bg-soft); }
.section-blue { background: var(--bg-blue); }
.section-navy {
  background: var(--navy);
  color: #fff;
}
.section-navy h2, .section-navy h3 { color: #fff; }
.section-navy p, .section-navy li { color: var(--light-text); }
.section-header {
  text-align: center;
  margin-bottom: 40px;
}
.section-header h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--title);
  margin-bottom: 10px;
}
.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}
.section-navy .section-header h2 { color: #fff; }
.section-navy .section-header p { color: var(--light-text); }

/* 卡片网格 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-brand);
}
.card-body { padding: 24px; }
.card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 10px;
  line-height: 1.4;
}
.card p {
  font-size: 15px;
  color: var(--text);
  line-height: 1.65;
}
.card .meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 12px;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand);
}
.card-link:hover { color: var(--brand-dark); }

/* 特色图文 */
.feature-row {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}
.feature-row.reverse { grid-template-columns: 0.85fr 1.15fr; }
.feature-row.reverse .feature-text { order: 2; }
.feature-row.reverse .feature-media { order: 1; }
.feature-text h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--title);
  margin-bottom: 16px;
}
.feature-text p {
  font-size: 16px;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.75;
}
.feature-media {
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #EDF5FF, #E5F1FF);
  border: 1px solid var(--border);
}
.feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.city-feature-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 时间板 */
.time-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.time-card {
  background: #fff;
  border-radius: 16px;
  padding: 28px 22px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.time-card .time-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}
.time-card h3 {
  font-size: 18px;
  color: var(--title);
  margin-bottom: 10px;
}
.time-card p {
  font-size: 14px;
  color: var(--text);
  line-height: 1.6;
}

/* 兴趣标签墙 */
.interest-wall {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.interest-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 18px;
  text-align: center;
  transition: all 0.2s;
}
.interest-item:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow-brand);
  transform: translateY(-2px);
}
.interest-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 6px;
}
.interest-item p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* 故事区 */
.story-main {
  background: #fff;
  border-radius: 20px;
  padding: 36px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 28px;
}
.story-main h3 {
  font-size: 24px;
  color: var(--title);
  margin-bottom: 16px;
}
.story-main p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 12px;
}
.story-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.story-short {
  background: var(--bg-soft);
  border-radius: 14px;
  padding: 22px;
  border: 1px solid var(--border);
}
.story-short h4 {
  font-size: 16px;
  color: var(--title);
  margin-bottom: 8px;
}
.story-short p {
  font-size: 14px;
  color: var(--text);
  line-height: 1.65;
}

/* 媒体槽位 */
.media-slot {
  background: linear-gradient(145deg, #EDF5FF 0%, #F7FAFF 50%, #FFFFFF 100%);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  position: relative;
}
.media-slot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.album-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 16px;
}
.album-wide { grid-column: 1 / 2; grid-row: 1 / 3; aspect-ratio: 3/4; }
.album-mid { aspect-ratio: 4/3; }
.album-small { aspect-ratio: 1/1; }

/* APP 预览 */
.app-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.app-preview-image {
  max-height: 520px;
  width: auto;
  margin: 0 auto;
  object-fit: contain;
}
.app-media {
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(160deg, #EDF5FF, #E5F1FF);
  border-radius: 24px;
  padding: 32px;
  border: 1px solid var(--border);
  min-height: 400px;
}
.app-media img {
  max-width: 280px;
  max-height: 520px;
  object-fit: contain;
}

/* 列表项 */
.list-block { display: flex; flex-direction: column; gap: 16px; }
.list-item {
  background: #fff;
  border-radius: 14px;
  padding: 22px 24px;
  border: 1px solid var(--border);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.list-item .num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-blue);
  color: var(--brand);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.list-item h3 {
  font-size: 17px;
  color: var(--title);
  margin-bottom: 6px;
}
.list-item p {
  font-size: 14px;
  color: var(--text);
  line-height: 1.65;
}

/* 话题卡片 */
.topic-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.topic-card {
  background: #fff;
  border-radius: 14px;
  padding: 24px;
  border: 1px solid var(--border);
  transition: border-color 0.2s;
}
.topic-card:hover { border-color: var(--brand); }
.topic-card h3 {
  font-size: 17px;
  color: var(--title);
  margin-bottom: 8px;
}
.topic-card p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* 页面头 */
.page-hero {
  background: linear-gradient(135deg, #0A315E 0%, #1677EE 100%);
  padding: 64px 0 56px;
  color: #fff;
  text-align: center;
}
.page-hero h1 {
  font-size: 40px;
  font-weight: 800;
  margin-bottom: 12px;
  color: #fff;
}
.page-hero p {
  font-size: 17px;
  color: var(--light-text);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.6;
}
.page-hero-soft {
  background: var(--bg-soft);
  padding: 48px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.page-hero-soft h1 {
  font-size: 36px;
  font-weight: 800;
  color: var(--title);
  margin-bottom: 10px;
}
.page-hero-soft p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* 文章正文 */
.article-body {
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 24px 60px;
}
.article-body h2 {
  font-size: 24px;
  color: var(--title);
  margin: 32px 0 14px;
  font-weight: 700;
}
.article-body h3 {
  font-size: 19px;
  color: var(--title);
  margin: 24px 0 10px;
}
.article-body p {
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 16px;
  color: var(--text);
}
.article-body ul, .article-body ol {
  margin: 12px 0 20px 24px;
}
.article-body li {
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 8px;
  color: var(--text);
  list-style: disc;
}
.article-body ol li { list-style: decimal; }

/* 安全页深蓝 */
.security-block {
  background: var(--navy);
  border-radius: 20px;
  padding: 36px;
  color: #fff;
}
.security-block h2, .security-block h3 { color: #fff; }
.security-block p, .security-block li { color: var(--light-text); }

/* 隐私卡片 */
.privacy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.privacy-card {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: 16px;
  padding: 28px;
}
.privacy-card h3 {
  font-size: 17px;
  color: var(--title);
  margin-bottom: 10px;
}
.privacy-card p {
  font-size: 14px;
  color: var(--text);
  line-height: 1.65;
}

/* FAQ */
details {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
}
summary {
  padding: 18px 22px;
  font-size: 16px;
  font-weight: 600;
  color: var(--title);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: "+";
  font-size: 20px;
  color: var(--brand);
  font-weight: 400;
}
details[open] summary::after { content: "−"; }
details .faq-answer {
  padding: 0 22px 20px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.7;
}

/* 页脚 */
.site-footer {
  background: var(--navy-deep);
  color: var(--light-text);
  padding: 56px 0 0;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1.2fr;
  gap: 36px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand img {
  height: 32px;
  object-fit: contain;
  margin-bottom: 12px;
}
.footer-brand .name {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}
.footer-brand .en {
  font-size: 12px;
  color: rgba(220,238,255,0.7);
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 13px;
  line-height: 1.65;
  color: rgba(220,238,255,0.75);
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: rgba(220,238,255,0.75);
  padding: 5px 0;
  min-height: 32px;
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(220,238,255,0.55);
}

/* Mega Menu / 频道抽屉 */
.mega-overlay {
  position: fixed;
  inset: 0;
  background: rgba(7,29,55,0.45);
  z-index: 1100;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s, visibility 0.25s;
}
.mega-overlay.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.mega-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: min(920px, 100%);
  height: 100%;
  background: #fff;
  z-index: 1101;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
  box-shadow: -12px 0 40px rgba(0,0,0,0.12);
}
.mega-panel.open { transform: translateX(0); }
.mega-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 2;
}
.mega-header .brand-area {
  display: flex;
  align-items: center;
  gap: 10px;
}
.mega-header .brand-area img { height: 28px; }
.mega-close {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 24px;
  color: var(--text);
}
.mega-close:hover { background: var(--bg-soft); }
.mega-body {
  padding: 28px 32px 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.mega-group h3 {
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}
.mega-group a {
  display: block;
  padding: 10px 0;
  font-size: 15px;
  color: var(--title);
  border-bottom: 1px solid transparent;
  min-height: 44px;
  display: flex;
  align-items: center;
}
.mega-group a:hover {
  color: var(--brand);
  border-bottom-color: var(--border);
}

/* 搜索面板 */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(7,29,55,0.5);
  z-index: 1200;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
}
.search-overlay.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.search-box {
  background: #fff;
  border-radius: 16px;
  width: min(640px, 92%);
  padding: 24px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.search-box input {
  width: 100%;
  padding: 14px 18px;
  font-size: 16px;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  outline: none;
  color: var(--title);
}
.search-box input:focus { border-color: var(--brand); }
.search-hint {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-muted);
}

/* 手机底部导航 */
.mobile-tabbar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(56px + env(safe-area-inset-bottom, 0px));
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: rgba(255,255,255,0.97);
  border-top: 1px solid var(--border);
  z-index: 900;
  justify-content: space-around;
  align-items: center;
}
.mobile-tabbar a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-size: 11px;
  color: var(--text-secondary);
  min-width: 56px;
  min-height: 48px;
  padding: 4px;
}
.mobile-tabbar a.active { color: var(--brand); font-weight: 600; }
.mobile-tabbar svg { width: 22px; height: 22px; }

/* 脉冲信息条 */
.pulse-item {
  background: #fff;
  border-radius: 12px;
  padding: 18px 22px;
  border: 1px solid var(--border);
  margin-bottom: 12px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.pulse-item .tag {
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 700;
  color: var(--brand);
  background: var(--bg-blue);
  padding: 4px 10px;
  border-radius: 6px;
}
.pulse-item p {
  font-size: 14px;
  color: var(--text);
  line-height: 1.6;
}

/* 响应式 */
@media (max-width: 1280px) {
  .quad-nav { gap: 16px; }
  .card-grid { gap: 18px; }
  .interest-wall { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 1024px) {
  .nav-desktop { display: none; }
  .header-inner { display: none; }
  .header-mobile { display: flex; }
  .hero-content h1 { font-size: 36px; }
  .quad-nav { grid-template-columns: repeat(2, 1fr); margin-top: -28px; }
  .feature-row, .feature-row.reverse { grid-template-columns: 1fr; gap: 28px; }
  .feature-row.reverse .feature-text, .feature-row.reverse .feature-media { order: unset; }
  .app-section { grid-template-columns: 1fr; gap: 32px; }
  .app-media img { max-width: 240px; }
  .time-board { grid-template-columns: repeat(2, 1fr); }
  .interest-wall { grid-template-columns: repeat(3, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 28px; }
  .mega-body { grid-template-columns: repeat(2, 1fr); }
  .album-grid { grid-template-columns: 1fr 1fr; }
  .album-wide { grid-column: 1 / -1; grid-row: auto; aspect-ratio: 16/9; }
}
@media (max-width: 768px) {
  .mobile-tabbar { display: flex; }
  body { padding-bottom: calc(60px + env(safe-area-inset-bottom, 0px)); }
  .hero-banner { aspect-ratio: 16/10; max-height: 380px; }
  .hero-content h1 { font-size: 32px; }
  .hero-content p { font-size: 15px; }
  .section { padding: 40px 0; }
  .section-header h2 { font-size: 24px; }
  .card-grid, .card-grid-2, .card-grid-4 { grid-template-columns: 1fr; }
  .time-board { grid-template-columns: 1fr; }
  .interest-wall { grid-template-columns: repeat(2, 1fr); }
  .story-grid { grid-template-columns: 1fr; }
  .topic-list { grid-template-columns: 1fr; }
  .privacy-grid { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: 28px; }
  .page-hero-soft h1 { font-size: 26px; }
  .footer-top { grid-template-columns: 1fr; }
  .mega-body { grid-template-columns: 1fr; padding: 20px; }
  .mega-panel { width: 100%; }
  .quad-nav { grid-template-columns: 1fr 1fr; gap: 12px; }
  .quad-card { padding: 20px 16px; }
  .list-item { flex-direction: column; gap: 8px; }
}
@media (max-width: 560px) {
  .container, .container-mid, .container-narrow { padding: 0 16px; }
  .hero-content h1 { font-size: 28px; }
  .interest-wall { grid-template-columns: 1fr 1fr; gap: 10px; }
  .interest-item { padding: 16px 12px; }
  .interest-item h3 { font-size: 15px; }
  .quad-card h3 { font-size: 15px; }
  .section-header h2 { font-size: 22px; }
}

/* 工具类 */
.text-center { text-align: center; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-24 { margin-bottom: 24px; }
.mb-40 { margin-bottom: 40px; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}