/* ==========================================================================
   金沙国际 - style.css
   全站样式：重置、变量、布局、组件、响应式
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

:root {
  --bg-main: #f3f6fb;
  --nav-navy: #07192d;
  --court-navy: #102b4c;
  --gold: #d5a63a;
  --orange: #e87524;
  --blue: #1769e0;
  --card-bg: #ffffff;
  --text-main: #1f2937;
  --text-secondary: #667085;
  --border-soft: #dfe6ef;
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --max-width: 1180px;
  --nav-height: 68px;
}

body {
  background: var(--bg-main);
  color: var(--text-main);
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Segoe UI", sans-serif;
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

section {
  padding: 60px 0;
  border-bottom: 1px solid var(--border-soft);
}

section:last-of-type {
  border-bottom: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 32px;
}

.section-tag {
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
}

.section-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--nav-navy);
}

.section-desc {
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 700px;
}

.notice-box {
  background: #fff8e8;
  border: 1px solid #f0dfae;
  border-left: 4px solid var(--gold);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 13px;
  color: #7a5a12;
  margin-bottom: 26px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  height: var(--nav-height);
  background: rgba(7, 25, 45, 0.96);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: var(--nav-height);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.nav-logo img {
  height: 40px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-menu a {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13.5px;
  color: #b9c4d4;
  transition: color 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}

.nav-menu a:hover {
  color: #ffffff;
}

.nav-menu a.active {
  color: var(--nav-navy);
  background: var(--gold);
  font-weight: 700;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-cta {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--gold), var(--orange));
  color: var(--nav-navy);
  font-weight: 700;
  font-size: 13px;
  white-space: nowrap;
  transition: transform 0.2s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: #ffffff;
  border-radius: 2px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--orange));
  color: var(--nav-navy);
}

.btn-primary:hover {
  transform: translateY(-2px);
}

.btn-outline {
  border: 1px solid var(--border-soft);
  color: var(--nav-navy);
  background: #ffffff;
}

.btn-outline:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 9px 18px;
  font-size: 13px;
}

/* ---------- Hero ---------- */
.hero {
  padding-top: 60px;
  background: linear-gradient(180deg, var(--nav-navy) 0%, var(--court-navy) 100%);
  color: #f3f6fb;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(213, 166, 58, 0.16);
  color: var(--gold);
  font-size: 12.5px;
  font-weight: 700;
  margin-bottom: 18px;
}

.hero-title {
  font-size: 34px;
  line-height: 1.4;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 18px;
}

.hero-title span {
  color: var(--gold);
}

.hero-desc {
  color: #b9c4d4;
  font-size: 15px;
  margin-bottom: 26px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.hero-info-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.hero-info-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.hero-info-item .label {
  display: block;
  color: #9fb0c5;
  font-size: 11.5px;
  margin-bottom: 4px;
}

.hero-info-item .value {
  display: block;
  color: #ffffff;
  font-size: 13.5px;
  font-weight: 700;
}

.hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.hero-visual img {
  width: 100%;
}

/* ---------- 数据速览 ---------- */
.stats {
  padding: 40px 0;
  background: var(--card-bg);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.stat-card {
  background: var(--bg-main);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
}

.stat-card .stat-value {
  font-size: 24px;
  font-weight: 800;
  color: var(--blue);
  margin-bottom: 6px;
}

.stat-card .stat-label {
  color: var(--text-secondary);
  font-size: 13px;
}

/* ---------- 下载区域 ---------- */
.download-layout {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 32px;
  align-items: start;
}

.download-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.download-card {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 4px 18px rgba(16, 43, 76, 0.05);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.download-card:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
}

.download-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.download-card-head h3 {
  font-size: 17px;
  color: var(--nav-navy);
}

.version-badge {
  font-size: 11.5px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(23, 105, 224, 0.1);
  color: var(--blue);
  font-weight: 700;
}

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 12.5px;
  color: var(--text-secondary);
}

.download-meta b {
  color: var(--text-main);
}

.download-feature {
  color: var(--text-secondary);
  font-size: 13px;
}

.download-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.download-visual {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 18px;
  text-align: center;
  box-shadow: 0 4px 18px rgba(16, 43, 76, 0.05);
}

.download-visual img {
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}

.qr-box {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-main);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 14px;
}

.qr-box svg {
  flex-shrink: 0;
  border-radius: 8px;
  background: #ffffff;
  padding: 6px;
}

.qr-box p {
  font-size: 12.5px;
  color: var(--text-secondary);
}

/* ---------- 篮球赛程 ---------- */
.schedule-filter {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.schedule-filter button {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  font-size: 12.5px;
  color: var(--text-secondary);
  background: var(--card-bg);
  transition: all 0.2s ease;
}

.schedule-filter button.active,
.schedule-filter button:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.schedule-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 30px;
}

.schedule-card {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  box-shadow: 0 4px 18px rgba(16, 43, 76, 0.05);
}

.schedule-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  gap: 10px;
  flex-wrap: wrap;
}

.schedule-date {
  font-size: 12.5px;
  color: var(--text-secondary);
}

.schedule-status {
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
}

.status-soon { background: rgba(232, 117, 36, 0.12); color: var(--orange); }
.status-watch { background: rgba(23, 105, 224, 0.12); color: var(--blue); }
.status-live { background: rgba(213, 166, 58, 0.15); color: #8a6716; }
.status-end { background: #eef1f5; color: var(--text-secondary); }
.status-sim { background: #f1e9d8; color: #8a6716; border: 1px dashed var(--gold); }

.schedule-match {
  font-size: 16px;
  font-weight: 700;
  color: var(--nav-navy);
  margin-bottom: 8px;
}

.schedule-meta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.schedule-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.tag-real {
  display: inline-block;
  font-size: 11px;
  color: var(--blue);
  background: rgba(23, 105, 224, 0.08);
  padding: 2px 9px;
  border-radius: 6px;
  margin-bottom: 8px;
}

.tag-fictional {
  display: inline-block;
  font-size: 11px;
  color: #8a6716;
  background: #f1e9d8;
  padding: 2px 9px;
  border-radius: 6px;
  margin-bottom: 8px;
}

/* ---------- 篮球栏目 / 功能卡片通用网格 ---------- */
.columns-grid,
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.column-card,
.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 4px 18px rgba(16, 43, 76, 0.05);
}

.column-icon,
.feature-icon {
  width: 44px;
  height: 44px;
}

.column-card h3,
.feature-card h3 {
  font-size: 15px;
  color: var(--nav-navy);
}

.column-card p,
.feature-card p {
  font-size: 12.5px;
  color: var(--text-secondary);
}

.column-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 11px;
}

.column-tags span {
  background: var(--bg-main);
  border: 1px solid var(--border-soft);
  padding: 3px 8px;
  border-radius: 6px;
  color: var(--text-secondary);
}

.column-update {
  font-size: 11.5px;
  color: var(--blue);
}

/* ---------- 新闻卡片 ---------- */
.news-filter-hint {
  margin-bottom: 20px;
}

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

.news-card {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 18px rgba(16, 43, 76, 0.05);
}

.news-card.wide {
  grid-column: span 2;
  flex-direction: row;
}

.news-card.wide img {
  width: 44%;
  height: auto;
  object-fit: cover;
}

.news-card img {
  height: 160px;
  width: 100%;
  object-fit: cover;
}

.news-card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.news-meta-row {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 11.5px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.news-meta-row .cat {
  color: var(--orange);
  font-weight: 700;
}

.news-card h3 {
  font-size: 15.5px;
  color: var(--nav-navy);
}

.news-card p {
  font-size: 12.5px;
  color: var(--text-secondary);
  flex: 1;
}

.news-players {
  font-size: 11.5px;
  color: var(--blue);
}

/* ---------- 球星专题 ---------- */
.stars-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.star-card {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 4px 18px rgba(16, 43, 76, 0.05);
}

.star-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.star-body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.star-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.star-head h3 {
  font-size: 17px;
  color: var(--nav-navy);
}

.star-pos {
  font-size: 12px;
  color: var(--blue);
  font-weight: 700;
}

.star-meta {
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.star-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
}

.star-desc strong {
  color: var(--text-main);
}

/* ---------- 战术专题 ---------- */
.tactics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.tactic-card {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 4px 18px rgba(16, 43, 76, 0.05);
}

.tactic-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.tactic-body {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tactic-body h3 {
  font-size: 16px;
  color: var(--nav-navy);
}

.tactic-meta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-secondary);
}

.tactic-body p {
  font-size: 13px;
  color: var(--text-secondary);
}

.tactic-issue {
  font-size: 12px;
  color: var(--orange);
}

/* ---------- 版本更新时间轴 ---------- */
.timeline {
  position: relative;
  padding-left: 28px;
  border-left: 2px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.timeline-item {
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
  border: 3px solid var(--bg-main);
  box-shadow: 0 0 0 2px var(--gold);
}

.timeline-date {
  font-size: 12.5px;
  color: var(--orange);
  font-weight: 700;
  margin-bottom: 6px;
}

.timeline-card {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  box-shadow: 0 4px 18px rgba(16, 43, 76, 0.05);
}

.timeline-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.timeline-version {
  font-size: 12px;
  font-weight: 700;
  color: var(--blue);
  background: rgba(23, 105, 224, 0.1);
  padding: 2px 10px;
  border-radius: 999px;
}

.timeline-type {
  font-size: 11.5px;
  color: var(--text-secondary);
}

.timeline-card h3 {
  font-size: 15.5px;
  color: var(--nav-navy);
  margin-bottom: 6px;
}

.timeline-card p {
  color: var(--text-secondary);
  font-size: 13px;
}

/* ---------- 原创文章 ---------- */
.article-filter {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}

.article-filter button {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  font-size: 12.5px;
  color: var(--text-secondary);
  background: var(--card-bg);
  transition: all 0.2s ease;
}

.article-filter button.active,
.article-filter button:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.article-wide {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 26px;
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 22px;
  margin-bottom: 20px;
  box-shadow: 0 4px 18px rgba(16, 43, 76, 0.05);
}

.article-wide img {
  border-radius: var(--radius-md);
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.article-meta .cat {
  color: var(--blue);
  font-weight: 700;
}

.article-wide h3 {
  font-size: 20px;
  color: var(--nav-navy);
  margin-bottom: 10px;
}

.article-body-text p {
  color: var(--text-secondary);
  font-size: 13.5px;
  margin-bottom: 10px;
}

.article-foot {
  display: flex;
  gap: 14px;
  align-items: center;
  font-size: 12px;
  color: var(--text-secondary);
  flex-wrap: wrap;
  margin-top: 10px;
}

.article-foot .related {
  color: var(--orange);
}

.article-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.article-tags span {
  background: var(--bg-main);
  border: 1px solid var(--border-soft);
  padding: 3px 9px;
  border-radius: 6px;
  font-size: 11px;
  color: var(--text-secondary);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.article-card {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 18px rgba(16, 43, 76, 0.05);
}

.article-card img {
  height: 160px;
  width: 100%;
  object-fit: cover;
}

.article-card .article-card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.article-card h3 {
  font-size: 15.5px;
  color: var(--nav-navy);
}

.article-card p {
  font-size: 12.5px;
  color: var(--text-secondary);
  flex: 1;
}

/* ---------- 安装教程 ---------- */
.guide-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.guide-visual img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
}

.guide-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.guide-tab-btn {
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  font-size: 12.5px;
  color: var(--text-secondary);
  background: var(--card-bg);
}

.guide-tab-btn.active {
  background: var(--gold);
  color: var(--nav-navy);
  border-color: var(--gold);
  font-weight: 700;
}

.guide-panel {
  display: none;
  flex-direction: column;
  gap: 14px;
}

.guide-panel.active {
  display: flex;
}

.guide-step {
  display: flex;
  gap: 14px;
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}

.guide-step .num {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(213, 166, 58, 0.15);
  color: #8a6716;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13.5px;
}

.guide-step h4 {
  font-size: 14px;
  margin-bottom: 3px;
  color: var(--nav-navy);
}

.guide-step p {
  font-size: 12.5px;
  color: var(--text-secondary);
}

.guide-fail-box {
  margin-top: 22px;
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 18px 20px;
}

.guide-fail-box h4 {
  font-size: 14.5px;
  margin-bottom: 10px;
  color: var(--orange);
}

.guide-fail-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.guide-fail-list li {
  font-size: 12.5px;
  color: var(--text-secondary);
  background: var(--bg-main);
  border: 1px solid var(--border-soft);
  padding: 6px 12px;
  border-radius: 999px;
}

/* ---------- 用户反馈 ---------- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.review-card {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 4px 18px rgba(16, 43, 76, 0.05);
}

.review-quote {
  font-size: 13px;
  color: var(--text-main);
  line-height: 1.7;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--blue));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #ffffff;
}

.review-user .name {
  font-size: 12.5px;
  color: var(--text-secondary);
}

/* ---------- FAQ ---------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 880px;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  font-size: 14px;
  font-weight: 700;
  color: var(--nav-navy);
  text-align: left;
}

.faq-question .plus {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--blue);
  transition: transform 0.2s ease;
}

.faq-item.open .faq-question .plus {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}

.faq-answer p {
  padding: 0 20px 18px;
  font-size: 13px;
  color: var(--text-secondary);
}

.faq-item.open .faq-answer {
  max-height: 260px;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--nav-navy);
  color: #b9c4d4;
  padding: 56px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 24px;
}

.footer-brand .nav-logo {
  margin-bottom: 12px;
  display: inline-block;
}

.footer-brand p {
  color: #9fb0c5;
  font-size: 13px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 14px;
  margin-bottom: 14px;
  color: #ffffff;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-col a,
.footer-col li {
  font-size: 13px;
  color: #9fb0c5;
}

.footer-col a:hover {
  color: var(--gold);
}

.footer-disclaimer {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 18px;
  margin-bottom: 14px;
  font-size: 12.5px;
  color: #d5a63a;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12px;
  color: #8494a8;
}

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--orange));
  color: var(--nav-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  box-shadow: 0 8px 24px rgba(16, 43, 76, 0.3);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 400;
}

.back-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
  .container {
    padding: 0 20px;
  }
}

@media (max-width: 992px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

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

  .columns-grid,
  .features-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .news-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .news-card.wide {
    grid-column: span 2;
  }

  .stars-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .reviews-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .article-wide {
    grid-template-columns: 260px 1fr;
  }

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

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--nav-navy);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    flex-direction: column;
    align-items: stretch;
    padding: 10px 20px 20px;
    gap: 4px;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-menu a {
    padding: 12px 10px;
    border-radius: 8px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-cta {
    padding: 9px 14px;
    font-size: 12.5px;
  }

  .hero-title {
    font-size: 26px;
  }

  .hero-info-list {
    grid-template-columns: 1fr;
  }

  .hero-actions .btn {
    flex: 1;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

  .news-card.wide {
    grid-column: span 1;
    flex-direction: column;
  }

  .news-card.wide img {
    width: 100%;
    height: 160px;
  }

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

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

  .article-wide img {
    height: 200px;
  }

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

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

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

  section {
    padding: 44px 0;
  }
}

@media (max-width: 560px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .section-title {
    font-size: 21px;
  }

  .back-top {
    right: 16px;
    bottom: 16px;
    width: 40px;
    height: 40px;
  }

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