/* ==========================================================================
   执手 App 官网样式（PC + 手机响应式，一套代码）
   设计取向：白底、克制留白、细描边卡片、品牌紫/粉仅作强调，避免 AI 味
   ========================================================================== */

:root {
  --brand: #8B5CF6;
  --brand-pink: #FF5C9E;
  --brand-grad: linear-gradient(to bottom right, #8B5CF6, #FF5C9E);
  --ink: #1F1F2C;          /* 主文字 */
  --ink-2: #5A5A6B;        /* 次级文字 */
  --ink-3: #7E7E92;        /* 弱文字 */
  --bg: #F7F8FA;           /* 页面底 */
  --card: #FFFFFF;
  --line: #E6E7EC;         /* 描边 */
  --line-2: #D1D3DB;
  --radius: 16px;
  --shadow: 0 6px 24px rgba(31, 31, 44, 0.06);
  --maxw: 1120px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ----------------------------- 顶部导航 ----------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.5px;
}
.brand .mark {
  width: 30px;
  height: 30px;
  background: url(../img/logo/zhishi-mark.png) center / cover no-repeat;
  display: inline-block;
  color: transparent;
  font-size: 0;
  text-indent: -9999px;
  overflow: hidden;
}
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav a {
  color: var(--ink-2);
  font-size: 15px;
  transition: color 0.15s;
}
.nav a:hover, .nav a.active { color: var(--brand); }
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  position: relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 10px;
  width: 20px;
  height: 2px;
  background: var(--ink);
  transition: 0.2s;
}
.nav-toggle span { top: 19px; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* ----------------------------- 按钮 ----------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.12s, box-shadow 0.12s, background 0.15s;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--brand-grad);
  color: #fff;
  box-shadow: 0 8px 20px rgba(139, 92, 246, 0.28);
}
.btn-ghost {
  background: #fff;
  color: var(--brand);
  border-color: rgba(255, 92, 158, 0.5);
}
.btn-line {
  background: #fff;
  color: var(--ink);
  border-color: var(--line-2);
}
.btn-sm { height: 38px; padding: 0 16px; font-size: 14px; }

/* ----------------------------- 区块通用 ----------------------------- */
.section { padding: 72px 0; }
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  margin: 0 0 10px;
  letter-spacing: 0.5px;
}
.section-head p { color: var(--ink-3); margin: 0; font-size: 16px; }

/* ----------------------------- Hero ----------------------------- */
.hero { padding: 76px 0 60px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}
.hero h1 {
  font-size: 46px;
  line-height: 1.2;
  font-weight: 800;
  margin: 0 0 18px;
  letter-spacing: 0.5px;
}
.hero h1 .accent {
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lead {
  font-size: 18px;
  color: var(--ink-2);
  margin: 0 0 28px;
  max-width: 480px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  margin-top: 36px;
}
.hero-stats > div { padding-right: 30px; }
.hero-stats > div + div {
  border-left: 1px solid var(--line-2);
  padding-left: 30px;
}
.hero-stats .num { font-size: 24px; font-weight: 700; }
.hero-stats .lbl { font-size: 13px; color: var(--ink-3); margin-top: 2px; }

/* 设备框（纯 CSS，替代大图） */
.device {
  width: 280px;
  height: 560px;
  margin: 0 auto;
  border-radius: 34px;
  background: linear-gradient(160deg, #2a2540, #1a1726);
  padding: 6px;
  box-shadow: var(--shadow);
  position: relative;
}
.device::before {
  content: "";
  position: absolute;
  top: 10px; left: 50%;
  transform: translateX(-50%);
  width: 96px; height: 16px;
  background: #0d0b14;
  border-radius: 0 0 10px 10px;
}
.device .screen {
  width: 100%; height: 100%;
  border-radius: 28px;
  background: var(--bg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
/* 设备框内 App 真界面（替代占位白条） */
.device .screen { background: #F7F8FA; }
.app { display: flex; flex-direction: column; height: 100%; }
.app-status { display: flex; align-items: center; justify-content: space-between; padding: 10px 18px 6px; font-size: 11px; font-weight: 600; color: #1a1726; }
.app-status-right { display: flex; gap: 4px; }
.app-status-right .dot { width: 5px; height: 5px; border-radius: 50%; background: #1a1726; opacity: .5; }
.app-status-right .dot:last-child { opacity: .22; }
.app-bar { display: flex; align-items: center; gap: 10px; padding: 6px 16px 12px; border-bottom: 1px solid var(--line); }
.app-logo { font-size: 17px; font-weight: 800; letter-spacing: 1px; color: #1a1726; }
.app-seg { display: flex; gap: 4px; margin-left: auto; background: #F2F3F7; border: 1px solid var(--line); border-radius: 999px; padding: 3px; }
.app-seg i { font-style: normal; font-size: 12px; color: var(--ink-3); padding: 4px 12px; border-radius: 999px; }
.app-seg i.on { background: #fff; color: #1a1726; font-weight: 700; box-shadow: 0 1px 3px rgba(0,0,0,.06); }
.app-card { margin: 14px 14px 0; background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 18px; box-shadow: 0 6px 18px rgba(26,23,38,.05); }
.app-avatar { width: 72px; height: 72px; border-radius: 22px; background: var(--brand-grad); position: relative; margin-bottom: 14px; }
.app-avatar::after { content: "✓"; position: absolute; right: -3px; bottom: -3px; width: 22px; height: 22px; border-radius: 50%; background: var(--brand-grad); color: #fff; font-size: 12px; font-weight: 700; display: flex; align-items: center; justify-content: center; border: 2px solid #fff; }
.app-name { display: flex; align-items: baseline; gap: 6px; font-size: 17px; font-weight: 700; color: #1a1726; }
.app-name em { font-style: normal; font-size: 14px; color: var(--ink-2); font-weight: 600; }
.app-badge { margin-left: auto; font-size: 10px; font-weight: 600; color: var(--brand); background: rgba(139,92,246,.12); padding: 3px 8px; border-radius: 999px; }
.app-meta { font-size: 12px; color: var(--ink-3); margin-top: 4px; }
.app-bio { font-size: 13px; color: var(--ink-2); line-height: 1.6; margin: 12px 0; }
.app-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.app-tags span { font-size: 11px; color: var(--ink-2); background: #F2F3F7; border: 1px solid var(--line); padding: 5px 10px; border-radius: 999px; }
.app-actions { display: flex; gap: 10px; margin-top: 16px; }
.app-skip { flex: 1; height: 40px; border: 1px solid var(--line-2); border-radius: 12px; background: #fff; color: var(--ink-2); font-size: 14px; font-weight: 600; }
.app-like { flex: 1.4; height: 40px; border: none; border-radius: 12px; background: var(--brand-grad); color: #fff; font-size: 14px; font-weight: 700; display: flex; align-items: center; justify-content: center; gap: 6px; }
.app-like .h { width: 14px; height: 14px; fill: #fff; }
.app-msg { display: flex; align-items: center; gap: 10px; margin: 12px 14px 0; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 12px; }
.app-msg .ava { width: 38px; height: 38px; border-radius: 12px; background: linear-gradient(135deg,#FF5C9E,#FF8FBF); flex: 0 0 auto; }
.app-msg .txt { min-width: 0; display: flex; flex-direction: column; }
.app-msg .t1 { font-size: 13px; font-weight: 600; color: #1a1726; }
.app-msg .t2 { font-size: 11px; color: var(--ink-3); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.app-nav { display: flex; justify-content: space-around; align-items: flex-end; padding: 8px 0 12px; border-top: 1px solid var(--line); margin-top: auto; background: #fff; }
.app-nav .tab { display: flex; flex-direction: column; align-items: center; gap: 3px; }
.app-nav .tab i { width: 20px; height: 20px; border-radius: 6px; background: #D8D9E0; }
.app-nav .tab.on i { background: var(--brand-grad); }
.app-nav .tab b { font-size: 10px; font-weight: 600; color: var(--ink-3); }
.app-nav .tab.on b { color: var(--brand); }

/* ----------------------------- 功能卡 ----------------------------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}
.feature .ico {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(139, 92, 246, 0.12);
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.feature h3 { margin: 0 0 8px; font-size: 18px; }
.feature p { margin: 0; color: var(--ink-2); font-size: 15px; }

/* ----------------------------- 会员卡 ----------------------------- */
.vip-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  align-items: stretch;
}
.vip-grid.single {
  grid-template-columns: minmax(0, 400px);
  justify-content: center;
}
.vip-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  position: relative;
}
.vip-card.hot {
  border-color: var(--brand);
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.18);
}
.vip-card .tag {
  position: absolute;
  top: -11px; left: 20px;
  background: var(--brand-grad);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
}
.vip-card .name { font-size: 17px; font-weight: 700; }
.vip-card .price { margin: 12px 0 2px; }
.vip-card .price .cur { font-size: 16px; }
.vip-card .price .val { font-size: 34px; font-weight: 800; }
.vip-card .price .per { color: var(--ink-3); font-size: 14px; }
.vip-card .origin {
  color: var(--ink-3);
  font-size: 13px;
  text-decoration: line-through;
  min-height: 18px;
}
.vip-card ul {
  list-style: none;
  padding: 0;
  margin: 16px 0 20px;
  flex: 1;
}
.vip-card li {
  font-size: 14px;
  color: var(--ink-2);
  padding: 7px 0 7px 22px;
  position: relative;
  border-top: 1px solid var(--line);
}
.vip-card li:first-child { border-top: none; }
.vip-card li::before {
  content: "";
  position: absolute;
  left: 0; top: 13px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--brand-pink);
}
.vip-card .btn { width: 100%; }

/* ----------------------------- 故事卡 ----------------------------- */
.story-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.story-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform 0.15s, box-shadow 0.15s;
}
.story-card:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(31,31,44,0.1); }
.story-card .cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--brand-grad);
}
.story-card .inner { padding: 18px 20px 22px; }
.story-card .who { color: var(--ink-3); font-size: 13px; margin: 0 0 6px; }
.story-card h3 { margin: 0 0 8px; font-size: 18px; }
.story-card p { margin: 0 0 12px; color: var(--ink-2); font-size: 14px; }
.story-card .more { color: var(--brand); font-size: 14px; font-weight: 600; }

/* ----------------------------- 下载区（浅色卡，黑页脚为全页唯一深色收口） ----------------------------- */
.download {
  background: #F5F2FC;
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 22px;
  padding: 52px 48px;
  text-align: center;
  color: var(--ink);
  box-shadow: var(--shadow);
}
.download h2 { font-size: 28px; margin: 0 0 10px; color: var(--ink); }
.download p { color: var(--ink-2); margin: 0 0 26px; }
.dl-links { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.qr {
  width: 132px; height: 132px;
  border: 1px solid var(--line-2);
  border-radius: 14px;
  margin: 24px auto 0;
  background:
    linear-gradient(45deg, rgba(139, 92, 246, 0.16) 25%, transparent 25%, transparent 75%, rgba(139, 92, 246, 0.16) 75%) 0 0/20px 20px,
    linear-gradient(45deg, rgba(139, 92, 246, 0.16) 25%, transparent 25%, transparent 75%, rgba(139, 92, 246, 0.16) 75%) 10px 10px/20px 20px,
    #fff;
}

/* 文章详情 */
.article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  max-width: 760px;
  margin: 0 auto;
}
.article .cover { width: 100%; border-radius: 14px; margin-bottom: 24px; aspect-ratio: 16/9; object-fit: cover; background: var(--brand-grad); }
.article h1 { font-size: 30px; margin: 0 0 10px; }
.article .meta { color: var(--ink-3); font-size: 14px; margin-bottom: 24px; }
.article .body p { color: var(--ink-2); margin: 0 0 18px; font-size: 16px; line-height: 1.9; }

/* 分页器 */
.pager {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
}
.pager .pg-info { color: var(--ink-3); font-size: 14px; }
.pager .pg-edge { color: var(--ink-3); opacity: 0.45; font-size: 14px; padding: 0 14px; }

/* 详情：左主文 + 右推荐 */
.detail-wrap {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  max-width: 1120px;
  margin: 0 auto;
}
.detail-main { flex: 1; min-width: 0; }
.detail-main .article { margin: 0; max-width: none; }
.detail-side { width: 300px; flex: none; }
.detail-side .side-title { font-size: 16px; font-weight: 700; margin: 0 0 16px; }
.rec-list { display: flex; flex-direction: column; gap: 14px; }
.rec-item {
  display: flex;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
  transition: box-shadow 0.15s, transform 0.15s;
}
.rec-item:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.rec-cover {
  width: 64px; height: 64px;
  border-radius: 8px;
  object-fit: cover;
  background: var(--brand-grad);
  flex: none;
}
.rec-body { min-width: 0; display: flex; flex-direction: column; justify-content: center; }
.rec-title {
  font-size: 14px;
  color: var(--ink);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.rec-meta { font-size: 12px; color: var(--ink-3); margin-top: 4px; }

/* ----------------------------- 页脚（科技黑） ----------------------------- */
.site-footer {
  border-top: 1px solid rgba(139, 92, 246, 0.22);
  background: #14121C;
  margin-top: 56px;
}
.site-footer .container { padding-top: 36px; padding-bottom: 26px; }
.foot-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
  padding-bottom: 26px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.foot-brand .brand { font-size: 18px; color: #fff; }
.foot-brand .foot-slogan { margin: 10px 0 0; color: rgba(255, 255, 255, 0.55); font-size: 14px; }
.foot-contact {
  margin-top: 6px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
}
.foot-nav {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
  padding-top: 6px;
}
.foot-nav a { color: rgba(255, 255, 255, 0.72); font-size: 14px; }
.foot-nav a:hover { color: #fff; }
.foot-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 18px;
  color: rgba(255, 255, 255, 0.45);
  font-size: 13px;
}
.foot-beian {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.foot-beian a { color: rgba(255, 255, 255, 0.45); }
.foot-beian a:hover { color: #fff; }

/* ----------------------------- 响应式 ----------------------------- */
@media (max-width: 900px) {
  .vip-grid { grid-template-columns: repeat(2, 1fr); }
  .story-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav {
    position: absolute;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 8px 20px 16px;
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav a:last-child { border-bottom: none; }
  .nav-toggle { display: block; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 34px; }
  .device { width: 240px; height: 480px; }
  .grid-3, .grid-2, .story-grid { grid-template-columns: 1fr; }
  .vip-grid { grid-template-columns: 1fr; }
  .section { padding: 52px 0; }
  .download { padding: 36px 20px; }
  .article { padding: 24px; }
  .hero-stats > div { padding-right: 18px; }
  .hero-stats > div + div { padding-left: 18px; }
  .foot-top { flex-direction: column; gap: 20px; }
  .foot-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .detail-wrap { flex-direction: column; gap: 24px; }
  .detail-side { width: 100%; }
}

/* 合规页脚导航 */
.foot-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 18px;
}
.foot-legal a { color: rgba(255, 255, 255, 0.6); font-size: 13px; }
.foot-legal a:hover, .foot-legal a.active { color: #fff; }

/* 协议索引与卡片 */
.legal-index h1 { font-size: 30px; margin: 0 0 8px; }
.legal-index .sub { color: var(--ink-2); margin: 0 0 28px; }
.legal-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.legal-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow);
  transition: transform 0.15s, box-shadow 0.15s;
}
.legal-card:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(31, 31, 44, 0.1); }
.legal-card h3 { margin: 0 0 8px; font-size: 18px; }
.legal-card p { margin: 0 0 12px; color: var(--ink-3); font-size: 14px; }
.legal-card .more { color: var(--brand); font-size: 14px; font-weight: 600; }

/* 举报表单 */
.report-form { max-width: 640px; margin: 0 auto; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow); }
.report-form h1 { font-size: 28px; margin: 0 0 8px; }
.report-form .rf-tip { color: var(--ink-2); margin: 0 0 24px; font-size: 14px; }
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-size: 14px; color: var(--ink-2); margin-bottom: 8px; }
.form-control {
  width: 100%; height: 44px; border: 1px solid var(--line-2); border-radius: 12px;
  padding: 0 14px; font-size: 15px; color: var(--ink); background: #fff; outline: none; box-sizing: border-box;
}
textarea.form-control { height: auto; padding: 12px 14px; resize: vertical; line-height: 1.6; }
.form-control:focus { border-color: var(--brand); }
.form-actions { text-align: right; margin-top: 6px; }
.form-ok {
  background: rgba(139, 92, 246, 0.1); border: 1px solid rgba(139, 92, 246, 0.3);
  color: var(--brand); border-radius: 12px; padding: 16px; font-size: 15px; text-align: center;
}

@media (max-width: 768px) {
  .legal-grid { grid-template-columns: 1fr; }
  .report-form { padding: 24px; }
}