/* ============================================================
   团享 · 产品官网样式
   纯静态、无外部依赖、移动端优先
   ============================================================ */

:root {
  --ink:      #12161F;
  --ink-2:    #4E5666;
  --ink-3:    #7B8496;
  --line:     #E6E9F0;
  --line-2:   #F0F2F7;
  --bg:       #FFFFFF;
  --soft:     #F6F8FC;
  --blue:     #1657D6;
  --blue-d:   #0E3C9A;
  --blue-l:   #EEF4FF;
  --gold:     #FFB020;
  --radius:   14px;
  --wrap:     1120px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

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

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.9);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line-2);
}
.nav .wrap { display: flex; align-items: center; height: 66px; gap: 32px; }
.nav.is-scrolled { box-shadow: 0 10px 30px -22px rgba(18,22,31,.42); }

.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo:hover { text-decoration: none; }
.logo .mark {
  width: 34px; height: 34px; border-radius: 9px; flex: none;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-d) 100%);
  color: #fff; font-weight: 600; font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  letter-spacing: -.5px; box-shadow: 0 4px 12px rgba(22,87,214,.22);
}
.logo .mark i { color: var(--gold); font-style: normal; }
.logo .name { font-size: 16px; font-weight: 700; color: var(--ink); letter-spacing: .5px; }
.logo .name span { font-weight: 400; font-size: 12px; color: var(--ink-3); margin-left: 6px; letter-spacing: 1px; }

.nav nav { display: flex; gap: 26px; margin-left: auto; }
.nav nav a { font-size: 14px; color: var(--ink-2); text-decoration: none; }
.nav nav a:hover { color: var(--blue); text-decoration: none; }

.nav .btn-sm {
  margin-left: 8px; padding: 9px 18px; border-radius: 999px;
  background: var(--ink); color: #fff; font-size: 13.5px; font-weight: 500;
  white-space: nowrap;
}
.nav .btn-sm:hover { background: var(--blue); text-decoration: none; }

/* 汉堡按钮（仅在窄屏出现） */
.nav-toggle {
  display: none; margin-left: 10px; width: 40px; height: 40px;
  border: 1px solid var(--line); border-radius: 10px; background: #fff;
  cursor: pointer; padding: 0; position: relative; flex: none;
}
.nav-toggle span {
  position: absolute; left: 11px; width: 18px; height: 1.8px; background: var(--ink);
  border-radius: 2px; transition: transform .22s, opacity .18s, top .22s;
}
.nav-toggle span:nth-child(1) { top: 13px; }
.nav-toggle span:nth-child(2) { top: 19px; }
.nav-toggle span:nth-child(3) { top: 25px; }
.nav.is-open .nav-toggle span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.nav.is-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav.is-open .nav-toggle span:nth-child(3) { top: 19px; transform: rotate(-45deg); }

/* 移动端面板内的 CTA，桌面端隐藏 */
.nav .nav-cta { display: none; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: 999px; font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: .18s;
  text-decoration: none;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--blue); color: #fff; box-shadow: 0 8px 22px rgba(22,87,214,.24); }
.btn-primary:hover { background: var(--blue-d); box-shadow: 0 10px 26px rgba(22,87,214,.32); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }
.btn svg { flex: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: clamp(40px, 6vw, 78px) 0 clamp(46px, 6.6vw, 86px);
  background:
    radial-gradient(720px 380px at 12% 0%, rgba(22,87,214,.10), transparent 62%),
    radial-gradient(620px 340px at 92% 18%, rgba(255,176,32,.13), transparent 60%),
    linear-gradient(180deg, var(--soft) 0%, #fff 78%);
}
.hero .wrap { display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 600; letter-spacing: 1.2px; color: var(--blue);
  background: var(--blue-l); padding: 6px 13px; border-radius: 999px; margin-bottom: 22px;
}
.eyebrow .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--blue); }

.hero h1 {
  font-size: clamp(26px, 4.6vw, 46px); line-height: 1.24; font-weight: 700; letter-spacing: -1px;
}
.hero h1 em { font-style: normal; color: var(--blue); }

.hero .lede {
  font-size: 16.5px; color: var(--ink-2); margin-top: 20px; max-width: 520px; line-height: 1.9;
}
.hero .lede b { color: var(--ink); font-weight: 600; }

.hero .acts { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }

.hero .meta {
  display: flex; gap: 8px 22px; flex-wrap: wrap;
  margin-top: 26px; font-size: 12.5px; color: var(--ink-3);
}
.hero .meta span::before { content: "·"; margin-right: 8px; color: #C9CEDA; }
.hero .meta span:first-child::before { display: none; }

/* ---------- 手机示意图 ---------- */
.phone {
  width: 268px; margin: 0 auto; position: relative;
  background: #12161F; border-radius: 38px; padding: 9px;
  box-shadow: 0 34px 70px -20px rgba(18,22,31,.34), 0 4px 14px rgba(18,22,31,.08);
}
.phone::after {
  content: ""; position: absolute; left: 50%; transform: translateX(-50%);
  top: 18px; width: 74px; height: 5px; border-radius: 99px; background: rgba(255,255,255,.22);
}
.screen {
  background: #fff; border-radius: 30px; overflow: hidden; height: 520px;
  display: flex; flex-direction: column;
}
.s-head {
  background: linear-gradient(150deg, var(--blue-d), var(--blue));
  color: #fff; padding: 34px 18px 18px;
}
.s-head .k { font-size: 10.5px; opacity: .72; letter-spacing: 1.5px; }
.s-head .t { font-size: 17px; font-weight: 700; margin-top: 5px; }
.s-head .d { font-size: 11px; opacity: .8; margin-top: 5px; line-height: 1.7; }

.s-body { padding: 14px; background: var(--soft); flex: 1; overflow: hidden; }
.s-row {
  background: #fff; border-radius: 11px; padding: 10px 12px; margin-bottom: 9px;
  display: flex; align-items: center; gap: 10px; border: 1px solid var(--line-2);
}
.s-row .ic {
  width: 30px; height: 30px; border-radius: 8px; flex: none;
  background: var(--blue-l); color: var(--blue);
  display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700;
}
.s-row .tx { min-width: 0; }
.s-row .tx b { display: block; font-size: 11.5px; font-weight: 600; }
.s-row .tx i { display: block; font-size: 10px; color: var(--ink-3); font-style: normal; }

.s-btn {
  margin: 4px 14px 16px; background: var(--ink); color: #fff;
  border-radius: 12px; text-align: center; font-size: 12.5px; font-weight: 600; padding: 12px;
}

/* ---------- 区块通用 ---------- */
section { padding: clamp(46px, 7vw, 82px) 0; }
.sec-soft { background: var(--soft); }
.sec-head { max-width: 660px; margin-bottom: 46px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-tag {
  font-size: 12px; font-weight: 600; letter-spacing: 2px; color: var(--blue);
  text-transform: uppercase; margin-bottom: 12px;
}
.sec-head h2 { font-size: clamp(22px, 2.7vw, 32px); font-weight: 700; letter-spacing: -.6px; line-height: 1.35; }
.sec-head p { font-size: 15px; color: var(--ink-2); margin-top: 14px; line-height: 1.9; }

/* ---------- 功能卡 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.fcard {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; transition: .2s;
}
.fcard:hover { border-color: #C9D6F0; box-shadow: 0 12px 30px -14px rgba(22,87,214,.22); transform: translateY(-2px); }
.fcard .ico {
  width: 42px; height: 42px; border-radius: 11px; background: var(--blue-l); color: var(--blue);
  display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
}
.fcard h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.fcard p { font-size: 13.5px; color: var(--ink-2); line-height: 1.85; }

/* ---------- 步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: s; }
.step { background: #fff; border-radius: var(--radius); padding: 30px 26px; border: 1px solid var(--line); position: relative; }
.step::before {
  counter-increment: s; content: "0" counter(s);
  font-size: 34px; font-weight: 700; color: var(--blue-l);
  position: absolute; top: 14px; right: 20px; letter-spacing: -1px;
}
.step h3 { font-size: 15.5px; font-weight: 600; margin-bottom: 9px; }
.step p { font-size: 13.5px; color: var(--ink-2); line-height: 1.85; }

/* ---------- 人群 ---------- */
.aud { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.aud .item {
  padding: 24px; border-radius: var(--radius); background: #fff;
  border-left: 3px solid var(--blue);
}
.aud .item:nth-child(2) { border-left-color: var(--gold); }
.aud .item:nth-child(3) { border-left-color: #3AAE7F; }
.aud h3 { font-size: 15px; font-weight: 600; margin-bottom: 7px; }
.aud p { font-size: 13.5px; color: var(--ink-2); line-height: 1.85; }

/* ---------- 合规声明 ---------- */
.comply {
  background: #fff; border: 1px solid var(--line); border-radius: 18px;
  padding: 38px 40px; position: relative; overflow: hidden;
}
.comply::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: linear-gradient(180deg, var(--blue), #3AAE7F);
}
.comply h2 { font-size: 21px; font-weight: 700; margin-bottom: 8px; }
.comply .sub { font-size: 13.5px; color: var(--ink-3); margin-bottom: 26px; }
.comply ul { list-style: none; display: grid; gap: 15px; }
.comply li { display: flex; gap: 12px; font-size: 14px; color: var(--ink-2); line-height: 1.85; }
.comply li .ck {
  width: 19px; height: 19px; border-radius: 50%; flex: none; margin-top: 4px;
  background: #E9F7F0; color: #22955F; font-size: 11px;
  display: flex; align-items: center; justify-content: center;
}
.comply li b { color: var(--ink); font-weight: 600; }

/* ---------- FAQ ---------- */
.faq { max-width: 800px; margin: 0 auto; }
.faq details {
  border-bottom: 1px solid var(--line); padding: 4px 0;
}
.faq summary {
  cursor: pointer; font-size: 15px; font-weight: 500; padding: 18px 30px 18px 0;
  list-style: none; position: relative; outline: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 4px; top: 15px;
  font-size: 20px; font-weight: 300; color: var(--ink-3); transition: .2s;
}
.faq details[open] summary::after { transform: rotate(45deg); color: var(--blue); }
.faq details p { font-size: 14px; color: var(--ink-2); padding: 0 0 20px; line-height: 1.95; }

/* ---------- CTA ---------- */
.cta {
  background: linear-gradient(135deg, var(--blue-d), var(--blue) 70%);
  border-radius: 22px; padding: 54px 48px; color: #fff;
  display: flex; align-items: center; justify-content: space-between; gap: 36px; flex-wrap: wrap;
}
.cta h2 { font-size: clamp(21px, 2.5vw, 28px); font-weight: 700; letter-spacing: -.4px; }
.cta p { font-size: 14.5px; opacity: .82; margin-top: 10px; }
.cta .btn { background: #fff; color: var(--blue-d); }
.cta .btn:hover { background: #F2F6FF; }

/* ---------- 页脚 ---------- */
footer {
  background: var(--soft); border-top: 1px solid var(--line);
  padding: 54px 0 34px; font-size: 13px; color: var(--ink-2);
}
.f-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.1fr; gap: 34px; }
.f-brand .logo { margin-bottom: 14px; }
.f-brand p { font-size: 12.5px; color: var(--ink-3); line-height: 1.95; max-width: 300px; }
footer h4 { font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 13px; letter-spacing: .3px; }
footer ul { list-style: none; display: grid; gap: 9px; }
footer ul a, footer ul li { font-size: 12.5px; color: var(--ink-2); text-decoration: none; line-height: 1.7; }
footer ul a:hover { color: var(--blue); text-decoration: none; }

.f-bottom {
  margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 12px; color: var(--ink-3);
}
.f-bottom .icp a { color: var(--ink-3); text-decoration: none; }
.f-bottom .icp a:hover { color: var(--blue); }
.f-note { font-size: 11.5px; color: #9AA2B2; margin-top: 14px; line-height: 1.9; }

/* ---------- 发布到抖音说明 ---------- */
.dy-note {
  margin-top: 22px; padding: 13px 17px;
  font-size: 12.5px; color: var(--ink-3); line-height: 1.85;
  background: var(--soft); border: 1px solid var(--line); border-radius: 10px;
}

/* ---------- 法务页 ---------- */
.legal { padding: 60px 0 90px; }
.legal .wrap { max-width: 820px; }
.legal h1 { font-size: clamp(23px, 3.2vw, 30px); font-weight: 700; letter-spacing: -.5px; }
.legal .upd { font-size: 12.5px; color: var(--ink-3); margin: 12px 0 34px; }
.legal .lead-box {
  background: var(--soft); border: 1px solid var(--line); border-radius: 12px;
  padding: 20px 24px; font-size: 13.5px; color: var(--ink-2); line-height: 1.9; margin-bottom: 34px;
}
.legal h2 { font-size: 17px; font-weight: 600; margin: 34px 0 12px; padding-top: 4px; }
.legal h3 { font-size: 14.5px; font-weight: 600; margin: 20px 0 8px; color: var(--ink); }
.legal p, .legal li { font-size: 14px; color: var(--ink-2); line-height: 2; }
.legal p { margin-bottom: 10px; }
.legal ul, .legal ol { padding-left: 22px; margin: 8px 0 12px; }
.legal li { margin-bottom: 6px; }
.legal b { color: var(--ink); font-weight: 600; }
.legal .back { display: inline-block; margin-bottom: 26px; font-size: 13px; color: var(--ink-3); }
.legal .tbl { width: 100%; border-collapse: collapse; margin: 14px 0 18px; font-size: 13px; }
.legal .tbl th, .legal .tbl td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.legal .tbl th { background: var(--soft); font-weight: 600; color: var(--ink); font-size: 12.5px; }
.legal .tbl td { color: var(--ink-2); }

/* ---------- 表格横向滚动（移动端） ---------- */
.legal .tbl-wrap {
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  margin: 14px 0 18px; border-radius: 10px;
}
.legal .tbl-wrap .tbl { min-width: 620px; margin: 0; }

/* ============================================================
   响应式
   ============================================================ */

/* 中屏：三栏降两栏 */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .f-top { grid-template-columns: 1.4fr 1fr; row-gap: 32px; }
  .hero .wrap { gap: 40px; }
}

/* 平板 / 大手机：单列 + 移动端菜单 */
@media (max-width: 900px) {
  .nav .wrap { height: 60px; gap: 12px; }
  .nav .logo .name span { display: none; }

  .nav nav {
    display: none;
    position: absolute; left: 0; right: 0; top: 100%;
    background: #fff; border-bottom: 1px solid var(--line);
    box-shadow: 0 22px 44px -20px rgba(18,22,31,.24);
    padding: 6px 20px 18px;
    flex-direction: column; gap: 0; margin: 0;
  }
  .nav.is-open nav { display: flex; }
  .nav nav a {
    padding: 14px 2px; border-bottom: 1px solid var(--line-2);
    font-size: 15px; color: var(--ink);
  }
  .nav nav a:last-of-type { border-bottom: none; }
  .nav nav a.nav-cta {
    display: block; margin: 16px 0 2px; padding: 13px;
    background: var(--ink); color: #fff; border: none; border-radius: 999px;
    text-align: center; font-size: 14.5px; font-weight: 600;
  }
  .nav-toggle { display: block; margin-left: auto; }
  .nav .btn-sm { display: none; }

  .hero .wrap { grid-template-columns: 1fr; gap: 34px; }
  .phone { transform: scale(.94); transform-origin: center top; }
  .hero .lede { max-width: none; }
  .hero .acts { margin-top: 26px; }
}

/* 竖屏手机：全部单列 */
@media (max-width: 760px) {
  .grid-3, .steps, .aud { grid-template-columns: 1fr; }
  .step::before { font-size: 28px; top: 12px; right: 16px; }
  .cta { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  body { font-size: 15px; line-height: 1.72; }
  .wrap { padding: 0 18px; }

  .hero { padding-top: 34px; }
  .hero .eyebrow { margin-bottom: 16px; font-size: 11.5px; }
  .hero h1 { letter-spacing: -.5px; }
  .hero .lede { font-size: 14.5px; margin-top: 16px; }
  .hero .acts { gap: 10px; }
  .hero .acts .btn { flex: 1 1 100%; padding: 13px 18px; font-size: 14.5px; }
  .hero .meta { margin-top: 20px; font-size: 12px; gap: 6px 14px; }

  .phone { width: 236px; }
  .screen { height: 452px; border-radius: 26px; }
  .phone { border-radius: 32px; }
  .s-head { padding: 30px 15px 15px; }
  .s-head .t { font-size: 15px; }
  .s-body { padding: 11px; }
  .s-row { padding: 9px 10px; margin-bottom: 8px; }
  .s-btn { font-size: 11.5px; padding: 11px; margin-bottom: 14px; }

  .sec-head { margin-bottom: 30px; }
  .sec-head p { font-size: 14px; }
  .fcard { padding: 20px 18px; }
  .step { padding: 24px 20px; }
  .comply { padding: 24px 20px; border-radius: 14px; }
  .comply h2 { font-size: 18px; }
  .comply li { font-size: 13.5px; gap: 10px; }
  .cta { padding: 30px 22px; border-radius: 18px; }
  .cta .btn { width: 100%; }

  .faq summary { font-size: 14.5px; padding: 16px 26px 16px 0; }
  .faq details p { font-size: 13.5px; }

  footer { padding: 40px 0 28px; }
  .f-top { grid-template-columns: 1fr; gap: 26px; }
  .f-bottom { flex-direction: column; gap: 8px; margin-top: 28px; }

  .legal { padding: 34px 0 60px; }
  .legal .wrap { padding: 0 18px; }
  .legal .lead-box { padding: 16px 18px; font-size: 13px; }
  .legal h2 { font-size: 16px; margin-top: 26px; }
  .legal p, .legal li { font-size: 13.5px; line-height: 1.95; }
  .legal ul, .legal ol { padding-left: 18px; }
}

@media (max-width: 420px) {
  .wrap { padding: 0 15px; }
  .phone { transform: scale(.88); transform-origin: center top; margin-bottom: -40px; }
  .nav .logo .name { font-size: 15px; }
  .f-bottom { font-size: 11.5px; }
}

/* 大屏：内容不散开 */
@media (min-width: 1440px) {
  .hero .wrap { gap: 72px; }
  .phone { transform: scale(1.04); }
}

/* 移动端：表格转为卡片式堆叠，避免横向裁切 */
@media (max-width: 640px) {
  .legal .tbl-wrap { overflow: visible; margin: 16px 0 20px; }
  .legal .tbl-wrap .tbl {
    min-width: 0; display: block; border-collapse: separate; border-spacing: 0;
  }
  .legal .tbl thead { display: none; }
  .legal .tbl tbody, .legal .tbl tr, .legal .tbl td { display: block; width: 100%; }
  .legal .tbl tr {
    border: 1px solid var(--line); border-radius: 12px;
    background: #fff; padding: 6px 14px; margin-bottom: 10px;
  }
  .legal .tbl tr:last-child { margin-bottom: 0; }
  .legal .tbl td {
    border: none; padding: 9px 0; font-size: 13px; line-height: 1.8;
    border-bottom: 1px dashed var(--line-2);
  }
  .legal .tbl td:last-child { border-bottom: none; padding-bottom: 11px; }
  .legal .tbl td:first-child { padding-top: 11px; font-weight: 600; color: var(--ink); }
  .legal .tbl td[data-label]::before {
    content: attr(data-label);
    display: block; font-size: 10.5px; color: var(--ink-3);
    letter-spacing: .4px; margin-bottom: 2px; font-weight: 400;
  }
  .legal .tbl td:first-child::before { display: none; }
}

/* 打印 / 减少动效 */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}