/* ==========================================================================
   qooapp 专题站 · 共享样式表 (css/style.css)
   全部本地化：字体使用系统字体栈；图标采用内联 SVG；无外部 CDN。
   ========================================================================== */
:root {
  --c-primary: #6B5BFF;
  --c-primary-2: #3FA8FF;
  --c-accent: #FF8A4C;
  --c-accent-2: #FF5E84;
  --c-dark: #0F1230;
  --c-text: #1B1E32;
  --c-muted: #5A607A;
  --c-line: rgba(15, 18, 48, 0.08);
  --c-bg: #F5F7FC;
  --c-card: #FFFFFF;
  --c-success: #2BD8A3;
  --shadow-sm: 0 4px 18px rgba(15, 18, 48, 0.06);
  --shadow-md: 0 12px 36px rgba(15, 18, 48, 0.10);
  --shadow-lg: 0 24px 60px rgba(15, 18, 48, 0.18);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --gradient-brand: linear-gradient(135deg, #6B5BFF 0%, #3FA8FF 60%, #58E0C0 100%);
  --gradient-cta: linear-gradient(135deg, #FF8A4C 0%, #FF5E84 100%);
  --gradient-card: linear-gradient(160deg, rgba(107,91,255,.08), rgba(63,168,255,.08));
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "tnum";
}
img { max-width: 100%; display: block; }
a { color: var(--c-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--c-primary-2); }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 22px;
}

/* =========== 通用排版 =========== */
h1, h2, h3, h4 { color: var(--c-text); margin: 0 0 .55em; line-height: 1.25; }
h1 { font-size: clamp(28px, 4vw, 44px); letter-spacing: -.5px; }
h2 { font-size: clamp(24px, 2.6vw, 32px); letter-spacing: -.3px; }
h3 { font-size: 19px; }
p  { margin: 0 0 1em; color: var(--c-muted); }
.section-title { text-align: center; margin-bottom: 12px; }
.section-sub { text-align: center; color: var(--c-muted); max-width: 720px; margin: 0 auto 38px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  background: var(--gradient-card);
  color: var(--c-primary); font-weight: 600; font-size: 13px;
  letter-spacing: .5px;
}
.eyebrow svg { width: 14px; height: 14px; }

/* =========== 导航栏 =========== */
.site-header {
  position: sticky; top: 0; z-index: 60;
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,.78);
  border-bottom: 1px solid transparent;
  transition: border-color .25s, box-shadow .25s, background .25s;
}
.site-header.scrolled {
  border-color: var(--c-line);
  box-shadow: 0 8px 28px rgba(15,18,48,.06);
  background: rgba(255,255,255,.92);
}
.nav-wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px; gap: 18px;
}
.brand img { height: 42px; width: auto; }
.nav { display: flex; gap: 26px; }
.nav a {
  position: relative; padding: 8px 4px;
  color: var(--c-text); font-weight: 500; font-size: 15px;
}
.nav a::after {
  content: ""; position: absolute; left: 4px; right: 4px; bottom: 2px; height: 2px;
  background: var(--gradient-brand); border-radius: 2px;
  transform: scaleX(0); transform-origin: left; transition: transform .25s;
}
.nav a:hover::after, .nav a.active::after { transform: scaleX(1); }
.nav-cta { white-space: nowrap; }

/* =========== 通用按钮 =========== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 10px; padding: 13px 22px;
  border-radius: 999px; font-weight: 600; font-size: 15px;
  transition: transform .2s, box-shadow .2s, filter .2s;
  cursor: pointer; border: 0;
  text-decoration: none;
}
.btn-cta {
  color: #fff; background: var(--gradient-cta);
  box-shadow: 0 12px 30px rgba(255,138,76,.35);
}
.btn-cta:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 18px 40px rgba(255,138,76,.45); }
.btn-ghost {
  color: var(--c-text); background: #fff; border: 1px solid var(--c-line);
}
.btn-ghost:hover { color: var(--c-primary); border-color: var(--c-primary); }
.btn svg { width: 16px; height: 16px; }

/* =========== HERO =========== */
.hero {
  position: relative; overflow: hidden;
  padding: 96px 0 110px;
  background:
    radial-gradient(900px 500px at 8% -10%, rgba(107,91,255,.30), transparent 60%),
    radial-gradient(700px 400px at 110% 0%, rgba(63,168,255,.30), transparent 60%),
    linear-gradient(180deg, #0F1230 0%, #1A1F4D 50%, #0F1230 100%);
  color: #fff;
}
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%;
  filter: blur(60px); opacity: .55; pointer-events: none;
}
.hero::before { width: 280px; height: 280px; left: -90px; top: 60px;
  background: radial-gradient(circle, #FF8A4C 0%, transparent 65%); }
.hero::after  { width: 380px; height: 380px; right: -120px; bottom: -120px;
  background: radial-gradient(circle, #2BD8A3 0%, transparent 65%); }
.hero-grid {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 60px; align-items: center;
}
.hero h1 { color: #fff; }
.hero h1 span {
  background: linear-gradient(120deg, #FF8A4C, #FF5E84 50%, #58E0C0);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lede {
  color: rgba(255,255,255,.78); font-size: 17px; max-width: 540px; margin-bottom: 26px;
}
.hero .lede strong { color: #fff; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 28px; }
.hero-trust {
  display: flex; flex-wrap: wrap; gap: 22px 32px;
  color: rgba(255,255,255,.72); font-size: 14px;
}
.hero-trust span { display: inline-flex; align-items: center; gap: 6px; }
.hero-trust svg { width: 16px; height: 16px; color: #58E0C0; }

/* 手机框 */
.phone-stage { position: relative; perspective: 1200px; }
.phone {
  position: relative; width: 280px; margin: 0 auto;
  padding: 14px; border-radius: 38px;
  background: linear-gradient(160deg, rgba(255,255,255,.16), rgba(255,255,255,.04));
  border: 1px solid rgba(255,255,255,.18);
  box-shadow: var(--shadow-lg), 0 0 0 8px rgba(255,255,255,.04);
  transform: rotate(-3deg);
}
.phone::before {
  content: ""; position: absolute; top: 14px; left: 50%; transform: translateX(-50%);
  width: 92px; height: 22px; border-radius: 14px;
  background: #0F1230; border: 1px solid rgba(255,255,255,.18);
}
.phone .screen {
  border-radius: 24px; overflow: hidden;
  background: #000;
  aspect-ratio: 9/19.5;
}
.phone .screen img { width: 100%; height: 100%; object-fit: cover; }

.float-card {
  position: absolute; padding: 12px 14px; border-radius: 14px;
  background: rgba(255,255,255,.94); color: var(--c-text);
  box-shadow: var(--shadow-md); display: flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 600;
}
.float-card svg { width: 22px; height: 22px; color: var(--c-primary); }
.float-card.fc-1 { top: 12%; left: -8%; transform: rotate(-4deg); }
.float-card.fc-2 { bottom: 14%; right: -10%; transform: rotate(3deg); }
.float-card.fc-2 svg { color: var(--c-accent); }

/* =========== 数据条 =========== */
.stats {
  background: #fff;
  padding: 32px 0;
  border-bottom: 1px solid var(--c-line);
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; text-align: center;
}
.stat-card {
  padding: 12px 6px; border-radius: var(--radius-md);
}
.stat-card .v {
  font-size: 32px; font-weight: 800; letter-spacing: -.5px;
  background: var(--gradient-brand); -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.stat-card .k { color: var(--c-muted); font-size: 14px; }

/* =========== 通用板块 =========== */
section.section { padding: 96px 0; }
section.section.tight { padding: 64px 0; }
.bg-light { background: #fff; }
.bg-grey  { background: #F0F2F8; }
.bg-dark  { background: var(--c-dark); color: #fff; }

/* =========== 功能卡片 =========== */
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.feature-card {
  background: #fff; border: 1px solid var(--c-line);
  border-radius: var(--radius-lg); padding: 28px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.feature-card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(107,91,255,.3);
}
.feature-card .ic {
  width: 48px; height: 48px; border-radius: 14px;
  display: grid; place-items: center;
  background: var(--gradient-card); color: var(--c-primary);
  margin-bottom: 16px;
}
.feature-card .ic svg { width: 24px; height: 24px; }
.feature-card h3 { font-size: 18px; margin-bottom: 6px; }
.feature-card p { font-size: 14px; margin: 0; }
.feature-card .tag {
  display: inline-block; margin-top: 14px;
  padding: 3px 10px; border-radius: 999px;
  font-size: 12px; color: var(--c-primary); background: rgba(107,91,255,.08);
}

/* =========== 截图 gallery =========== */
.shots-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
}
.shots-grid .shot {
  position: relative; aspect-ratio: 9/19;
  border-radius: var(--radius-md); overflow: hidden;
  background: #0F1230;
  border: 1px solid var(--c-line);
  box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s;
}
.shots-grid .shot:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.shots-grid .shot img { width: 100%; height: 100%; object-fit: cover; }
.shots-grid .shot .label {
  position: absolute; left: 10px; top: 10px;
  padding: 4px 9px; border-radius: 999px;
  background: rgba(15,18,48,.72); color: #fff;
  font-size: 11px; font-weight: 600;
}

/* =========== 深度内容入口卡 =========== */
.deep-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.deep-card {
  position: relative; overflow: hidden;
  border-radius: var(--radius-lg); padding: 28px;
  color: #fff; background: var(--c-dark);
  min-height: 220px;
  display: flex; flex-direction: column; justify-content: space-between;
}
.deep-card.dc-1 { background: linear-gradient(135deg, #6B5BFF 0%, #3FA8FF 100%); }
.deep-card.dc-2 { background: linear-gradient(135deg, #FF8A4C 0%, #FF5E84 100%); }
.deep-card.dc-3 { background: linear-gradient(135deg, #19B27A 0%, #2BD8A3 100%); }
.deep-card .ic {
  width: 52px; height: 52px; border-radius: 14px;
  background: rgba(255,255,255,.18); display: grid; place-items: center;
}
.deep-card .ic svg { width: 26px; height: 26px; }
.deep-card h3 { color: #fff; font-size: 20px; margin-bottom: 6px; }
.deep-card p  { color: rgba(255,255,255,.86); margin: 0 0 16px; font-size: 14px; }
.deep-card a  {
  align-self: flex-start; padding: 10px 16px; border-radius: 999px;
  background: rgba(255,255,255,.18); color: #fff; font-weight: 600;
}
.deep-card a:hover { background: rgba(255,255,255,.32); color: #fff; }

/* =========== 评价 =========== */
.testi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.testi {
  background: #fff; border: 1px solid var(--c-line);
  border-radius: var(--radius-md); padding: 24px;
}
.testi .top { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.testi .ava {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--gradient-brand); display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: 18px;
}
.testi .name { font-weight: 700; }
.testi .role { color: var(--c-muted); font-size: 13px; }
.testi p { color: var(--c-text); margin: 0; font-size: 14px; }
.testi .stars { color: #FFB02E; margin-bottom: 8px; letter-spacing: 2px; }

/* =========== FAQ =========== */
.faq-list { max-width: 880px; margin: 0 auto; }
.faq-item {
  background: #fff; border: 1px solid var(--c-line);
  border-radius: var(--radius-md); padding: 18px 22px; margin-bottom: 12px;
}
.faq-item summary {
  list-style: none; cursor: pointer; font-weight: 600; color: var(--c-text);
  display: flex; align-items: center; justify-content: space-between;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; font-size: 24px; line-height: 1; color: var(--c-primary);
  transition: transform .25s;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { margin: 12px 0 0; color: var(--c-muted); }

/* =========== 文章 / 内页正文 =========== */
.article-hero {
  padding: 80px 0 40px;
  background: linear-gradient(135deg, rgba(107,91,255,.10), rgba(63,168,255,.10));
  border-bottom: 1px solid var(--c-line);
}
.article-hero .eyebrow { background: rgba(107,91,255,.15); }
.article-hero h1 { color: var(--c-text); }
.article-hero p { max-width: 720px; color: var(--c-muted); }

.article {
  padding: 60px 0;
  display: grid; grid-template-columns: 260px 1fr; gap: 48px;
}
.toc {
  position: sticky; top: 100px; align-self: flex-start;
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-md);
  padding: 22px;
}
.toc h4 { margin: 0 0 10px; font-size: 14px; color: var(--c-muted); text-transform: uppercase; letter-spacing: 1px; }
.toc ul { list-style: none; padding: 0; margin: 0; }
.toc li { padding: 6px 0; }
.toc a { color: var(--c-text); font-size: 14px; }
.toc a:hover { color: var(--c-primary); }

.prose h2 { margin-top: 36px; }
.prose h3 { margin-top: 24px; color: var(--c-primary); }
.prose p, .prose li { color: var(--c-text); }
.prose ul, .prose ol { padding-left: 22px; }
.prose blockquote {
  margin: 18px 0; padding: 14px 18px; border-left: 4px solid var(--c-primary);
  background: rgba(107,91,255,.06); color: var(--c-text); border-radius: 0 12px 12px 0;
}
.prose .step {
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-md);
  padding: 22px; margin-bottom: 18px;
}
.prose .step .num {
  display: inline-grid; place-items: center;
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--gradient-brand); color: #fff; font-weight: 700;
  margin-right: 10px;
}
.prose .feature-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 22px; align-items: center;
  background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg);
  padding: 24px; margin: 24px 0;
}
.prose .feature-row .ph {
  aspect-ratio: 9/19; border-radius: 14px; overflow: hidden;
  background: #0F1230;
}
.prose .feature-row .ph img { width: 100%; height: 100%; object-fit: cover; }

/* =========== 下载通道 =========== */
.download-bar {
  background: var(--c-dark); color: #fff;
  padding: 60px 0; text-align: center;
  background:
    radial-gradient(800px 400px at 50% 0%, rgba(107,91,255,.35), transparent 60%),
    var(--c-dark);
}
.download-bar h2 { color: #fff; }
.download-bar p  { color: rgba(255,255,255,.74); }
.download-bar .btn-cta { font-size: 17px; padding: 16px 30px; }

/* =========== footer =========== */
.site-footer {
  background: #0A0D24; color: rgba(255,255,255,.66);
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 36px;
  padding-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,.08);
}
.site-footer h4 { color: #fff; margin: 0 0 14px; font-size: 15px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { padding: 4px 0; font-size: 14px; }
.site-footer a { color: rgba(255,255,255,.66); }
.site-footer a:hover { color: #fff; }
.site-footer .brand img { height: 36px; filter: brightness(1.05); }
.tag-list li a {
  display: inline-block; padding: 5px 10px; margin: 2px 4px 2px 0;
  border-radius: 999px; background: rgba(255,255,255,.06);
  font-size: 12px;
}
.copyright { padding-top: 20px; }
.copyright p { margin: 6px 0; font-size: 13px; color: rgba(255,255,255,.55); }
.copyright .muted { color: rgba(255,255,255,.42); }

/* =========== 响应式 =========== */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .phone-stage { max-width: 320px; margin: 12px auto 0; }
  .features-grid, .deep-grid, .testi-grid { grid-template-columns: 1fr 1fr; }
  .shots-grid { grid-template-columns: 1fr 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .article { grid-template-columns: 1fr; }
  .toc { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .nav { display: none; }
  .features-grid, .deep-grid, .testi-grid, .footer-grid { grid-template-columns: 1fr; }
  .shots-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .prose .feature-row { grid-template-columns: 1fr; }
  section.section { padding: 64px 0; }
  .hero { padding: 64px 0 72px; }
  .float-card.fc-1 { left: -4%; }
  .float-card.fc-2 { right: -4%; }
}

/* =========== 导航栏 =========== */
.site-header {
  position: sticky; top: 0; z-index: 60;
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,.78);
  border-bottom: 1px solid transparent;
  transition: border-color .25s, box-shadow .25s, background .25s;
}
.site-header.scrolled {
  border-color: var(--c-line);
  box-shadow: 0 8px 28px rgba(15,18,48,.06);
  background: rgba(255,255,255,.92);
}
.nav-wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px; gap: 18px;
}

/* ✅ 新增/修改：brand 水平排列 */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;                    /* logo 与文字间距 */
  text-decoration: none;
  flex-shrink: 0;               /* 防止被压缩 */
}

.brand img {
  height: 42px;
  width: auto;
  display: block;
}

.brand .brand-text {
  display: inline-flex;
  align-items: center;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-text, #1B1E32);
  white-space: nowrap;          /* 防止换行 */
}

.brand .brand-text strong {
  font-weight: 700;
  color: var(--c-text, #1B1E32);
}

/* 如果品牌在深色背景上 */
.brand .brand-text.light,
.brand .brand-text.light strong {
  color: #fff;
}

.nav { display: flex; gap: 26px; }
.nav a {
  position: relative; padding: 8px 4px;
  color: var(--c-text); font-weight: 500; font-size: 15px;
}
.nav a::after {
  content: ""; position: absolute; left: 4px; right: 4px; bottom: 2px; height: 2px;
  background: var(--gradient-brand); border-radius: 2px;
  transform: scaleX(0); transform-origin: left; transition: transform .25s;
}
.nav a:hover::after, .nav a.active::after { transform: scaleX(1); }
.nav-cta { white-space: nowrap; }