/* 刷相册 Photoks · 站点样式
   深色为主，跟 App 保持同一套视觉语言；品牌色 #F83360。 */

:root {
  --brand: #F83360;
  --brand-dim: rgba(248, 51, 96, 0.14);
  --bg: #0B0B0D;
  --bg-raise: #141417;
  --text: #F2F2F4;
  --text-dim: #9A9AA2;
  --line: rgba(255, 255, 255, 0.10);
  --radius: 16px;
  --wrap: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 720px; }

/* ---------- 顶栏 ---------- */

.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(11, 11, 13, 0.82);
  backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap {
  display: flex; align-items: center; gap: 14px;
  height: 60px;
}
.nav .brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 650; text-decoration: none; letter-spacing: -0.01em;
}
.nav .brand img { width: 28px; height: 28px; border-radius: 7px; }
.nav .spacer { flex: 1; }
.nav a.link {
  color: var(--text-dim); text-decoration: none; font-size: 15px;
}
.nav a.link:hover { color: var(--text); }

/* ---------- 主视觉 ---------- */

.hero { padding: 72px 0 40px; text-align: center; }
.hero img.icon {
  width: 104px; height: 104px; border-radius: 24px;
  box-shadow: 0 18px 50px rgba(248, 51, 96, 0.18);
}
.hero h1 {
  font-size: clamp(34px, 6vw, 54px);
  line-height: 1.15; letter-spacing: -0.02em;
  margin: 26px 0 14px;
}
.hero .sub {
  font-size: clamp(17px, 2.2vw, 20px);
  color: var(--text-dim); margin: 0 auto; max-width: 560px;
}
.hero .cta { margin-top: 32px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 26px; border-radius: 999px;
  font-size: 16px; font-weight: 600; text-decoration: none;
  border: 1px solid transparent;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { border-color: var(--line); color: var(--text); }
.btn-ghost:hover { border-color: var(--text-dim); }

.note { color: var(--text-dim); font-size: 14px; margin-top: 16px; }

/* ---------- 手机截图 ---------- */

.shots {
  display: flex; gap: 24px; justify-content: center;
  flex-wrap: wrap; padding: 24px 0 8px;
}
.phone {
  width: 236px; border-radius: 34px; overflow: hidden;
  border: 1px solid var(--line);
  background: #000;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.55);
}
.phone img { display: block; width: 100%; height: auto; }
.phone-cap {
  text-align: center; color: var(--text-dim);
  font-size: 14px; margin-top: 12px;
}
.shot-item { width: 236px; }

/* ---------- 分区 ---------- */

section { padding: 72px 0; border-top: 1px solid var(--line); }
section h2 {
  font-size: clamp(24px, 3.4vw, 34px);
  letter-spacing: -0.015em; margin: 0 0 12px;
}
section .lead { color: var(--text-dim); margin: 0 0 36px; max-width: 620px; }

.grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.card {
  background: var(--bg-raise); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px;
}
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--text-dim); font-size: 15px; }
.card .ico {
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--brand-dim); color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  font-size: 19px; margin-bottom: 14px;
}

/* ---------- 价格 ---------- */

.price {
  background: var(--bg-raise); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 34px; text-align: center;
  max-width: 460px; margin: 0 auto;
}
.price .amount {
  font-size: 46px; font-weight: 700; letter-spacing: -0.02em;
  color: var(--brand); line-height: 1.1;
}
.price .once { color: var(--text-dim); margin: 6px 0 22px; }
.price ul { list-style: none; padding: 0; margin: 0 0 8px; text-align: left; }
.price li { padding: 7px 0 7px 26px; position: relative; font-size: 15px; }
.price li::before {
  content: "✓"; position: absolute; left: 0; color: var(--brand); font-weight: 700;
}

/* ---------- FAQ ---------- */

.faq { max-width: 720px; }
.faq details {
  border-bottom: 1px solid var(--line); padding: 18px 0;
}
.faq summary {
  cursor: pointer; font-weight: 600; font-size: 17px;
  list-style: none; display: flex; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--brand); font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq p { color: var(--text-dim); margin: 12px 0 0; font-size: 15px; }

/* ---------- 正文页（隐私 / 支持） ---------- */

.doc { padding: 56px 0 88px; }
.doc h1 { font-size: clamp(28px, 4vw, 38px); letter-spacing: -0.02em; margin: 0 0 6px; }
.doc .updated { color: var(--text-dim); font-size: 14px; margin: 0 0 8px; }
.doc h2 { font-size: 20px; margin: 40px 0 10px; }
.doc h3 { font-size: 16px; margin: 26px 0 4px; }
.doc p { color: #D6D6DB; }
.doc ul { padding-left: 22px; color: #D6D6DB; }
.doc li { margin: 7px 0; }
.doc strong { color: var(--text); }
.doc table {
  width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px;
}
.doc th, .doc td {
  text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.doc th { color: var(--text-dim); font-weight: 600; }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 64px 0 48px; }
.callout {
  background: var(--brand-dim); border: 1px solid rgba(248, 51, 96, 0.3);
  border-radius: 12px; padding: 16px 18px; margin: 20px 0;
}
.callout p { margin: 0; color: var(--text); }

/* ---------- 页脚 ---------- */

footer {
  border-top: 1px solid var(--line); padding: 40px 0 60px;
  color: var(--text-dim); font-size: 14px;
}
footer .row { display: flex; gap: 20px; flex-wrap: wrap; align-items: center; }
footer a { color: var(--text-dim); text-decoration: none; }
footer a:hover { color: var(--text); }
footer .spacer { flex: 1; }

/* 导航有 5 个链接，窄屏放不下：先收掉三个锚点，
   保留「支持」和语言切换 —— 这两个是真的要用的。 */
@media (max-width: 780px) {
  .nav a.link.section { display: none; }
  .nav .wrap { gap: 10px; }
}

@media (max-width: 600px) {
  .hero { padding: 48px 0 28px; }
  section { padding: 56px 0; }
  .phone { width: 220px; }
  .shot-item { width: 220px; }
}