/* =========================================================
   汽水音乐官网 (qishuiorg.com) — 全新样式
   品牌渐变：#FCFB47 → #89FC44 → #27FD41 → #24FDCF
   ========================================================= */

:root {
  --bg: #070b09;
  --bg-soft: #0d1512;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #f2f5f3;
  --text-dim: rgba(242, 245, 243, 0.62);
  --text-faint: rgba(242, 245, 243, 0.38);
  --accent: #27fd7c;
  --grad: linear-gradient(115deg, #fcfb47 0%, #89fc44 32%, #27fd41 58%, #24fdcf 100%);
  --grad-soft: linear-gradient(115deg, rgba(252, 251, 71, 0.16), rgba(36, 253, 207, 0.16));
  --radius: 16px;
  --maxw: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }

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

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ===== Ambient background glow ===== */
.bg-orbs { position: fixed; inset: 0; z-index: -2; overflow: hidden; pointer-events: none; }
.bg-orbs::before,
.bg-orbs::after {
  content: "";
  position: absolute;
  width: 620px; height: 620px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.22;
}
.bg-orbs::before {
  top: -180px; left: -120px;
  background: radial-gradient(circle, #fcfb47, transparent 70%);
}
.bg-orbs::after {
  bottom: -220px; right: -140px;
  background: radial-gradient(circle, #24fdcf, transparent 70%);
}
.bg-grid {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image: radial-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(7, 11, 9, 0.72);
  border-bottom: 1px solid var(--card-border);
}
.nav {
  height: 64px; display: flex; align-items: center; gap: 36px;
}
.nav .brand { display: flex; align-items: center; gap: 10px; margin-right: auto; }
.nav .brand img { height: 26px; width: auto; }
.nav-links { display: flex; gap: 30px; }
.nav-links a {
  font-size: 14px; color: var(--text-dim); transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  padding: 9px 18px; border-radius: 999px; font-size: 14px; font-weight: 600;
  color: #06120b; background: var(--grad);
  transition: transform 0.2s, box-shadow 0.2s;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(39, 253, 124, 0.28); }
.nav-toggle { display: none; }
.mobile-menu { display: none; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 52px; padding: 0 26px; border-radius: 12px;
  font-size: 16px; font-weight: 600; cursor: pointer; border: none;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  font-family: inherit;
}
.btn img { width: 22px; height: 22px; }
.btn-primary { color: #06120b; background: var(--grad); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(39, 253, 124, 0.32); }
.btn-ghost {
  color: var(--text); background: var(--card); border: 1px solid var(--card-border);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); transform: translateY(-2px); }

/* ===== Hero ===== */
.hero { position: relative; padding: 88px 0 72px; }
.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 500;
  color: var(--accent); background: var(--grad-soft);
  border: 1px solid rgba(39, 253, 124, 0.22); margin-bottom: 22px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.hero h1 {
  font-size: clamp(34px, 5vw, 56px); line-height: 1.12; margin: 0 0 20px;
  font-weight: 800; letter-spacing: -0.5px;
}
.hero p.lead { font-size: 18px; color: var(--text-dim); margin: 0 0 34px; max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-sub {
  display: flex; gap: 28px; margin-top: 30px; flex-wrap: wrap;
}
.hero-sub .stat .num {
  font-size: 26px; font-weight: 800; display: block; line-height: 1.1;
}
.hero-sub .stat .label { font-size: 13px; color: var(--text-faint); }

.hero-visual { position: relative; display: flex; justify-content: center; }
.hero-visual .frame {
  position: relative; border-radius: 20px; overflow: hidden;
  border: 1px solid var(--card-border);
  box-shadow: 0 40px 90px rgba(0, 0, 0, 0.55);
}
.hero-visual .frame img { width: 100%; height: auto; display: block; }
.hero-visual .phone {
  position: absolute; right: -24px; bottom: -32px; width: 30%;
  border-radius: 22px; overflow: hidden;
  border: 3px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
}
.hero-visual .glow {
  position: absolute; inset: -40px; z-index: -1; border-radius: 40px;
  background: var(--grad); filter: blur(80px); opacity: 0.25;
}

/* ===== Section shell ===== */
.section { padding: 84px 0; }
.section-head { text-align: center; max-width: 660px; margin: 0 auto 52px; }
.section-head .eyebrow {
  font-size: 13px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(26px, 3.5vw, 40px); margin: 0 0 14px; font-weight: 800; letter-spacing: -0.5px; }
.section-head p { color: var(--text-dim); font-size: 17px; margin: 0; }

/* ===== Feature cards ===== */
.features {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.feature {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: var(--radius); padding: 30px 26px; transition: transform 0.25s, border-color 0.25s;
}
.feature:hover { transform: translateY(-4px); border-color: rgba(39, 253, 124, 0.35); }
.feature .ico {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center;
  background: var(--grad-soft); margin-bottom: 18px; font-size: 24px;
}
.feature h3 { font-size: 19px; margin: 0 0 8px; font-weight: 700; }
.feature p { color: var(--text-dim); font-size: 15px; margin: 0; }

/* ===== Showcase (screenshots) ===== */
.showcase-grid {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center;
}
.showcase-copy h2 { font-size: clamp(24px, 3vw, 34px); margin: 0 0 18px; font-weight: 800; }
.showcase-copy .check-list li {
  display: flex; gap: 12px; align-items: flex-start; margin-bottom: 16px; font-size: 16px; color: var(--text-dim);
}
.showcase-copy .check-list .tick {
  flex-shrink: 0; width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center;
  background: var(--grad); color: #06120b; font-size: 14px; font-weight: 800; margin-top: 1px;
}
.showcase-copy .check-list strong { color: var(--text); font-weight: 600; }
.showcase-media {
  position: relative; border-radius: 20px; overflow: hidden;
  border: 1px solid var(--card-border); box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5);
}

/* ===== Platforms / download ===== */
.platforms { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.platform {
  background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 28px 22px; text-align: center; transition: transform 0.25s, border-color 0.25s;
}
.platform:hover { transform: translateY(-4px); border-color: rgba(39, 253, 124, 0.35); }
.platform .os { width: 56px; height: 56px; margin: 0 auto 16px; }
.platform h3 { font-size: 18px; margin: 0 0 4px; font-weight: 700; }
.platform .desc { font-size: 13px; color: var(--text-faint); margin: 0 0 20px; min-height: 34px; }
.platform .dl {
  display: inline-flex; align-items: center; gap: 8px; width: 100%; justify-content: center;
  height: 44px; border-radius: 10px; font-size: 15px; font-weight: 600; cursor: pointer;
  color: #06120b; background: var(--grad); transition: transform 0.2s, box-shadow 0.2s;
}
.platform .dl:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(39, 253, 124, 0.3); }
.platform .dl.sub { color: var(--text); background: var(--card); border: 1px solid var(--card-border); margin-top: 10px; }
.platform .dl.sub:hover { background: rgba(255, 255, 255, 0.08); box-shadow: none; }
.platform .qr { width: 132px; height: 132px; margin: 0 auto 4px; border-radius: 12px; background: #fff; padding: 8px; }
.platform .qr img { width: 100%; height: 100%; }
.platform .hint { font-size: 12px; color: var(--text-faint); }

/* ===== FAQ ===== */
.faq { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--card-border); border-radius: 14px; background: var(--card);
  margin-bottom: 14px; overflow: hidden;
}
.faq-item summary {
  cursor: pointer; list-style: none; padding: 20px 24px; font-size: 17px; font-weight: 600;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .plus {
  flex-shrink: 0; width: 24px; height: 24px; position: relative; transition: transform 0.25s;
}
.faq-item summary .plus::before,
.faq-item summary .plus::after {
  content: ""; position: absolute; background: var(--accent); border-radius: 2px;
}
.faq-item summary .plus::before { top: 11px; left: 4px; width: 16px; height: 2px; }
.faq-item summary .plus::after { top: 4px; left: 11px; width: 2px; height: 16px; }
.faq-item[open] summary .plus { transform: rotate(135deg); }
.faq-item .answer { padding: 0 24px 22px; color: var(--text-dim); font-size: 15px; }

/* ===== Final CTA ===== */
.cta-band { padding: 72px 0; }
.cta-inner {
  position: relative; overflow: hidden; border-radius: 28px; padding: 60px 40px; text-align: center;
  background: var(--grad-soft); border: 1px solid rgba(39, 253, 124, 0.22);
}
.cta-inner h2 { font-size: clamp(26px, 3.5vw, 38px); margin: 0 0 14px; font-weight: 800; }
.cta-inner p { color: var(--text-dim); font-size: 17px; margin: 0 0 30px; }
.cta-inner .hero-actions { justify-content: center; }

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--card-border); padding: 48px 0 32px; background: var(--bg-soft);
}
.footer-top { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; margin-bottom: 36px; }
.footer-brand img { height: 26px; margin-bottom: 14px; }
.footer-brand p { color: var(--text-faint); font-size: 13px; max-width: 280px; margin: 0; }
.footer-cols { display: flex; gap: 64px; flex-wrap: wrap; }
.footer-col h4 { font-size: 14px; margin: 0 0 14px; color: var(--text); font-weight: 600; }
.footer-col a { display: block; font-size: 13px; color: var(--text-dim); margin-bottom: 10px; transition: color 0.2s; }
.footer-col a:hover { color: var(--text); }
.footer-legal { border-top: 1px solid var(--card-border); padding-top: 24px; }
.footer-legal .row { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-bottom: 8px; align-items: center; }
.footer-legal a, .footer-legal span { font-size: 11px; color: var(--text-faint); letter-spacing: 1px; }
.footer-legal a:hover { color: var(--text-dim); }
.footer-legal .gov-img { width: 12px; height: 12px; vertical-align: middle; margin-right: 4px; display: inline-block; }

/* ===== Reveal on scroll ===== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 940px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .features { grid-template-columns: 1fr 1fr; }
  .platforms { grid-template-columns: 1fr 1fr; }
  .showcase-grid { grid-template-columns: 1fr; }
  .showcase-media { order: -1; }
}
@media (max-width: 640px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle {
    display: grid; place-items: center; width: 40px; height: 40px; margin-left: auto;
    background: var(--card); border: 1px solid var(--card-border); border-radius: 10px; cursor: pointer;
  }
  .nav-toggle span { width: 18px; height: 2px; background: var(--text); position: relative; }
  .nav-toggle span::before, .nav-toggle span::after {
    content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: var(--text);
  }
  .nav-toggle span::before { top: -6px; } .nav-toggle span::after { top: 6px; }
  .mobile-menu {
    display: none; flex-direction: column; gap: 4px; padding: 12px 24px 20px;
    border-bottom: 1px solid var(--card-border); background: rgba(7, 11, 9, 0.96);
  }
  .mobile-menu.open { display: flex; }
  .mobile-menu a { padding: 12px 0; color: var(--text-dim); font-size: 15px; border-bottom: 1px solid var(--card-border); }
  .hero { padding: 56px 0 48px; }
  .section { padding: 60px 0; }
  .features, .platforms { grid-template-columns: 1fr; }
  .hero-visual .phone { width: 34%; right: -8px; }
  .footer-cols { gap: 36px; }
}

/* =========================================================
   帮助中心 & 文章页样式
   ========================================================= */

/* ===== 面包屑 ===== */
.breadcrumb { padding: 26px 0 0; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 13px; color: var(--text-faint); }
.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li:not(:last-child)::after { content: "/"; color: var(--text-faint); }
.breadcrumb a { color: var(--text-dim); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb li[aria-current] { color: var(--text-dim); }

/* ===== 帮助中心首页 ===== */
.help-hero { text-align: center; padding: 56px 0 12px; }
.help-hero h1 { font-size: clamp(30px, 4vw, 46px); font-weight: 800; margin: 0 0 14px; letter-spacing: -0.5px; }
.help-hero p { color: var(--text-dim); font-size: 17px; max-width: 560px; margin: 0 auto; }
.help-search {
  max-width: 520px; margin: 26px auto 0; display: flex; align-items: center; gap: 10px;
  background: var(--card); border: 1px solid var(--card-border); border-radius: 999px; padding: 12px 20px;
  color: var(--text-faint); font-size: 15px;
}
.help-cats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.help-cat {
  display: block; background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 28px 26px; transition: transform 0.25s, border-color 0.25s;
}
.help-cat:hover { transform: translateY(-4px); border-color: rgba(39, 253, 124, 0.35); }
.help-cat .ico { font-size: 26px; margin-bottom: 14px; display: block; }
.help-cat h3 { font-size: 19px; margin: 0 0 6px; font-weight: 700; }
.help-cat p { color: var(--text-dim); font-size: 14px; margin: 0; }
.help-list { margin-top: 14px; }
.help-list li { margin-bottom: 12px; }
.help-list a {
  display: flex; align-items: center; gap: 10px; color: var(--text-dim); font-size: 15px; transition: color 0.2s;
}
.help-list a:hover { color: var(--accent); }
.help-list a::before { content: "›"; color: var(--accent); font-size: 18px; }

/* ===== 文章正文 ===== */
.article-wrap { max-width: 800px; margin: 0 auto; padding: 8px 0 40px; }
.article-header { padding: 20px 0 28px; border-bottom: 1px solid var(--card-border); margin-bottom: 36px; }
.article-header .eyebrow { color: var(--accent); font-size: 13px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 12px; }
.article-header h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; margin: 0 0 16px; line-height: 1.2; letter-spacing: -0.5px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--text-faint); font-size: 13px; }

.article { color: var(--text-dim); font-size: 16.5px; line-height: 1.85; }
.article > p { margin: 0 0 20px; }
.article h2 { color: var(--text); font-size: 25px; font-weight: 800; margin: 44px 0 16px; letter-spacing: -0.3px; scroll-margin-top: 84px; }
.article h3 { color: var(--text); font-size: 19px; font-weight: 700; margin: 30px 0 12px; }
.article a { color: var(--accent); border-bottom: 1px solid rgba(39, 253, 124, 0.35); transition: opacity 0.2s; }
.article a:hover { opacity: 0.75; }
/* 文章内的按钮/卡片不套用正文链接样式，避免文字被盖住 */
.article a.btn, .article a.related-card { border-bottom: none; }
.article a.btn-primary { color: #06120b; }
.article a.btn-ghost { color: var(--text); }
.article a.related-card { color: inherit; }
.article strong { color: var(--text); font-weight: 600; }
.article ul, .article ol { margin: 0 0 20px; padding-left: 22px; }
.article li { margin-bottom: 10px; }
.article ul li::marker { color: var(--accent); }
.article ol li::marker { color: var(--accent); font-weight: 700; }

/* 步骤块 */
.steps { counter-reset: step; margin: 24px 0; padding: 0; list-style: none; }
.steps > li {
  position: relative; padding: 0 0 24px 52px; margin: 0;
  border-left: 2px solid var(--card-border);
}
.steps > li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps > li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: -17px; top: -4px; width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center; font-size: 14px; font-weight: 800; color: #06120b;
  background: var(--grad);
}
.steps h3 { margin: 0 0 6px; }

/* 提示/警告框 */
.callout {
  display: flex; gap: 14px; padding: 18px 20px; border-radius: 12px; margin: 24px 0;
  background: var(--grad-soft); border: 1px solid rgba(39, 253, 124, 0.22); font-size: 15px; color: var(--text-dim);
}
.callout .ci { font-size: 20px; flex-shrink: 0; }
.callout strong { display: block; color: var(--text); margin-bottom: 2px; }
.callout.warn { background: rgba(255, 196, 0, 0.06); border-color: rgba(255, 196, 0, 0.28); }

/* 表格 */
.article .table-wrap { overflow-x: auto; margin: 24px 0; }
.article table { width: 100%; border-collapse: collapse; font-size: 15px; }
.article th, .article td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--card-border); }
.article th { color: var(--text); font-weight: 600; background: var(--card); }

/* 页内 CTA */
.inline-cta {
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 22px 26px; margin: 36px 0;
}
.inline-cta .t { font-weight: 700; color: var(--text); font-size: 17px; }
.inline-cta .s { color: var(--text-faint); font-size: 14px; margin-top: 2px; }

/* 相关文章 */
.related { border-top: 1px solid var(--card-border); margin-top: 48px; padding-top: 32px; }
.related h2 { font-size: 20px; font-weight: 700; color: var(--text); margin: 0 0 18px; }
.related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.related-card {
  display: block; background: var(--card); border: 1px solid var(--card-border); border-radius: 12px;
  padding: 18px 20px; transition: transform 0.2s, border-color 0.2s;
}
.related-card:hover { transform: translateY(-3px); border-color: rgba(39, 253, 124, 0.35); }
.related-card .k { font-size: 12px; color: var(--accent); font-weight: 600; }
.related-card .h { font-size: 16px; color: var(--text); font-weight: 600; margin-top: 4px; }

@media (max-width: 640px) {
  .help-cats, .related-grid { grid-template-columns: 1fr; }
  .article { font-size: 16px; }
}