/* =========================================================
   汽水音乐 Soda Music — 全站样式
   视觉规范对齐官方站 music.douyin.com/qishui：
     · 近黑底 + 极暗演出照片背景，官方遮罩值 rgba(0,0,0,.35)
     · 主按钮 #ffffffd9 底 / #121212 字
     · 圆角统一 8px（不是胶囊）
     · 字重克制：正文 400，按钮与标题 500 / 600
     · 次要文字 #ffffff80，标题字距收紧
   ========================================================= */

:root {
  /* 取自官方样式表的色值 */
  --btn-bg: rgba(255,255,255,.85);
  --btn-bg-hover: #ffffff;
  --btn-text: #121212;

  --bg: #0A0A0B;
  --bg-2: #101012;
  --surface: rgba(255,255,255,.05);
  --surface-2: rgba(255,255,255,.08);
  --line: rgba(255,255,255,.1);
  --line-strong: rgba(255,255,255,.22);

  --text: #FFFFFF;
  --text-2: rgba(255,255,255,.72);
  --text-3: rgba(255,255,255,.5);

  --r-sm: 6px;
  --r: 8px;
  --r-lg: 12px;
  --r-full: 8px;

  --max: 1140px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", Helvetica, Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-weight: 400;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 极暗的演出照片背景 + 官方同款遮罩，向下渐隐为纯黑保证正文可读 */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -2;
  background-image: url(../img/stage.jpg);
  background-size: cover;
  background-position: center top;
  background-repeat: no-repeat;
}
body::after {
  content: "";
  position: fixed; inset: 0; z-index: -1;
  background: linear-gradient(180deg,
    rgba(10,10,11,.34) 0%,
    rgba(10,10,11,.56) 38%,
    rgba(10,10,11,.9) 72%,
    #0A0A0B 100%);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
ul, ol { list-style: none; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.page { position: relative; z-index: 1; }

/* ---------- 排版 ---------- */
.h1 { font-size: clamp(30px, 5vw, 52px); line-height: 1.16; font-weight: 600; letter-spacing: -.01em; }
.h2 { font-size: clamp(22px, 3vw, 32px); line-height: 1.26; font-weight: 600; letter-spacing: -.01em; }
.h3 { font-size: 16px; font-weight: 600; }
.lead { font-size: clamp(14.5px, 1.55vw, 16.5px); color: var(--text-2); font-weight: 400; }
.muted { color: var(--text-3); }

/* 首屏第二行标题：银色渐隐，替代原来的彩色渐变 */
.grad-text {
  background: linear-gradient(180deg, #FFFFFF 0%, rgba(255,255,255,.58) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sec-head { margin-bottom: 32px; }
.sec-head .h2 + .lead { margin-top: 10px; }

.eyebrow {
  display: inline-block;
  font-size: 12px; font-weight: 500; letter-spacing: .18em;
  padding: 6px 14px; border-radius: var(--r);
  color: var(--text-2);
  background: rgba(255,255,255,.06);
  border: 1px solid var(--line);
}

/* ---------- 顶栏 ---------- */
.header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(0,0,0,.75);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.header-in {
  max-width: var(--max); margin: 0 auto; padding: 12px 24px;
  display: flex; align-items: center; gap: 12px;
}
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand img { width: 30px; height: 30px; border-radius: var(--r); }
.brand-txt { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-size: 15px; font-weight: 600; letter-spacing: -.005em; }
.brand-slogan { font-size: 10.5px; color: var(--text-3); }

.nav { display: flex; align-items: center; gap: 2px; margin-left: 16px; }
.nav a {
  padding: 8px 13px; border-radius: var(--r);
  font-size: 14px; font-weight: 400; color: var(--text-2);
  transition: color .18s var(--ease), background .18s var(--ease);
}
.nav a:hover { color: var(--text); background: rgba(255,255,255,.06); }
.nav a.is-active { color: var(--text); }
.nav a.is-active::after {
  content: ""; display: block; height: 1px; margin: 5px auto -6px;
  background: #fff;
}

.header-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }

/* 语言切换 */
.lang { position: relative; }
.lang select {
  appearance: none; -webkit-appearance: none;
  background: rgba(255,255,255,.07); color: var(--text);
  border: 1px solid var(--line); border-radius: var(--r);
  padding: 8px 32px 8px 13px; font-size: 13px; font-weight: 400;
  cursor: pointer; outline: none;
  transition: border-color .18s var(--ease), background .18s var(--ease);
}
.lang select:hover { border-color: var(--line-strong); background: rgba(255,255,255,.1); }
.lang select:focus-visible { border-color: rgba(255,255,255,.5); }
.lang::after {
  content: ""; position: absolute; right: 13px; top: 50%;
  width: 6px; height: 6px; margin-top: -5px;
  border-right: 1.4px solid var(--text-2);
  border-bottom: 1.4px solid var(--text-2);
  transform: rotate(45deg); pointer-events: none;
}
.lang option { background: #141416; color: var(--text); }

/* ---------- 按钮（官方规范：#ffffffd9 底 / #121212 字 / 8px 圆角） ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; min-height: 46px;
  border-radius: var(--r); border: 1px solid transparent;
  font-size: 15px; font-weight: 500;
  transition: background .18s var(--ease), border-color .18s var(--ease), transform .16s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--btn-bg); color: var(--btn-text);
}
.btn-primary:hover { background: var(--btn-bg-hover); transform: translateY(-1px); }
.btn-ghost {
  background: rgba(255,255,255,.06); color: var(--text);
  border-color: var(--line-strong);
}
.btn-ghost:hover { background: rgba(255,255,255,.12); transform: translateY(-1px); }
.btn-sm { padding: 8px 16px; min-height: 38px; font-size: 13.5px; }
.btn-block { width: 100%; }

/* ---------- 首页 Hero ---------- */
.hero { padding: 84px 0 60px; }
.hero-grid {
  display: grid; grid-template-columns: 1.05fr .95fr;
  gap: 56px; align-items: center;
}
.hero .h1 { margin: 22px 0 18px; }
.hero .lead { max-width: 520px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-note {
  margin-top: 20px; font-size: 12.5px; color: var(--text-3);
  display: flex; align-items: center; gap: 8px;
}
.hero-note .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--text-3); }

/* 手机模型 */
.phone-stage { display: flex; justify-content: center; }
.phone {
  position: relative; width: 280px; aspect-ratio: 9 / 19;
  border-radius: 28px; padding: 10px;
  background: linear-gradient(165deg, rgba(255,255,255,.14), rgba(255,255,255,.03));
  border: 1px solid var(--line-strong);
  box-shadow: 0 34px 80px rgba(0,0,0,.7);
}
.phone::after {
  content: ""; position: absolute; left: 50%; top: 16px; transform: translateX(-50%);
  width: 66px; height: 4px; border-radius: 3px; background: rgba(255,255,255,.16);
}
.phone-screen {
  height: 100%; border-radius: 20px; overflow: hidden;
  background: radial-gradient(120% 62% at 50% 0%, rgba(255,255,255,.09), transparent 64%), #08080A;
  display: flex; flex-direction: column; padding: 32px 18px 20px;
}
.player-art {
  width: 148px; height: 148px; margin: 14px auto 0; border-radius: var(--r-lg);
  background: rgba(255,255,255,.07);
  border: 1px solid var(--line);
  display: grid; place-items: center;
}
.player-art img { width: 74px; height: 74px; border-radius: var(--r-lg); }
.player-title { margin-top: 22px; text-align: center; font-size: 14.5px; font-weight: 600; }
.player-sub { text-align: center; font-size: 11.5px; color: var(--text-3); margin-top: 4px; letter-spacing: .12em; }
.player-bar {
  height: 2px; border-radius: 2px; background: rgba(255,255,255,.14); margin: 22px 2px 0;
  overflow: hidden;
}
.player-bar i { display: block; height: 100%; width: 0%; background: rgba(255,255,255,.8); }
.player-time {
  display: flex; justify-content: space-between;
  font-size: 10.5px; color: var(--text-3); margin-top: 8px; padding: 0 2px;
  font-variant-numeric: tabular-nums;
}
.player-ctrl {
  margin-top: auto; display: flex; align-items: center; justify-content: center; gap: 24px;
  font-size: 17px; color: var(--text-2);
}
.player-ctrl button {
  border: 0; background: none; padding: 0; margin: 0;
  font: inherit; color: inherit; line-height: 1;
  display: grid; place-items: center; cursor: pointer;
}
.player-ctrl .player-btn {
  font-size: 17px;
  transition: color .18s var(--ease), transform .16s var(--ease);
}
.player-ctrl .player-btn:hover { color: var(--text); transform: scale(1.12); }
.player-ctrl .player-play {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--btn-bg); color: var(--btn-text); font-size: 16px;
  transition: background .18s var(--ease), transform .16s var(--ease);
}
.player-ctrl .player-play:hover { background: #fff; transform: scale(1.05); }

/* ---------- 数据条 ---------- */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden;
  margin-top: 72px;
}
.stat { background: rgba(12,12,14,.72); padding: 26px 20px; text-align: center; backdrop-filter: blur(8px); }
.stat b { display: block; font-size: clamp(21px, 2.5vw, 28px); font-weight: 600; letter-spacing: -.01em; }
.stat span { font-size: 12.5px; color: var(--text-3); }

/* ---------- 区块 ---------- */
.section { padding: 74px 0; }
.section-tight { padding: 50px 0; }

/* ---------- 功能网格 ---------- */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature {
  background: rgba(16,16,18,.66); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 26px 24px;
  backdrop-filter: blur(8px);
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
.feature:hover { transform: translateY(-3px); border-color: var(--line-strong); background: rgba(22,22,25,.8); }
.feature-ico {
  width: 40px; height: 40px; border-radius: var(--r); display: grid; place-items: center;
  font-size: 19px; background: rgba(255,255,255,.07); border: 1px solid var(--line);
  margin-bottom: 16px;
}
.feature .h3 { margin-bottom: 7px; }
.feature p { font-size: 13.5px; color: var(--text-2); }

/* ---------- 推荐卡片 ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  display: block; background: rgba(16,16,18,.66); border: 1px solid var(--line);
  border-radius: var(--r-lg); overflow: hidden; backdrop-filter: blur(8px);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: var(--line-strong); }
.card-cover {
  aspect-ratio: 16 / 10; position: relative;
  display: grid; place-items: center; font-size: 42px;
  background: rgba(255,255,255,.04);
  border-bottom: 1px solid var(--line);
  filter: grayscale(1) contrast(.9);
}
.card-body { padding: 17px 19px 20px; }
.card-body .h3 { font-size: 15px; }
.card-meta { font-size: 12.5px; color: var(--text-3); margin-top: 6px; }

/* ---------- CTA 条 ---------- */
.cta-band {
  border-radius: var(--r-lg); padding: 52px 44px; text-align: center;
  background: rgba(255,255,255,.05);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
}
.cta-band .h2 { margin-bottom: 12px; }
.cta-band .lead { max-width: 540px; margin: 0 auto; }
.cta-band .btn { margin-top: 26px; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); margin-top: 40px; padding: 46px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 36px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 13px; }
.footer-brand img { width: 28px; height: 28px; border-radius: var(--r); }
.footer p { font-size: 12.5px; color: var(--text-3); max-width: 330px; }
.footer h4 { font-size: 12.5px; font-weight: 600; margin-bottom: 13px; color: var(--text); }
.footer li + li { margin-top: 9px; }
.footer li a { font-size: 13px; color: var(--text-2); transition: color .18s var(--ease); }
.footer li a:hover { color: var(--text); }
.footer-bottom {
  margin-top: 36px; padding-top: 22px; border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between;
  font-size: 11.5px; color: var(--text-3); letter-spacing: .02em;
}

/* ---------- 面包屑 ---------- */
.crumb { display: flex; align-items: center; gap: 9px; font-size: 12.5px; color: var(--text-3); padding: 26px 0 0; }
.crumb a:hover { color: var(--text); }
.crumb .sep { opacity: .4; }

/* ---------- 内容页：歌单头 ---------- */
.pl-hero { display: grid; grid-template-columns: 224px 1fr; gap: 34px; padding: 30px 0 42px; align-items: end; }
.pl-cover {
  aspect-ratio: 1; border-radius: var(--r-lg); display: grid; place-items: center;
  background: rgba(255,255,255,.06); border: 1px solid var(--line);
  font-size: 68px; filter: grayscale(1) contrast(.9);
}
.pl-tag {
  display: inline-block; font-size: 11.5px; font-weight: 500; letter-spacing: .14em;
  padding: 5px 12px; border-radius: var(--r);
  color: var(--text-2); background: rgba(255,255,255,.07); border: 1px solid var(--line);
}
.pl-title { font-size: clamp(25px, 3.8vw, 40px); font-weight: 600; letter-spacing: -.015em; margin: 15px 0 12px; line-height: 1.18; }
.pl-desc { font-size: 14px; color: var(--text-2); max-width: 600px; }
.pl-meta { display: flex; flex-wrap: wrap; gap: 16px; font-size: 12.5px; color: var(--text-3); margin-top: 16px; }
.pl-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }

/* ---------- 歌曲列表 ---------- */
.panel {
  background: rgba(16,16,18,.66); border: 1px solid var(--line);
  border-radius: var(--r-lg); overflow: hidden; backdrop-filter: blur(8px);
}
.panel-head {
  padding: 17px 22px; border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
}
.panel-head .h3 { font-size: 15px; }
.panel-head span { font-size: 12.5px; color: var(--text-3); }
.tracks { padding: 8px; }
.track {
  display: grid; grid-template-columns: 34px 1fr auto auto;
  gap: 14px; align-items: center;
  padding: 11px 14px; border-radius: var(--r);
  transition: background .16s var(--ease);
}
.track:hover { background: rgba(255,255,255,.05); }
.track-no { font-size: 12.5px; color: var(--text-3); font-variant-numeric: tabular-nums; text-align: center; }
.track-name { font-size: 14px; font-weight: 500; }
.track-artist { font-size: 12.5px; color: var(--text-3); }
.track-tag {
  font-size: 10.5px; color: var(--text-2); border: 1px solid var(--line);
  background: rgba(255,255,255,.05); padding: 2px 9px; border-radius: var(--r-sm);
  letter-spacing: .06em;
}
.track-time { font-size: 12.5px; color: var(--text-3); font-variant-numeric: tabular-nums; }

/* ---------- 歌词 ---------- */
.lyrics { padding: 24px 22px; }
.lyrics p { font-size: 15px; line-height: 2.2; color: var(--text-3); transition: color .5s var(--ease); }
.lyrics p.on { color: var(--text); font-weight: 500; }

/* ---------- 相似推荐 ---------- */
.related { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.related-item {
  display: flex; align-items: center; gap: 14px;
  background: rgba(16,16,18,.66); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 13px 15px; backdrop-filter: blur(8px);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}
.related-item:hover { border-color: var(--line-strong); transform: translateY(-3px); }
.related-thumb {
  width: 44px; height: 44px; border-radius: var(--r); flex-shrink: 0;
  display: grid; place-items: center; font-size: 19px;
  background: rgba(255,255,255,.06); border: 1px solid var(--line);
  filter: grayscale(1);
}
.related-item .t { font-size: 13.5px; font-weight: 500; }
.related-item .s { font-size: 12px; color: var(--text-3); }

/* ---------- 下载页 ---------- */
.dl-hero { padding: 52px 0 32px; text-align: center; }
.dl-hero .lead { max-width: 560px; margin: 14px auto 0; }
.dl-app {
  display: inline-flex; align-items: center; gap: 16px; margin-top: 30px;
  background: rgba(16,16,18,.7); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 15px 24px 15px 16px; backdrop-filter: blur(8px);
}
.dl-app img { width: 58px; height: 58px; border-radius: var(--r-lg); }
.dl-app-info { text-align: left; }
.dl-app-info .n { font-size: 16px; font-weight: 600; }
.dl-app-info .m { font-size: 12px; color: var(--text-3); margin-top: 3px; }

/* 平台选项卡 */
.tabs { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin: 32px 0 26px; }
.tab {
  padding: 9px 20px; border-radius: var(--r);
  background: rgba(255,255,255,.05); border: 1px solid var(--line);
  font-size: 13.5px; font-weight: 500; color: var(--text-2);
  transition: all .18s var(--ease);
}
.tab:hover { color: var(--text); border-color: var(--line-strong); }
.tab.is-active {
  color: var(--btn-text); background: var(--btn-bg); border-color: transparent;
}

.dl-panels { margin-top: 6px; }
.dl-panel { display: none; }
.dl-panel.is-active { display: block; animation: fade .28s var(--ease); }
@keyframes fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.dl-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 18px; align-items: start; }
.dl-card {
  background: rgba(16,16,18,.7); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 26px 24px; backdrop-filter: blur(8px);
}
.dl-card + .dl-card { margin-top: 18px; }
.dl-card .h3 { margin-bottom: 16px; }

/* 版本信息表 */
.spec { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border-radius: var(--r); overflow: hidden; }
.spec div { background: #101012; padding: 15px 17px; }
.spec dt { font-size: 11.5px; color: var(--text-3); margin-bottom: 5px; font-weight: 400; }
.spec dd { font-size: 14px; font-weight: 500; }

/* 二维码 */
.qr-box { text-align: center; }
.qr {
  width: 168px; height: 168px; margin: 4px auto 14px;
  border-radius: var(--r); background: #fff; padding: 11px;
  display: grid; place-items: center;
}
.qr img { width: 100%; height: 100%; object-fit: contain; border-radius: var(--r-sm); }

/* 安装步骤 */
.steps { counter-reset: step; }
.steps li {
  position: relative; padding-left: 42px; padding-bottom: 22px;
  font-size: 13.5px; color: var(--text-2);
}
.steps li:last-child { padding-bottom: 0; }
.steps li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: -2px;
  width: 28px; height: 28px; border-radius: var(--r);
  display: grid; place-items: center;
  font-size: 12.5px; font-weight: 600; color: var(--btn-text);
  background: var(--btn-bg);
}
.steps li::after {
  content: ""; position: absolute; left: 13.5px; top: 30px; bottom: 4px;
  width: 1px; background: var(--line);
}
.steps li:last-child::after { display: none; }
.steps li b { color: var(--text); font-weight: 500; }

/* 需求列表 */
.reqs { display: grid; gap: 11px; }
.reqs li { display: flex; gap: 11px; font-size: 13px; color: var(--text-2); }
.reqs li::before { content: "—"; color: var(--text-3); flex-shrink: 0; }

/* FAQ */
.faq { display: grid; gap: 10px; }
.faq details {
  background: rgba(16,16,18,.7); border: 1px solid var(--line);
  border-radius: var(--r-lg); overflow: hidden;
}
.faq details[open] { border-color: var(--line-strong); }
.faq summary {
  padding: 16px 20px; font-size: 14px; font-weight: 500;
  cursor: pointer; list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; font-size: 18px; color: var(--text-3); font-weight: 300;
  transition: transform .2s var(--ease); flex-shrink: 0;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .ans { padding: 0 20px 18px; font-size: 13px; color: var(--text-2); }

/* 安全提示 */
.safe-strip {
  display: flex; align-items: center; gap: 14px;
  background: rgba(255,255,255,.05); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 15px 19px; margin-top: 20px;
}
.safe-strip .i { font-size: 20px; filter: grayscale(1); }
.safe-strip p { font-size: 12.5px; color: var(--text-2); }

/* ---------- 指南 / 文章 ---------- */
.article { max-width: 760px; }
.article-head { padding: 8px 0 26px; border-bottom: 1px solid var(--line); margin-bottom: 26px; }
.article-title { font-size: clamp(24px, 3.4vw, 36px); font-weight: 600; letter-spacing: -.015em; line-height: 1.2; margin: 15px 0 12px; }
.article-lead { font-size: 15px; line-height: 1.8; color: var(--text-2); }
.article-meta { display: flex; flex-wrap: wrap; gap: 16px; font-size: 12.5px; color: var(--text-3); margin-top: 16px; }
.article-body { padding-bottom: 14px; }
.article-body h2 { font-size: 18px; font-weight: 600; margin: 32px 0 12px; color: var(--text); }
.article-body h2:first-child { margin-top: 0; }
.article-body h3 { font-size: 15.5px; font-weight: 600; margin: 24px 0 10px; }
.article-body p { font-size: 14px; line-height: 1.95; color: var(--text-2); margin-bottom: 15px; }
.article-body ul, .article-body ol { margin: 0 0 16px; padding-left: 20px; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { font-size: 14px; line-height: 1.9; color: var(--text-2); margin-bottom: 8px; }
.article-body strong { color: var(--text); font-weight: 500; }
.article-back { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; color: var(--text-2); margin-top: 30px; }
.article-back:hover { color: var(--text); }

/* 指南列表 */
.guide-grid { display: grid; gap: 14px; }
.guide-card {
  display: block; background: rgba(16,16,18,.7); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 24px 26px; backdrop-filter: blur(8px);
  transition: transform .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.guide-card:hover { transform: translateY(-3px); border-color: var(--line-strong); background: rgba(22,22,25,.8); }
.guide-card .h3 { font-size: 16.5px; margin-bottom: 8px; }
.guide-card p { font-size: 13.5px; color: var(--text-2); }
.guide-card .article-meta { margin-top: 13px; }
.guide-more { color: var(--text-2); font-size: 13px; margin-top: 12px; display: inline-block; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero { padding: 54px 0 44px; }
  .phone-stage { order: -1; }
  .features, .cards, .related { grid-template-columns: repeat(2, 1fr); }
  .dl-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .pl-hero { grid-template-columns: 1fr; gap: 24px; }
  .pl-cover { width: 180px; }
}

@media (max-width: 720px) {
  .wrap, .header-in { padding-left: 18px; padding-right: 18px; }
  .nav { display: none; }
  .brand-slogan { display: none; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .features, .cards, .related { grid-template-columns: 1fr; }
  .section { padding: 54px 0; }
  .cta-band { padding: 38px 22px; }
  .spec { grid-template-columns: 1fr; }
  .track { grid-template-columns: 28px 1fr auto; gap: 11px; }
  .track-tag { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .phone { width: 246px; }
  .dl-app { flex-direction: column; text-align: center; padding: 20px; }
  .dl-app-info { text-align: center; }
}