/* ============================================================
   流星小栈 · 全站公共样式（2026 清爽亮青 · 平面化版）
   设计方向：近白淡青底 · 提亮青系 · 平面化卡片 · 衬线大字排版 · 纯静态零依赖
   配色：单一清新青系 —— 强调青 #22A5B5 ｜ 深阶 #17808F ｜ 薄荷点缀 #6EE7C8
        标题墨 #0C2022 ｜ 副标题 #345052 ｜ 正文灰 #5C7374 ｜ 描边线 #DCEAE8
   无外链字体/CDN，仅使用系统本地字体栈
   ============================================================ */
:root {
  /* 强调色：全站只使用这一支清新青系，不再引入第二色相 */
  --accent: #22A5B5;
  --accent-strong: #17808F;
  --accent-deep: #0F6774;
  --btn-bg: #17808F;
  --btn-bg-hover: #0F6774;
  /* 兼容旧变量名：原「极光紫」二级色统一并入同色系深阶 */
  --accent-violet: #17808F;
  --accent-soft: #DCF0EF;
  --accent-tint: #E8F5F4;
  --mint: #6EE7C8;
  /* 底色与文字层级（近白淡青，轻快清爽） */
  --bg: #F4FAF9;
  --surface: #FFFFFF;
  /* 极浅的面（无投影）：网格单元 / 面板用 soft；hover 浮出面刻意贴近底色、远离纯白 */
  --surface-soft: #EDF6F5;
  --surface-hover: #F3FAF9;
  --ink: #0C2022;
  --text: #345052;
  --muted: #5C7374;
  --label: #5F7677;
  --line: #DCEAE8;
  --line-soft: #E8F2F1;
  --line-strong: #C3D8D6;
  --radius: 22px;
  --radius-sm: 14px;
  --radius-lg: 30px;
  --radius-btn: 12px;
  --maxw: 1100px;
  /* 投影一律用中性墨色，轻而干净，呼应平面化 */
  --shadow-sm: 0 1px 3px rgba(12, 32, 34, .05);
  --shadow-md: 0 16px 36px -18px rgba(12, 32, 34, .14);
  --shadow-lg: 0 28px 60px -26px rgba(12, 32, 34, .18);
  --grad-brand: linear-gradient(120deg, #2FB6C4 0%, #1E8FA0 55%, #17808F 100%);
  --ease: cubic-bezier(.22, .61, .36, 1);
  /* 标题专用衬线栈：全部系统本地字体，不引外链/CDN */
  --font-display: "Songti SC", "Source Han Serif SC", "Source Han Serif CN", "Noto Serif SC", "STSong", "SimSun", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "MiSans", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent-strong); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--accent-deep); }
img { max-width: 100%; }

/* ============================================================
   滚动渐入动画
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.revealed { opacity: 1; transform: translateY(0); }
.app-row.reveal:nth-child(1) { transition-delay: 0s; }
.app-row.reveal:nth-child(2) { transition-delay: .08s; }
.app-row.reveal:nth-child(3) { transition-delay: .16s; }
.app-row.reveal:nth-child(4) { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============================================================
   光雾背景（柔和漂浮的青色光球）
   ============================================================ */
/* 光球层：平面化版本整体关闭，避免模糊色球破坏清爽观感。
   若需恢复，删除下面这一行 display 即可（.orb-* 各条规则仍完整保留）。 */
.aurora {
  display: none;
  position: absolute; inset: 0; overflow: hidden; pointer-events: none;
  /* 底部渐隐：避免光球在分区边界被硬裁切出可见接缝（不支持的浏览器自动降级为原样） */
  -webkit-mask-image: linear-gradient(to bottom, #000 58%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 58%, transparent 100%);
}
.orb {
  position: absolute; border-radius: 50%;
  filter: blur(58px); opacity: .5; will-change: transform;
}
.orb-1 { width: 520px; height: 520px; left: -140px; top: -180px;
  background: radial-gradient(circle, rgba(34, 165, 181, .34), transparent 68%);
  animation: drift 16s ease-in-out infinite; }
.orb-2 { width: 460px; height: 460px; right: -120px; top: -120px;
  background: radial-gradient(circle, rgba(15, 103, 116, .28), transparent 70%);
  animation: drift 20s ease-in-out infinite 2s; }
.orb-3 { width: 380px; height: 380px; left: 28%; bottom: -200px;
  background: radial-gradient(circle, rgba(110, 231, 200, .30), transparent 70%);
  animation: drift 18s ease-in-out infinite 4s; }
.orb-4 { width: 340px; height: 340px; right: 18%; bottom: -120px;
  background: radial-gradient(circle, rgba(23, 128, 143, .26), transparent 70%);
  animation: drift 22s ease-in-out infinite 6s; }
@keyframes drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(26px, -22px) scale(1.06); }
}
@media (prefers-reduced-motion: reduce) {
  .orb { animation: none; }
}

/* ---------------- 顶部导航（平面化：纯色底 + 细分隔线） ---------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: #FFFFFF;
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  height: 68px; display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--ink); letter-spacing: .5px; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.brand:hover { color: var(--ink); }
.nav-links { display: flex; gap: 28px; }
.nav-links a { color: var(--muted); font-size: 15px; position: relative; padding: 4px 0; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -2px; height: 2px;
  background: var(--grad-brand); border-radius: 2px; transition: right .25s var(--ease);
}
.nav-links a:hover { color: var(--accent-strong); }
.nav-links a:hover::after { right: 0; }

/* ============================================================
   主视觉 Hero（淡青底 + 通栏文案 + 流星意象）
   ============================================================ */
.hero {
  position: relative; overflow: hidden;
  padding: 96px 24px 88px; text-align: left;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(58% 52% at 20% 12%, rgba(34, 165, 181, .14), transparent 70%),
    radial-gradient(46% 46% at 84% 6%, rgba(15, 103, 116, .10), transparent 70%),
    radial-gradient(40% 40% at 60% 70%, rgba(110, 231, 200, .13), transparent 70%);
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, #000 55%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 55%, transparent 100%);
}
.hero-stars { position: absolute; inset: 0; z-index: 1; opacity: .5; pointer-events: none; }
.hero-stars .meteor { opacity: 0; }
.hero-stars .meteor:nth-child(1) { animation: meteor 4.8s ease-in infinite; }
.hero-stars .meteor:nth-child(2) { animation: meteor 4.8s ease-in infinite 2.4s; }
@keyframes meteor {
  0%   { transform: translate(0, 0); opacity: 0; }
  8%   { opacity: 1; }
  42%  { transform: translate(-140px, 80px); opacity: 0; }
  100% { transform: translate(-140px, 80px); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-stars .meteor { animation: none; opacity: .6; }
}

.hero-inner {
  position: relative; z-index: 2; max-width: var(--maxw); margin: 0 auto;
  display: flex; align-items: center; gap: 64px;
}

/* 英雄区文案栏（通栏排版，文案直接落在淡青底上） */
.hero-card {
  position: relative; flex: 1; min-width: 0;
  background: none; border: none; box-shadow: none;
  backdrop-filter: none; -webkit-backdrop-filter: none;
  border-radius: 0; padding: 0;
}
.hero-card::after { display: none; }

/* 右栏星轨线描（纯装饰，不承载信息；颜色走 currentColor 以便暗色模式跟随） */
.hero-art { flex: 0 0 auto; color: var(--accent-strong); line-height: 0; }
.hero-art svg { display: block; width: 400px; height: auto; }
/* 通栏排版下隐藏背景星点/流星，避免与右栏星轨重复且干扰标题 */
.hero-editorial .hero-stars { display: none; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 9px;
  background: none; border: none; border-radius: 0; padding: 0;
  color: var(--label); font-size: 13px; font-weight: 500; letter-spacing: 1.4px;
  box-shadow: none; backdrop-filter: none;
}
.hero-badge::before {
  content: ""; width: 22px; height: 1px; flex-shrink: 0;
  background: var(--accent); opacity: .6;
}
.hero-badge .spark { color: var(--accent-strong); }
.hero h1 {
  font-family: var(--font-display);
  font-size: 80px; margin: 18px 0 12px; letter-spacing: 10px;
  font-weight: 700; line-height: 1.12;
  color: var(--ink);
  text-wrap: balance;
}
.hero-tagline {
  color: var(--text); font-size: 19px; font-weight: 500; margin: 0 0 12px; letter-spacing: 2px;
}
.hero-desc { color: var(--muted); font-size: 15px; line-height: 2; margin: 0; max-width: 620px; }
/* 宽屏手动控制中文断行，避免「本 / 网站」这类拆词；窄屏自动换行 */
.hero-desc .br-wide { display: none; }
@media (min-width: 760px) { .hero-desc .br-wide { display: inline; } }
/* display:flex（块级）让「查看开源许可」独立成行 */
.hero .hero-cta { margin-top: 32px; display: flex; gap: 14px; flex-wrap: wrap; justify-content: flex-start; }
.hero-link {
  display: inline-block; margin-top: 22px; font-size: 14.5px; font-weight: 600;
  color: var(--accent-strong);
}
.hero-link:hover { color: var(--accent-deep); }

/* ---------------- 按钮（平面化：纯色 + 轻投影，仅 hover 浮起） ---------------- */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  position: relative; overflow: hidden;
  background: var(--btn-bg);
  color: #fff; border-radius: var(--radius-btn); padding: 14px 30px; font-size: 15px; font-weight: 600;
  box-shadow: var(--shadow-sm);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
}
.btn-primary:hover { color: #fff; background: var(--btn-bg-hover); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-primary::before {
  content: ""; position: absolute; top: 0; left: -80%;
  width: 50%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,.22), transparent);
  transform: skewX(-20deg); transition: left .65s var(--ease);
}
.btn-primary:hover::before { left: 120%; }

/* 色块缓慢流光（供 .app-row-icon / .page-head .app-icon 使用） */
@keyframes aurora-flow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  background: #FFFFFF; color: var(--accent-strong); border: 1px solid var(--line-strong);
  border-radius: var(--radius-btn); padding: 14px 30px; font-size: 15px; font-weight: 600;
  box-shadow: none;
  transition: transform .25s var(--ease), border-color .25s var(--ease), background .25s, color .25s;
}
.btn-ghost:hover { color: var(--accent-deep); border-color: var(--accent); background: var(--surface-hover); transform: translateY(-2px); }

/* 标题强调文字（实色墨字以贴合清爽调性） */
.meteor-text { color: var(--ink); }

/* ============================================================
   板块与长条应用卡片
   ============================================================ */
/* 板块顶部淡分割线：英雄区↔移动端、移动端↔桌面端 均有一道 */
.section {
  max-width: var(--maxw); margin: 0 auto; padding: 16px 24px 60px; position: relative;
  border-top: 1px solid var(--line);
}
.section-head { display: flex; align-items: center; gap: 12px; margin: 34px 0 16px; }
.section-head h2 { position: relative; font-size: 26px; margin: 0; color: var(--ink); font-weight: 700; letter-spacing: .5px; padding-bottom: 14px; }
/* 板块标题下方「流星尾迹」渐变分界线：强调青 → 透明，丰富层次并呼应品牌意象 */
.section-head h2::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 108px; height: 3px; border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), rgba(34, 165, 181, .35), transparent);
}
.section-head .sec-emoji {
  width: 46px; height: 46px; border-radius: 14px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent-soft), #fff);
  border: 1px solid var(--line-soft);
  display: flex; align-items: center; justify-content: center; font-size: 22px;
}
.section-desc { color: var(--muted); font-size: 15px; margin: 0 0 22px; }

.app-row-list { display: flex; flex-direction: column; gap: 0; }
.app-row {
  position: relative; overflow: hidden;
  display: flex; align-items: flex-start; gap: 22px;
  /* 平面化：静止时不铺底、不描边、不投影，与画布融为一体；hover 时再浮出 */
  background: none; border: 1px solid transparent; border-radius: var(--radius);
  padding: 24px 26px;
  box-shadow: none;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease),
              border-color .28s var(--ease), background .28s var(--ease);
}
.app-row::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px;
  background: var(--grad-brand); opacity: 0; transition: opacity .25s var(--ease);
}
.app-row::after {
  content: ""; position: absolute; top: 0; left: -80%; width: 55%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(34, 165, 181, .10), rgba(110, 231, 200, .07), transparent);
  transform: skewX(-22deg); transition: left .85s var(--ease); pointer-events: none;
}
/* 卡片之间的淡分割线：列表间距归零后由边框承担分隔，线正好落在上下两行内容正中 */
.app-row + .app-row { border-top: 1px solid var(--line); }
.app-row:hover {
  transform: translateY(-4px);
  background: var(--surface-hover); border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
}
a.app-row:hover { color: var(--text); }
.app-row:hover::before { opacity: 1; }
.app-row:hover::after { left: 130%; }

.app-row-icon {
  width: 74px; height: 74px; border-radius: 18px; flex-shrink: 0;
  background: var(--grad-brand); background-size: 200% 200%;
  display: flex; align-items: center; justify-content: center; font-size: 34px;
  animation: aurora-flow 6s ease infinite;
}
.app-row-body { flex: 1; min-width: 0; }
.app-row-title { font-size: 21px; font-weight: 700; color: var(--ink); letter-spacing: .3px; }
.app-row-desc { margin: 6px 0 0; color: var(--muted); font-size: 15px; line-height: 1.7; }
.app-row-tags { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 8px; }
.app-row-tags .tag,
.card-tags .tag {
  font-size: 12px; background: var(--accent-tint); border: 1px solid var(--line-soft);
  border-radius: 8px; padding: 4px 10px; color: var(--accent-strong); font-weight: 500;
}

.app-row.disabled { opacity: .66; cursor: default; border-style: dashed; }
.app-row.disabled:hover { transform: none; background: none; box-shadow: none; border-color: transparent; }
.app-row.disabled::before { display: none; }
.app-row.disabled .app-row-icon {
  background: linear-gradient(135deg, #E8F2F1, #DCEAE8); box-shadow: none;
  animation: none;
}
.app-row.disabled .tag.soon { background: var(--accent-soft); color: var(--accent-strong); border-color: transparent; font-weight: 600; }

/* 保留卡片网格（兼容） */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 22px; }
.card {
  position: relative; overflow: hidden;
  background: var(--surface-soft); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 28px; display: block; color: var(--text); box-shadow: none;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease), border-color .28s var(--ease);
}
.card::after {
  content: ""; position: absolute; left: 0; top: 0; height: 4px; width: 100%;
  background: var(--grad-brand); opacity: 0; transition: opacity .28s var(--ease);
}
a.card:hover { color: var(--text); transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: var(--line-strong); }
a.card:hover::after { opacity: 1; }
.card .card-icon {
  width: 56px; height: 56px; border-radius: 15px;
  background: var(--grad-brand); display: flex; align-items: center; justify-content: center;
  font-size: 28px; margin-bottom: 16px;
}
.card h3 { margin: 0 0 8px; font-size: 20px; color: var(--ink); font-weight: 700; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.card .card-tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.card.disabled { opacity: .72; cursor: default; border-style: dashed; }
.card.disabled::after { display: none; }
.card.disabled .card-icon { background: linear-gradient(135deg, #E8F2F1, #DCEAE8); box-shadow: none; }
.card.disabled .tag.soon { background: var(--accent-soft); color: var(--accent-strong); border-color: transparent; font-weight: 600; }

/* ============================================================
   应用详情页
   ============================================================ */
.hero.page-hero { padding: 40px 24px 20px; text-align: left; }
.hero.page-hero h1 { font-size: 32px; margin: 10px 0 6px; letter-spacing: 2px; }
.page-head {
  position: relative; z-index: 2; max-width: var(--maxw); margin: 0 auto;
  display: flex; gap: 24px; align-items: center; flex-wrap: wrap;
}
.page-head .app-icon {
  width: 96px; height: 96px; border-radius: 24px; flex-shrink: 0;
  background: var(--grad-brand); background-size: 200% 200%;
  display: flex; align-items: center; justify-content: center; font-size: 48px;
  animation: aurora-flow 6s ease infinite;
}
.page-head .sub { color: var(--muted); font-size: 14.5px; margin: 0; }

/* 真实应用图标：替换 emoji 渐变容器时，去掉底色与流光动画，由容器圆角直接裁剪图标 */
.app-row-icon.img-icon,
.page-head .app-icon.img-icon { background: none; animation: none; overflow: hidden; }
.app-row-icon.img-icon img,
.page-head .app-icon.img-icon img { width: 100%; height: 100%; display: block; }

.content { max-width: var(--maxw); margin: 0 auto; padding: 16px 24px 56px; }
.content h2 {
  font-size: 22px; margin: 44px 0 16px; color: var(--ink); font-weight: 700;
  display: flex; align-items: center; gap: 10px;
}
.content h2::before {
  content: ""; width: 5px; height: 22px; border-radius: 3px;
  background: var(--grad-brand);
}

.feature-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.feature-list li {
  background: var(--surface-soft); border: 1px solid transparent; border-radius: var(--radius-sm);
  padding: 15px 18px; margin: 0; font-size: 14.5px; color: var(--text);
  box-shadow: none; transition: border-color .2s var(--ease), transform .2s var(--ease), background .2s var(--ease);
}
.feature-list li:hover { background: var(--surface-hover); border-color: var(--line); transform: translateY(-2px); }
.feature-list li b { color: var(--accent-strong); }

.shots { display: flex; gap: 18px; overflow-x: auto; padding: 10px 2px 22px; -webkit-overflow-scrolling: touch; scroll-snap-type: x proximity; }
.shots figure { margin: 0; flex: 0 0 auto; text-align: center; scroll-snap-align: start; }
.shots img {
  height: 440px; width: auto; border-radius: 16px; border: 1px solid var(--line);
  background: #fff; box-shadow: none; transition: transform .3s var(--ease);
}
.shots figure:hover img { transform: translateY(-4px); }
.shots figcaption { font-size: 13px; color: var(--muted); margin-top: 10px; }

/* ---------------- 商店跳转区 ---------------- */
.store-note {
  display: flex; align-items: center; gap: 10px;
  background: var(--accent-tint); border: 1px solid var(--line-soft); border-radius: var(--radius-sm);
  padding: 14px 18px; color: var(--accent-strong); font-size: 14.5px; margin-bottom: 20px;
}
.store-note .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); flex-shrink: 0; position: relative; }
.store-note .dot::after {
  content: ""; position: absolute; inset: -5px; border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 165, 181, .35), transparent 70%);
  animation: dot-pulse 2.2s ease-out infinite; opacity: .7;
}
@keyframes dot-pulse {
  0% { transform: scale(.8); opacity: .6; }
  70% { transform: scale(2.2); opacity: 0; }
  100% { transform: scale(2.2); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) { .store-note .dot::after { animation: none; opacity: 0; } }

.store-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; }
.store-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  background: none; border: 1px solid var(--line); border-radius: 14px;
  padding: 14px 12px; font-size: 15px; color: var(--ink); font-weight: 600;
  box-shadow: none; transition: transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.store-btn:hover { color: var(--accent-strong); border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.store-btn.disabled { opacity: .6; cursor: not-allowed; color: var(--muted); }
.store-btn.disabled:hover { border-color: var(--line); color: var(--muted); transform: none; box-shadow: var(--shadow-sm); }
.store-btn .soon { font-size: 12px; color: var(--accent-strong); background: var(--accent-soft); border-radius: 6px; padding: 1px 7px; font-weight: 600; }

/* ============================================================
   页脚
   ============================================================ */
.footer { border-top: 1px solid var(--line-soft); background: #fff; margin-top: 32px; }
.footer-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 34px 24px 40px;
  color: var(--muted); font-size: 13px; text-align: center;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: center; margin-bottom: 12px; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--accent-strong); }
.footer-inner p { margin: 7px 0; }
.footer-inner a { color: var(--muted); }
.footer-inner a:hover { color: var(--accent-strong); }
.footer-sep { color: var(--line); }

/* ============================================================
   通用面板
   ============================================================ */
.panel {
  background: var(--surface-soft); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 26px; box-shadow: none; margin: 16px 0;
}
.panel h3 { margin: 0 0 8px; font-size: 18px; color: var(--ink); font-weight: 700; }
.panel ul { margin: 0; padding-left: 20px; color: var(--text); }
.panel li { margin: 8px 0; }

/* ============================================================
   深色模式
   ============================================================ */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B1517;
    --surface: #111D1F;
    --surface-soft: #141E21;
    --surface-hover: #18262A;
    --ink: #EAF4F3;
    --text: #B7C9C8;
    --muted: #839796;
    --label: #93A9A8;
    --line: #1E3032;
    --line-soft: #182628;
    --line-strong: #2B4244;
    --accent: #25ABBB;
    --accent-strong: #53C2CE;
    --accent-deep: #7ED3DC;
    --accent-soft: #143230;
    --accent-tint: #102422;
    --btn-bg: #1F8795;
    --btn-bg-hover: #22A5B5;
    --mint: #57D9B8;
    --grad-brand: linear-gradient(120deg, #63C7D2 0%, #2FB6C4 55%, #25ABBB 100%);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, .35);
    --shadow-md: 0 16px 36px -18px rgba(0, 0, 0, .55);
    --shadow-lg: 0 28px 60px -26px rgba(0, 0, 0, .6);
  }
  body { background: var(--bg); }
  .nav { background: #0B1517; border-bottom-color: var(--line-soft); }
  .hero-card { background: none; border-color: transparent; }
  .hero-tagline { color: var(--ink); }
  .hero-badge { background: none; border-color: transparent; }
  .btn-ghost { background: var(--surface); color: var(--accent-strong); border-color: var(--line-strong); }
  .btn-ghost:hover { background: var(--surface-hover); border-color: var(--accent); color: var(--accent-deep); }
  .footer { background: #0B1517; }
  .store-btn, .card, .feature-list li, .panel { background: var(--surface-soft); }
  /* 平面化的应用卡片：静止态在暗色下同样不铺底（hover 态沿用亮色规则，取暗色的 --surface） */
  .app-row { background: none; }
  .shots img { background: #0B1517; }
  .app-row:hover, .card:hover, .feature-list li:hover { border-color: var(--line-strong); }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 900px) {
  .hero-inner { display: block; }
  .hero-art { display: none; }
}
@media (max-width: 760px) {
  .feature-list { grid-template-columns: 1fr; }
  .hero h1 { font-size: 46px; letter-spacing: 5px; }
  .hero-card { padding: 0; }
}
@media (max-width: 600px) {
  body { font-size: 15px; }
  .hero { padding: 52px 18px 44px; }
  .hero h1 { font-size: 38px; letter-spacing: 3px; }
  .hero-tagline { font-size: 17px; }
  .hero-card { padding: 0; border-radius: 0; }
  .hero .hero-cta { flex-direction: column; width: 100%; }
  .hero .hero-cta .btn-primary, .hero .hero-cta .btn-ghost { justify-content: center; }
  .section, .content, .page-head { padding-left: 18px; padding-right: 18px; }
  .nav-links { gap: 16px; }
  .shots img { height: 340px; }
  .page-head { padding-top: 8px; }
  .page-head .app-icon { width: 80px; height: 80px; font-size: 40px; border-radius: 20px; }
  .hero.page-hero { padding-top: 28px; }
  .hero.page-hero h1 { font-size: 26px; }
  .app-row { padding: 18px 20px; gap: 16px; }
  .app-row-icon { width: 62px; height: 62px; font-size: 28px; border-radius: 15px; }
  .app-row-title { font-size: 18px; }
  .app-row-desc { font-size: 14px; }
}
@media (max-width: 360px) {
  .nav-inner { padding: 0 12px; }
  .brand { font-size: 16px; gap: 6px; }
  .brand img { width: 28px; height: 28px; }
  .nav-links { gap: 11px; }
  .nav-links a { font-size: 14px; }
}