/* ============ Design Tokens ============
   来源：docs/design/prototypes/portal-home.html（2026-09-26 重设计，
   由现网落地页色板收敛；无外部 design-system reference）。
   单主题：用户确认不做暗色切换。 */
:root {
  --color-bg-top: #cdeeff;        /* 天空蓝渐变上缘 */
  --color-bg-bottom: #e6f8dc;     /* 草地绿渐变下缘 */
  --color-ink: #2b3a67;           /* 主文字：深藏蓝 */
  --color-ink-soft: #5a6b9c;      /* 次文字：雾蓝 */
  --color-card: #ffffff;          /* 卡片底 */
  --color-card-border: rgba(43, 58, 103, .08);
  --color-accent: #ffb703;        /* 主按钮：糖果橙 */
  --color-accent-deep: #e09600;   /* 按钮投影 */
  --color-chip-blue: #dbeeff;     /* 图标圆底·蓝（每个 App 可换色） */
  --color-chip-orange: #ffedd0;   /* 图标圆底·橙 */
  --radius-card: 24px;
  --radius-btn: 999px;
  --radius-chip: 28px;
  --shadow-card: 0 8px 0 rgba(43, 58, 103, .06), 0 20px 40px rgba(43, 58, 103, .12);
  --shadow-btn: 0 5px 0 var(--color-accent-deep);
  --font-body: "PingFang SC", "Microsoft YaHei", sans-serif;
  --space-card: 32px 24px;
  --maxw: 760px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  min-height: 100vh;
  display: flex; flex-direction: column;   /* 页脚贴底：内容不足一屏时 footer 钉在视口底部 */
  background: linear-gradient(180deg, var(--color-bg-top) 0%, var(--color-bg-bottom) 100%);
  font-family: var(--font-body);
  color: var(--color-ink);
  overflow-x: hidden;
}
/* ---- hero 氛围装饰：纯 CSS 漂浮云朵/圆点，零图片 ---- */
.sky { position: fixed; inset: 0; pointer-events: none; z-index: 0; }
.sky i { position: absolute; border-radius: 50%; background: rgba(255,255,255,.55); }
.sky i:nth-child(1) { width: 120px; height: 120px; top: 8%;  left: -30px; }
.sky i:nth-child(2) { width: 70px;  height: 70px;  top: 22%; right: 12%;  background: rgba(255,255,255,.4); }
.sky i:nth-child(3) { width: 26px;  height: 26px;  top: 12%; right: 28%;  background: rgba(255,183,3,.35); }
.sky i:nth-child(4) { width: 46px;  height: 46px;  top: 40%; left: 8%;    background: rgba(255,255,255,.35); }
.sky i:nth-child(5) { width: 90px;  height: 90px;  top: 55%; right: -20px; background: rgba(255,255,255,.3); }
@media (prefers-reduced-motion: reduce) { .sky i { animation: none !important; } }

/* ---- hero ---- */
.hero {
  position: relative; z-index: 1;
  text-align: center;
  padding: 64px 24px 28px;
}
.hero .badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 96px; height: 96px;
  background: rgba(255,255,255,.9);
  border-radius: var(--radius-chip);
  box-shadow: var(--shadow-card);
  font-size: 52px;
}
.hero h1 { font-size: 32px; letter-spacing: .5px; margin: 18px 0 8px; }
.hero .tagline { font-size: 15px; line-height: 1.8; color: var(--color-ink-soft); }
.hero .tagline b { color: var(--color-ink); font-weight: 700; }

/* ---- App 卡片网格：手机即双列（收集模式，一行两卡） ---- */
.grid {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 14px;
  max-width: var(--maxw);
  margin: 24px auto 0;
  padding: 0 20px 40px;
}
@media (max-width: 359px) { .grid { grid-template-columns: 1fr; } }  /* 极窄屏退回单列 */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 24px 14px 20px;
  text-align: center;
  display: flex; flex-direction: column; align-items: center;
  transition: transform .15s ease;
}
.card:hover { transform: translateY(-4px); }
@media (prefers-reduced-motion: reduce) { .card, .card:hover { transition: none; transform: none; } }

.card .chip {
  display: inline-flex; align-items: center; justify-content: center;
  width: 60px; height: 60px;
  border-radius: 20px;
  font-size: 34px;
  background: var(--chip, var(--color-chip-blue));  /* 每卡可用 style 覆盖圆底色 */
}
.card h2 { font-size: 17px; margin: 12px 0 6px; }
.card .desc { font-size: 12.5px; line-height: 1.7; color: var(--color-ink-soft); }
.card .desc br { display: none; }  /* 窄卡内不强制换行，让文字自然流 */
.card .channels { margin-top: 14px; display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 9px 18px;
  background: var(--color-accent);
  color: #fff;
  font-size: 13px; font-weight: 700;
  font-family: var(--font-body);
  border: 0; border-radius: var(--radius-btn);
  text-decoration: none;
  box-shadow: var(--shadow-btn);
  cursor: pointer;
}
.btn:active { transform: translateY(3px); box-shadow: 0 2px 0 var(--color-accent-deep); }
.btn:focus-visible { outline: 3px solid var(--color-ink); outline-offset: 2px; }  /* a11y：键盘焦点 */
.btn.ghost {
  background: #eef2fb; color: var(--color-ink);
  box-shadow: 0 5px 0 #d5dded;      /* 次按钮：未来桌面版/网页版用 */
}
.btn.ghost:active { box-shadow: 0 2px 0 #d5dded; }
.platform { margin-top: 14px; font-size: 12px; font-weight: 600; color: var(--color-ink-soft); opacity: .7; }

/* ---- 预留位卡片（未来 App 未上时的占位形态） ---- */
.card.soon .chip { background: #f0f3fa; filter: grayscale(1); opacity: .5; }
.card.soon h2, .card.soon .desc { color: var(--color-ink-soft); opacity: .55; }
.card.soon .hint {
  margin-top: 22px; font-size: 13px; color: var(--color-ink-soft);
  border: 2px dashed #d5dded; border-radius: var(--radius-btn); padding: 10px 22px;
}

/* ---- 页脚（含 ICP，合规保留） ---- */
.foot {
  position: relative; z-index: 1;
  margin-top: auto;               /* flex 布局下把页脚推到最底 */
  text-align: center; padding: 20px 24px 24px;
  font-size: 12.5px; color: var(--color-ink-soft); opacity: .78;
  line-height: 2;
}
.foot a { color: inherit; text-decoration: none; }
.foot a:hover { text-decoration: underline; }