:root {
  --bg: #f6f6f3;
  --surface: #ffffff;
  --surface-2: #f3f3ef;
  --ink: #111113;
  --ink-2: #47474d;
  --muted: #86868d;
  --faint: #a8a8ae;
  --line: rgba(17, 17, 19, .07);
  --line-2: rgba(17, 17, 19, .12);
  --good: #16a34a;
  --ok: #ca8a04;
  --slow: #ea580c;
  --bad: #dc2626;
  --radius: 18px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --shadow-sm: 0 1px 2px rgba(17, 17, 19, .04);
  --shadow-md: 0 1px 2px rgba(17, 17, 19, .04), 0 10px 30px -12px rgba(17, 17, 19, .12);
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Cascadia Mono", Consolas, ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; min-height: 100dvh; background: var(--bg); color: var(--ink);
  font-family: var(--font); line-height: 1.5; -webkit-font-smoothing: antialiased; overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}
ul { list-style: none; margin: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
h1, h2, p { margin: 0; }
kbd {
  font: 500 10.5px/1 var(--mono); padding: 2px 5px; border-radius: 5px; color: var(--ink-2);
  background: var(--surface); border: 1px solid var(--line-2); box-shadow: 0 1px 0 var(--line-2);
}
.ic { display: inline-flex; width: 1.1em; height: 1.1em; flex: none; }
.ic svg { width: 100%; height: 100%; }
.mono { font-family: var(--mono); letter-spacing: -.01em; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 10px; }
::selection { background: #111; color: #fff; }

/* ---------- 背景 ---------- */
.bg { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.bg-glow {
  position: absolute; left: 50%; top: -38vh; width: max(120vw, 1100px); height: 80vh; transform: translateX(-50%);
  background:
    radial-gradient(closest-side at 32% 55%, rgba(186, 230, 216, .75), transparent),
    radial-gradient(closest-side at 52% 45%, rgba(214, 208, 255, .7), transparent),
    radial-gradient(closest-side at 70% 58%, rgba(255, 218, 196, .65), transparent);
  filter: blur(40px); opacity: .9; animation: glow 18s ease-in-out infinite alternate;
}
@keyframes glow { to { transform: translateX(-50%) translateY(3vh) scale(1.06); opacity: .75; } }
.bg-grid {
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(17, 17, 19, .09) 1px, transparent 1.2px);
  background-size: 22px 22px;
  -webkit-mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, #000 20%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, #000 20%, transparent 75%);
}

/* ---------- 布局 ---------- */
.wrap {
  width: min(460px, 100% - 32px); margin: 0 auto; padding: calc(56px + env(safe-area-inset-top)) 0 0;
  transition: opacity .4s, transform .5s var(--ease), filter .4s;
}
body.leaving .wrap { opacity: .45; transform: scale(.985); filter: blur(1.5px); }
.reveal { animation: up .8s var(--ease) calc(var(--d, 0) * 70ms) backwards; }
.head > :nth-child(2) { --d: 1; }
.head > :nth-child(3) { --d: 2; }
.head > :nth-child(4) { --d: 3; }
.head > :nth-child(5) { --d: 4; }
.notice { --d: 5; }
.links-head { --d: 6; }
.cta-wrap { --d: 7; }
.list { --d: 8; }
.quick { --d: 9; }
.foot { --d: 10; }
@keyframes up { from { opacity: 0; transform: translateY(10px); } }

/* ---------- 头部 ---------- */
.head { display: flex; flex-direction: column; align-items: center; text-align: center; }
.mark {
  width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center;
  background: linear-gradient(180deg, #2b2b2f, #0c0c0e);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .14), 0 1px 2px rgba(0, 0, 0, .2), 0 12px 24px -10px rgba(0, 0, 0, .45);
  transition: transform .5s cubic-bezier(.3, 1.6, .5, 1);
}
.mark svg { width: 46px; height: 46px; }
.mark:hover { transform: rotate(-6deg) scale(1.04); }
.mark:active, .mark.boop { transform: scale(.92); }
.mark-eyes { transform-box: fill-box; transform-origin: center; animation: blink 6s infinite; }
@keyframes blink { 0%, 94%, 100% { transform: scaleY(1); } 96% { transform: scaleY(.1); } }

.status {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 22px; padding: 5px 12px 5px 10px;
  font-size: 12.5px; color: var(--ink-2); border-radius: 999px;
  background: rgba(255, 255, 255, .7); border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  font-variant-numeric: tabular-nums;
}
.status-dot { position: relative; flex: none; width: 7px; height: 7px; border-radius: 50%; background: var(--faint); }
.status[data-level="testing"] .status-dot { animation: breathe 1.2s ease-in-out infinite; }
.status[data-level="good"] .status-dot { background: var(--good); }
.status[data-level="partial"] .status-dot { background: var(--ok); }
.status[data-level="bad"] .status-dot { background: var(--bad); }
.status[data-level="good"] .status-dot::after {
  content: ""; position: absolute; inset: 0; border-radius: 50%; background: var(--good); animation: halo 2.4s ease-out infinite;
}
@keyframes breathe { 50% { opacity: .3; } }
@keyframes halo { from { transform: scale(1); opacity: .5; } to { transform: scale(3); opacity: 0; } }

.brand { margin-top: 18px; font-size: clamp(40px, 10vw, 52px); font-weight: 700; line-height: 1.15; letter-spacing: .04em; text-indent: .04em; }
.slogan { margin-top: 10px; max-width: 24em; font-size: 15px; line-height: 1.7; color: var(--ink-2); text-wrap: balance; }
.features { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px; margin-top: 16px; font-size: 12.5px; color: var(--muted); }
.features li { display: inline-flex; align-items: center; gap: 5px; }
.features .ic { width: 14px; height: 14px; color: var(--ink-2); }

/* ---------- 公告 ---------- */
.notice {
  display: flex; align-items: flex-start; gap: 10px; margin-top: 32px; padding: 12px 14px;
  font-size: 13px; line-height: 1.65; color: var(--ink-2); border-radius: 14px;
  background: rgba(255, 255, 255, .6); border: 1px solid var(--line);
}
.notice-label {
  flex: none; margin-top: 1px; padding: 1px 7px; border-radius: 6px; font-size: 11.5px; font-weight: 600;
  color: #9a5b00; background: #fff3dc; border: 1px solid #fbe3b3;
}

@media (min-width: 900px) {
  .wrap { width: min(480px, 100% - 64px); padding-top: max(64px, 9vh); }
}

/* 手机：图标和名称并排、测速状态挪到线路区，把线路按钮提到屏幕上半部分 */
@media (max-width: 600px) {
  .wrap { padding-top: calc(26px + env(safe-area-inset-top)); }
  .head { flex-direction: row; flex-wrap: wrap; justify-content: center; align-items: center; column-gap: 12px; }
  .head > .status { display: none; }
  .mark { width: 44px; height: 44px; border-radius: 13px; }
  .mark svg { width: 36px; height: 36px; }
  .brand { min-width: 0; margin-top: 0; font-size: 30px; letter-spacing: .02em; text-indent: 0; text-align: left; overflow-wrap: anywhere; }
  .slogan, .features { flex-basis: 100%; }
  .slogan { margin-top: 12px; font-size: 14px; line-height: 1.6; }
  .features { margin-top: 10px; font-size: 12px; }
  .notice { margin-top: 18px; padding: 10px 12px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}