:root {
  --ink: #101820;
  --soft: #3d4f5f;
  --muted: #8a97a3;
  --line: #d5dee6;
  --paper: #f4f7fa;
  --panel: #fff;
  --teal: #0b6e6e;
  --teal-deep: #084f4f;
  --row-h: clamp(148px, 18vw, 200px);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  font-family: "IBM Plex Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(ellipse 70% 45% at 0% 0%, #ffe8a8 0%, transparent 55%),
    radial-gradient(ellipse 55% 40% at 100% 5%, #cfeceb 0%, transparent 50%),
    var(--paper);
  line-height: 1.5;
}
.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 20px 72px;
}
.mast {
  margin-bottom: 28px;
}
.mast .kicker {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
  font-weight: 600;
  margin: 0 0 10px;
}
.mast h1 {
  font-family: "Noto Serif SC", "Songti SC", serif;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.25;
  margin: 0;
}
.mast .sub {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--soft);
}
.tier {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px 18px;
  margin-bottom: 42px;
  align-items: start;
}
.tier-label {
  color: var(--muted);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.42em;
  font-size: 14px;
  font-weight: 600;
  padding-top: 18px;
  position: sticky;
  top: 20px;
  justify-self: center;
  user-select: none;
}
.stream {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.row {
  position: relative;
  display: block;
  height: var(--row-h);
  border-radius: 14px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  background: #e8eef2;
  isolation: isolate;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.row:hover,
.row:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(16, 24, 32, 0.1);
  outline: none;
}
.row-visual {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.row-visual img {
  position: absolute;
  right: 0;
  top: 0;
  width: min(68%, 780px);
  height: 100%;
  object-fit: cover;
  display: block;
}
.row-visual .fade {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    var(--paper) 0%,
    var(--paper) 28%,
    rgba(244, 247, 250, 0.92) 38%,
    rgba(244, 247, 250, 0.45) 52%,
    rgba(244, 247, 250, 0.08) 68%,
    transparent 78%
  );
  pointer-events: none;
}
.row-copy {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 24px;
  max-width: min(52%, 520px);
}
.row .num {
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--teal);
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  display: grid;
  place-items: center;
  box-shadow: 0 4px 12px rgba(11, 110, 110, 0.25);
}
.row h2 {
  margin: 0 0 6px;
  font-size: clamp(16px, 1.6vw, 20px);
  font-weight: 700;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
}
.row .metrics {
  font-size: 12px;
  font-weight: 500;
  color: var(--soft);
  letter-spacing: 0.01em;
}
.row .ip {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}
.foot {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
}
@media (max-width: 720px) {
  .tier { grid-template-columns: 28px 1fr; gap: 10px; }
  .tier-label { font-size: 12px; letter-spacing: 0.28em; }
  .row-visual img { width: 78%; }
  .row-copy { max-width: 70%; padding: 0 14px; }
  .row .metrics { display: block; width: 100%; margin-top: 2px; }
}